B. ΔH2: energy associated with the separation of LiCl ions
C. ΔH3: energy associated with the formation of water-ion interactions
D. ΔHsoln: the enthalpy of solution
Options A and B refer to the enthalpy change associated with the separation of the ions of lithium chloride and the formation of water-ion interactions, both of them are endothermic processes and would require energy to be added to the system.
Option D refers to the enthalpy of solution which is the enthalpy change associated with the dissolution of a substance in a solvent, and it is exothermic when the enthalpy change is negative.
So, options B, C and D are exothermic and need to be selected.
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Options C and D are associated with the dissolution of lithium chloride which is exothermic.
C. ΔH3: energy associated with the formation of water-ion interactions
D. ΔHsoln: the enthalpy of solution
The dissolution of a solid in a liquid is an exothermic process, it means that heat is released. So, the enthalpy change (ΔH) for the dissolution of lithium chloride will be negative.
ΔH3 represents the energy associated with the formation of water-ion interactions and ΔHsoln represents the enthalpy of the solution, which is the overall enthalpy change for the dissolution process.
Both of these values will be negative for an exothermic process.
ΔH1 and ΔH2 represent the energy associated with the separation of water molecules and LiCl ions respectively, which are not relevant to the dissolution process.
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what are the two products for when limestone decomposes?
Answer:
when limestone decomposes it forms calcium oxide and carbon dioxide
Answer:lidmestone on heating descomposes into quick lime anda carbón dioxide gas
Explanation:
when lidmestone is heated steongly the calciul carbonato ir contains absorba heat (endothermic) ando descomposes to forma calciul oxide
9. How many grams of NaNO3 will you need to make 375.0 mL of a 2.43 M solution?
Answer:
You will need 77.5 grams of NaNO₃.
Explanation:
Molarity is a unit of concentration defined in terms of moles of solute per liter of solution.
Because we are given the molarity and volume of the solution, we can work backwards to compute how many moles of solute (NaNO₃) we need, from which we can determine the corresponding mass.
Mathematically, the molarity of a solution is represented by M = n/V, where M is the molarity of the solution, n is the number of moles of solute, and V is the volume of the solution (in liters). We can rearrange this equation to solve for the number of moles of solute:
n = MV
which, in our case, is equal to (2.43 M NaNO₃)(0.3750 L) = 0.91125 moles NaNO₃.
We are asked how many grams of NaNO₃ are needed to make this solution. So, to convert from moles to grams, we multiply the number of moles of NaNO₃ we have just obtained by the molar mass of NaNO₃, or 84.9947 g/mol.
m = (0.91125 moles NaNO₃)(84.9947 g NaNO₃/moles NaNO₃)
m = 77.451 g NaNO₃
To three significant figures, we need 77.5 grams of NaNO₃ to make 375.0 mL of a 2.43 M solution of NaNO₃.
1. Write the balanced equation and draw the particulate representation of the following chemical reaction: sodium metal reacts with chlorine gas to produce sodium chloride.
2. Draw the complete decomposition of 4 molecules of hydrogen peroxide (H2O2) into water and hydrogen gas
The balanced chemical equation and particulate representation of the chemical reaction of sodium metal (Na) reacting with chlorine gas (Cl2) to produce sodium chloride (NaCl) is: Na + Cl2 -> NaCl
The particulate representation of this reaction would show a sodium atom (Na) losing an electron to form a positive ion (Na+), and a chlorine molecule (Cl2) gaining an electron to form two chloride ions (Cl-). The resulting ions then combine to form a neutral compound, sodium chloride (NaCl).
The balanced chemical equation and particulate representation of the complete decomposition of 4 molecules of hydrogen peroxide (H2O2) into water (H2O) and hydrogen gas (H2) is: 2H2O2 -> 2H2O + O2
The particulate representation of this reaction would show two hydrogen peroxide molecules breaking down into two water molecules and one oxygen molecule. The oxygen molecule is released as a gas and the water molecules remain in their liquid form.
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Ammonia chemically reacts with oxygen gas to produce nitric oxide and water. What mass of oxygen gas is consumed by the reaction of of ammonia?.
15.90 g mass of oxygen gas is consumed by the reaction of of ammonia. when Ammonia chemically reacts with oxygen gas to produce nitric oxide and water.
The mole is the fundamental unit of measurement in SI units for the amount of substance. It is defined as the mass of substance containing in the same number of particles found in 12.000 g of carbon atom (12C).
The molar mass is defined as the sum of masses of the atoms or molecules expressed in grams, and it is contributed by one mole of an atom or molecule.
The significant figures of a number are digits that carry meaning contributing to their measurement resolutions. The number of significant figures indicates the precision of a measurement instead of its magnitude. There are certain rules to determine significant digit.
The number of moles is calculated by the formula as follows:
Number of moles = given mass(g/molar mass(g/mol)
Step: 1
The reaction is as follows:
4NH3+5O2⟶4NO+6H2O
Here, the reactants are ammonia and oxygen and the product formed include nitric oxide and water. More precisely we can say that, 4 moles of ammonia react with 5 moles of oxygen to give 4 moles of nitric oxide and 6 moles of water.
Hint:
Find the mass of oxygen gas.
Step: 2
Consider the reaction as follows
4NH3+5O2⟶4NO+6H2O
Weight of 4 moles of ammonia = 4×17
=68g
Weight of 5 moles of oxygen = 5×32
=160g
Here
4 moles of ammonia ≡ 5 moles of oxygen
Therefore:
68 g of ammonia ≡ 10 g of oxygen
Therefore,
The mass of oxygen corresponding to 6.76 g of ammonia is calculated as follows:
mass of oxygen = 6.6g×160g / 68g
=15.90 g
Initially, the chemical reaction is considered. From that, it is clear that
4 moles of ammonia ≡ 5 moles of oxygen
Therefore,
68 g of ammonia ≡ 160 g of oxygen
Then, the mass of oxygen corresponding to 6.76g of ammonia is calculated by multiplying 6.76g with 160 g of oxygen and divided by the answer with 68 g. The mass of oxygen corresponding to 6.76g of ammonia is 15.90 g
The mass of oxygen corresponding to 6.76 g of ammonia is 15.90 g.
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What happens to the electrons in an oxidation reaction?
In an oxidation reaction, electrons are lost by the molecule or ion that is being oxidized.
The electrons that are lost are typically transferred to another molecule or ion, which is then reduced. Oxidation and reduction always occur together, as they are two sides of the same chemical reaction.
Oxidation and reduction are chemical processes that are closely related to one another, and they can occur in many different ways. Oxidation involves the loss of electrons from a molecule or ion, while reduction involves the gain of electrons.
These two processes are often referred to as the “redox” or “reduction-oxidation” reactions, and they are essential for many biological and chemical processes.
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The molar mass of a compound is 92g/mol. Analysis of a sample of the compound indicates that it contains 0. 606g n and 1. 390g o. Find its molecular formula.
The molecular formula of the compound is NO2, with one nitrogen atom and two oxygen atoms.
What is molecular formula?The molecular formula of a compound can be determined by its molar mass and the ratio of the elements it contains. To calculate the molecular formula, we must first calculate the moles of nitrogen and oxygen present in the sample. We can do this by dividing the masses of nitrogen and oxygen by their respective molar masses, which are 14.0067 g/mol for nitrogen and 15.9994 g/mol for oxygen.
N = 0.606 g / 14.0067 g/mol = 0.0433 mol
O = 1.390 g / 15.9994 g/mol = 0.0868 mol
Next, we must calculate the ratio of nitrogen to oxygen atoms in the compound. We can do this by dividing the moles of nitrogen by the moles of oxygen:
N:O = 0.0433 mol / 0.0868 mol = 0.5
Now, we can use the molar mass of the compound (92 g/mol) and the ratio of nitrogen to oxygen (0.5) to calculate the molecular formula.
Molecular formula = (N x 14.0067 g/mol) + (O x 15.9994 g/mol)
Molecular formula = (0.5 x 14.0067 g/mol) + (0.5 x 15.9994 g/mol)
Molecular formula = (7.00335 g/mol) + (7.9997 g/mol)
Molecular formula = 14.003 g/mol = 14 g/mol
Therefore, the molecular formula of the compound is NO2, with one nitrogen atom and two oxygen atoms.
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this type of chemical initiates irreversible alterations
Corrosive chemicals initiate irreversible alterations.
Corrosive substances are exceptionally reactive substances which have the potential to cause irreversible, visible destruction to any living tissue at the point of contact (due to the chemical reaction that takes place at that point of contact). They can be solid, liquid or gaseous and can result in severe life changing alterations on important body parts such as the sense organs (such as eyes, skin, etc). They will start dissolving flesh the moment they come in contact with skin, leaving burns behind. Corrosive chemicals can seriously harm people when they come into contact with their eyes, including corneal damage and even blindness. Highly acidic and highly basic chemicals (having extreme pH) are the most potent corrosive agents. Apart from damage to humans, they have the potential to harm property and environment since they can deteriorate certain materials, including steel and stone. If corrosive chemicals leak or spill, they can also ruin machinery and property. This might apply to fleet vehicles that transport chemical items, buildings where corrosives are kept, or instruments and equipment that come into touch with spilled material.
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298 g of BaSO4
express your answer using three significant figures
298 g of BaSO4 is the mass of Barium Sulfate which is expressed using three significant figures.
Explain about Barium Sulfate:Significant figures are the digits in a measurement that are known with certainty, plus one last digit that is uncertain. In this case, the number 298 is made up of three significant figures, which are 2, 9, and 8.The use of significant figures helps to communicate the level of precision or uncertainty in a measurement. In scientific or technical work, it is important to use the correct number of significant figures in order to indicate the precision of a measurement and to avoid errors in calculations.When working with measurements, it is important to be consistent with the number of significant figures used throughout your calculations. When you perform mathematical operations on measurements, the result should have the same number of significant figures as the measurement with the least significant figures.In this case, 298 g of BaSO4 is a precise measurement, with three significant figures. It is important to keep this same number of significant figures in any further calculation that involves it.To learn more about significant figures refer to:
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a small cylinder of oxygen contains 300.0mL of gas at 15 atm. What will the volume of this gas be when released into the atmosphere at 0.900atm?
Under pressure, oxygen is contained in oxygen cylinders, and as the cylinder is used down, the pressure gauge steadily decreases.
What is the capacity of small oxygen cylinder?A small cylinder called the D size, which can contain 340 litres of oxygen at 13 700 kPa, is frequently fastened to the side of an ambulance stretcher. With an integrated valve and 460 litres of capacity at 23 000 kPa, the CD size is a more recent variation of the D.The small, transportable E cylinder, which has a volume of 0.68 m3 and weighs only 7 kg, is one of the sizes available for industrial oxygen cylinders.Three sizes of medical oxygen cylinders are offered. Small (.4 m3) is referred to as A size, Medium (1.6 m3) as D size, and Large (2.5 m3) as E size.The patient's oxygen saturation rises by 3–4% for every liter/minute of oxygen. There are 21% oxygen molecules in room air. In this case, a patient receiving 4 L/min of oxygen.To learn more about oxygen refer to:
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what is the total concentration of ions in a 565.1940 mm solution of liclo4? express your answer in units of millimolarity (mm) using at least three significant figures
The total ion concentration is the sum of the individual ion concentrations. Thus for the 1 M NaCl, the total ion concentration is 2 M; for the 1 M CaCl 2, the total ion concentration is 3 M.
Define millimolarity?
The words "millimolar" and "micromolar" refer to mM and μM (10-3 mol/L and 10-6 mol/L), respectively.mmol/l = (mg/dl x 10) ÷ mol wt)Mass and Weight, Volume, Flow and Flux.Electrochemical Equivalence.Milliliter is used to measure a small amount of liquid. For a larger quantity of liquid, you can use liters. 1 liter = 1000 milliliters or 1 ml = 0.001 l. You can represent milliliter as ml or mL.Some medical tests report results in millimoles per litre (mmol/L). A mole is an amount of a substance that contains a large number (6 followed by 23 zeros) of molecules or atoms. A millimole is one-thousandth of a mole.
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Part of which generalized New York State landscape region is drained by
the Susquehenna River and its tributaries?
Mid-Atlantic region generalized New York State landscape region is drained by the Susquehenna River and its tributaries
What landscape region is the Susquehanna River located in?The Susquehanna River (/sskwhaen/; Lenape: Siskwahane) is a significant river that runs across the Mid-Atlantic area of the United States, where it crosses the lower Northeast and the Upland South. The longest river on the East Coast of the United States, it is 444 miles (715 km) long.It originates in Otsego Lake in the heart of New York State and travels over the Appalachian Plateau in Maryland, Pennsylvania, and New York before emptying into the Chesapeake Bay's entrance at Havre de Grace in Maryland.The Susquehanna River Basin is the name of the basin around the Susquehanna River.To learn more about Susquehenna River refer to:
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How many miles of NaH are there in this reaction
0.000285 moles of NaH are there in this reaction.
What is molarity?A chemical species' concentration in a solution, specifically the quantity of a solute per unit volume of solution, is measured by its molar concentration. The number of moles per litre, denoted by the unit sign mol/L or mol/dm3 in SI units, is the most often used unit denoting molarity in chemistry.The moles of solute per litre of solution is measured as molarity. For instance, when table salt is dissolved in water, water serves as both the solution and the solute. Sodium chloride weights 58.44 grammes per mole. One molar solution, or 1M, is created by dissolving 58.44 grammes of sodium chloride in one litre of water.Given data :
SImply put, a 1-M solution will have 1mole of solute dissolved in 1 liter of solution.
Now, you know that your solution has a molarity of 0.150 M and a volume of 19.0 mL
Since the volume is much smaller than 1 L
, you can expect to have fewer moles of sodium hydroxide in this sample than you would have had in a full liter of solution.
Convert the volume of the sample from mililiters to liters by using the conversion factor
1 L = 10³ mL
to get
19 ml = 1 L / 10³ ml
= 19.[tex]10^{-3}[/tex] L
This means that the number of moles of solute you get in this sample will be equal to
c = n/V ⇒ n = c ⋅ V
n = 0.150 [tex]\frac{moles}{L}[/tex] x 19.[tex]10^{-3}[/tex] L = 0.000285 moles NaOH
Completed question :
How many moles of NaOH are present in 19.0 mL of 0.150 M NaOH?
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What is the change in entropy of the system when the flask of hexanes is boiled?
The change in system entropy when the hexane flask is boiled is positive.
Entropy is the process of changing or transforming a system towards disorder. Entropy is given the symbol S and has units of J/K or J/K mols. The amount of entropy always increases or remains constant, so every time the entropy increases, the disorder will be higher.
The entropy value in each process is always greater than zero (positive) and the amount in the universe continues to increase because it accumulates. In molecular reflection, an increase in entropy of a substance means an increase in molecular disorder or is called the degree of disorder of a substance.
So, the entropy change in the boiling hexane system is positive.
This question is multiple choice:
a. negative
b. zero
c. positive
The correct answer is C.
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Can someone explain how Acid rain occur?
Fuel combustion generates gases that combine with oxygen in the air and water vapor to make acids that eventually fall as rain on the earth's surface. Acid rain is one of the consequences of air pollution.
What is acid rain ?
Acid rain is the result of a chemical process that starts when gases like sulphur dioxide and nitrogen oxides are discharged into the atmosphere. These substances have the ability to ascend very far into the sky, where they combine and react with oxygen, water, and other chemicals.
Due to air pollutants, the excessive levels of sulphur dioxide and nitrogen dioxide emitted by cars and manufacturing operations, acid rain is made up of highly acidic water droplets.
Thus, Acid rain is one of the consequences of air pollution.
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2. Using your examples, compare solids, liquids, and gases in terms of the following characteristics: structure, compressibility, shape, and volume. (4 points) Imagine that you have a sample of each material in front of you that you can examine, and then describe how one characteristic compares across all three samples.
According to the forces of attraction, solids have negligible compressibility, rigid shape,definite volume while liquids have low compressibility,take shape of container and volume , gases have high compressibility, do not have any shape and can occupy large volumes.
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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What is the freezing point, in °C, of a 0.407 m solution of C5H4 in benzene?
Answer: 3.416
Explanation:
Answer:
3.396 °C
Explanation:
You want to know the freezing point of a 0.407 m solution of C₅H₄ in benzene.
Freezing point depressionThe amount of depression of the freezing point is calculated from ...
[tex]\Delta T_f=i\cdot K_f\cdot m[/tex]
where i is the van't Hoff factor, Kf is the freezing point depression constant, and m is the molality of the solution. The van't Hoff factor depends on the dissociation of C₅H₄ in benzene solution. There isn't any dissociation, so the van't Hoff factor value is i = 1.
BenzeneThe freezing point depression constant for benzene is 5.12 K/molal. This means the amount of freezing point depression of the benzene will be ...
[tex]\Delta T_f=1\cdot(-5.12\text{ K})\cdot0.407\approx-2.084\text{ K}[/tex]
The freezing point of pure benzene is 5.48 °C, so the depressed freezing point is ...
5.48 °C -2.084 = 3.396 °C
The freezing point of the solution is about 3.396 °C.
Why is mole Class 11?
The mole is the unit of the amount of the substance in the SI units. a mole of the substance is equals to the 6.022 × 10²³ particles.
The moles of the substance is determine by the following formula :
The number of the moles = mass / molar mass
n = m / M
The 1 mole of the substance = 6.022 × 10²³ atoms.
The 6.022 × 10²³ is the Avogadro's number. The symbol of the Avogadro's number is Na. The symbol of the mole is mol. The mole is equals to the 6.022 × 10²³ molecules or the ions.
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Which gas has recently increased in the mesosphere?
In the mesosphere, methane levels have recently increased, leading to an increase in liquid water, which has produced high-altitude storms that may be seen at night.
Describe the mesosphere.
The third layer of the atmosphere, the mesosphere, is just above the stratosphere and under the thermosphere. In the mesosphere, temperature decreases with increasing altitude.
Recent increases in methane in the mesosphere have increased the amount of liquid water there, which has led to the development of high-altitude storms that are visible at night.
A chemical molecule with the formula is methane.
As methane and water levels rise, chemical heating and UV light absorption lead the upper mesosphere and thermosphere to warm.
Natural gas mostly consists of the hydrocarbon methane (CH4). Methane is a greenhouse gas (GHG), and as such, its presence in the atmosphere has an impact on the planet's temperature and climate.
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1. Alkene A (88.24% C, 11.76% H) reacts with diatomic gas G to give product P). Alkene A
also reacts with gas Q in the presence of a catalyst C to give hydrocarbon H, which has
relative molecular mass 70. Oxidation of gas G gives element E, which makes an orange
solution in cyclohexane. H and E react in the presence of UV light to make a mixture of products including product P and another product Z, which could also be made by
reacting A and E directly.
i.
Draw a reaction scheme to organise the information above.
ii. Use the information to identify substances A, C, E, G, H, P, Q, and Z.
[21]
H2 and alkenes.With the aid of H2 and a metal catalyst like Pt, Pd, Ni, or Rh, alkenes can be converted into alkanes.
What alters an alkene does H2 PD do? H2 and alkenes.With the aid of H2 and a metal catalyst like Pt, Pd, Ni, or Rh, alkenes can be converted into alkanes.From H atoms taken up by the metal surface, the two new C-H bonds are created simultaneously.The reaction only produces the syn addition product and is stereospecific.With the addition of a hydrogen molecule to the double bond, each carbon atom binds with one hydrogen atom during the reaction of alkenes with hydrogen gas in the presence of various metal catalysts.Hydrogenation is a term used to describe such an addition process.Processes like hydrogenation are an illustration of an alkene addition reaction.An alkene undergoes a hydrogenation reaction, which produces a saturated alkane by adding two hydrogen atoms across the double bond.To learn more about alkenes refer
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Is nitrogen and oxygen ionic bond?
No, Nitrogen and oxygen are joined by covalent bonds, which are produced when electron pairs are shared. The electronegativity of nitrogen is 3.0, while that of oxygen is 3.5.
An electron exchange that results in the creation of electron pairs between atoms is known as a covalent bond. Bonding pairs or sharing pairs are the names given to these electron pairs. Covalent bonding is the process by which the attractive and repulsive interactions between atoms reach a stable equilibrium. Each atom can reach the equivalent of a full valence shell because electrons are shared among multiple molecules, leading to a stable electronic state. Covalent bonds are substantially more frequent than ionic bonds in organic chemistry.
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How many moles of o2 is required in the combustion reaction of methane CH4?
2 moles of oxygen is required in the combustion reaction of methane CH₄.
A combustion reaction is a chemical reaction in which a fuel undergoes oxidation by reacting with an oxidizing agent, resulting in the release of energy in the form of heat. It is generally exothermic redox reactions between an oxidant as well as fuel. The product formed in combustion reaction is usually the oxidizing fuel it is often reffered as smoke.
When quantities of a reactant are asked, always start with a balanced chemical equation.
CH₄ + 2O₂ → CO₂ +2H₂O
Therefore, 1 mole of methane requires 2 moles of oxygen for a complete combustion.
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Which describes the molecule shown below?
HIC-H
20000...ooooooooo
Н
HICICICIH
H-C-H
H-C-C-C-H
HISIH
H-C-H
A. Unsaturated alkene
B. Saturated alkane
OC. Unsaturated alkyne
D. Saturated alkene
The Unsaturated alkene describes the molecule shown below.so, option (a) is correct.
What is Unsaturated alkene ?
Unsaturated hydrocarbons are organic substances that are only composed of carbon and hydrogen atoms and have two or three bonds between two neighbouring carbon atoms.
Since alkene molecules contain a carbon-carbon double bond, which causes them to exhibit distinctive addition reactions, alkenes are also known as unsaturated hydrocarbons.
What is molecule ?
A molecule is a collection of at least two chemically bound atoms from the same or distinct elements. One molecule of water, for instance, is created when two hydrogen atoms and one oxygen atom combine.
Therefore, Unsaturated alkene describes the molecule shown below.so, option (a) is correct.
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What are the 4 main sources of non-renewable energy?
Oil, natural gas, coal, and nuclear energy are the four main categories of nonrenewable energy.
A source of energy that is not replenishable will eventually run out. Coal, gas, and oil are the main types of fossil fuels that are used as non-renewable energy sources. Coal, nuclear power, oil, and natural gas are nonrenewable energy sources with finite supplies. This is typically caused by how slowly they are replenished. Renewable resources are naturally replenished over a brief period of time. Gas, coal, and oil are a few examples of non-renewable energy sources. Solar, wind, and geothermal energy are examples of renewable energy. Natural gas, coal, and other non-renewable energy sources are some examples. These sources are in short supply and are becoming scarce.
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What is the relationship between the melting points of impure substances and pure substances?
Answer:
Impure substances tend to have a slightly lower melting point than the pure substance.
Explanation:
How many moles are in 525 g Ca?
This is how many grams there are in 525 grams of calcium. One mole of calcium weighs 13.099 grams.
What is meant by calcium?Chemical element calcium has the atomic number 20 and the letter Ca as its symbol. At room temperature, calcium is a solid and is categorized as an alkaline earth metal.The fifth element in the periodic table and the third most prevalent metal in the earth's crust is the chemical element calcium (Ca), which has the atomic number 20. Trimorphic in nature, the metal is softer than aluminum yet harder than sodium. It doesn't produce skin burns, unlike alkaline metals like beryllium and aluminum, as well as beryllium.The protons/electrons and neutrons in a calcium atom total to 20 each. In addition, calcium's chemical characteristics include a cubic crystal structure, a white silvery appearance, and a density of 1.55 g/cm3 at 293 K. With a total of 2, 8, 8, and 2 electrons in each of its four energy levels, calcium.To learn more about calcium refer to:
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What is the boiling point, in °C, of a 1.33 m solution of C6H14 in benzene?
The change in boiling point of the solution rom the solvent is 3.545 °C. Then the boiling point of the solution is 83.62 °C.
What is boiling point ?Boiling point of a solution is the temperature at which it converts into its vapor state. The addition of a non-volatile solute leads to the elevation in boiling point of the solution.
The change in boiling point ΔT is related to the molality of the solution and molal elevation constant Kb of the solvent as follows:
ΔT = Kb m
Given that molality = 1.33 m
Kb of benzene = 2.65 °c/m
then ΔT = 2.65 °c/m × 1.33 m = 3.524 °C
Boiling point of pure benzene = 80.1 °C
Then boiling point of the solution = 80.1 + 3.524 = 83.62 °C
Therefore, the boiling point of the given solution is 83.62 °C.
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Your question is incomplete. But your complete question is as follows:
What is the boiling point, in °C, of a 1.33 m solution of C6H14 in benzene? Bp (benzene) = 80.1 °c Kb (benzene) =2.65 °c/m
select how benzophenone and benzaldehyde can be distinguished using ir only.
Benzophenone and benzaldehyde are distinguished because only one compound will show absorptions at 2820 and 2720 cm.
We know that the IR is one of the spectroscopic methods that we can be able to use to is identify compounds. The infra red technology is based on the fact that infra red radiation is able to cause the bonds to stretch or to bend. In the case of the compounds that we have here, there are benzophenone and benzaldehyde. The C=O stretch of the benzophenone at 2820 and 2720 cm −1 are unique and can only be seen in this compound.
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How could you distinguish between benzaldehyde (also called diphenyl ketone) and benzaldehyde using ir only?
determine the molarity of aqueous sucrose (c12h22o11) having an osmotic pressure of 25 atm at a temperature of 25 0c.
The molarity of aqueous sucrose (C12H22O11) having an osmotic pressure of 25 atm at a temperature of 25 0C is approximately 11.7 M.
To calculate the molarity, we can use the formula for osmotic pressure, which is given by: π = iMRT, where π is the osmotic pressure, i is the van't Hoff factor, M is the molarity, R is the ideal gas constant and T is the temperature in Kelvin. By rearranging the formula and substituting in the given values, we can solve for the molarity.
It is important to note that this calculation assumes that the solution is ideal, which means that the particles do not interact with each other, and that the van't Hoff factor is 1, which means that sucrose is a non-dissociating solute. In real solutions, the osmotic pressure can be affected by factors such as temperature and pressure, and the van't Hoff factor can be different from 1.
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What energy-storing molecule is broken down in the first step of cellular respiration?
Glucose is broken down in the first step of cellular respiration.
Glycolysis, the first stage of cellular respiration, takes place in the cell cytoplasm. It involves the splitting of glucose into two three-carbon molecules through a 10-step process divided into two phases. The first phase involves the division of a six-carbon sugar molecule, while the second phase extracts and stores energy in the form of ATP and NADH. These two phases are known as the energy investment and energy generation phases. The overall net energy gain from this process is two ATP.
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Can CO2 and H2O form hydrogen bonds?
CO2 forms hydrogen bonds with water but it's linear shape makes it nonpolar molecule. The polarity of the molecules indicates that they will dissolve in water.
How H2O and CO2 forms hydrogen bonds?Hydrogen atoms of the water molecules form hydrogen bonds with the lone pairs of oxygen atoms of carbon dioxide molecule. This allows water molecules to solvate carbon dioxide molecules, making carbon dioxide soluble in water.
In case of water, hydrogen bonds forms between neighboring hydrogen and oxygen atoms of the adjacent water molecules. Attraction between individual water molecules creates bond known as hydrogen bond.
Each water molecule forms two hydrogen bonds involving their hydrogen atoms plus two further hydrogen bonds utilizing hydrogen atoms attached to the neighboring water molecules.
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