There are 62.48 grams in 1.42 moles of carbondioxide.
How to calculate mass?The mass of a substance can be calculated by multiplying the number of moles in the substance by molar mass.
Moles in chemistry is the International System of Units, the base unit of amount of substance i.e. the amount of substance of a system which contains exactly 6.022 × 10²³ elementary entities.
mass = no of moles × molar mass
According to this question, there are 1.42 moles of carbondioxide given. The mass of the gas can be calculated as follows:
molar mass of carbondioxide = 44g/mol
mass = 1.42 × 44 = 62.48g
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Calculate the decrease in temperature when 6.00 L at 20.0 °C is compressed to 4.00 L.
To calculate the decrease in temperature when 6.00 L at 20.0 °C is compressed to 4.00 L, we need to use the ideal gas law, PV = nRT.
How do you calculate temperature drop due to pressure drop?You subtract the final temperature from the starting temperature to find the difference. So if something starts at 50 degrees Celsius and finishes at 75 degrees C, then the change in temperature is 75 degrees C – 50 degrees C = 25 degrees C. For decreases in temperature, the result is negative.Use the formula: k = T1/P1. For example, if a gas at an initial temperature of 300 K and an initial pressure of 100 Pa, drops by 50 Pa, the proportionality constant k = 3 K/Pa = 300/100 = T1/P1. Multiply the drop in pressure by the proportionality constant k to obtain the drop in temperature.First, we need to convert the temperature from Celsius to Kelvin: 20.0 °C + 273.15 = 293.15 KNext, we need to find the initial pressure, using the ideal gas law: P1V1 = nRT, where P1 = initial pressure, V1 = initial volume, n = number of moles, R = ideal gas constant, T = temperature in Kelvin. We know that V1 = 6.00 L, T = 293.15 K, and R = 8.314 J/mol·K. We do not know the value of n, so we can assume it is 1 mole. Therefore, P1 = (nRT) / V1 = (1 x 8.314 x 293.15) / 6.00 = 476.89 J/LFinally, we can calculate the final pressure, using the same equation: P2V2 = nRT, where P2 = final pressure, V2 = final volume. We know that V2 = 4.00 L, T = 293.15 K, and R = 8.314 J/mol·K. Substituting these values into the equation, we get P2 = (nRT) / V2 = (1 x 8.314 x 293.15) / 4.00 = 715.34 J/LTo find the decrease in temperature, we subtract the final pressure from the initial pressure: P1 - P2 = 476.89 J/L - 715.34 J/L = -238.45 J/LSo the decrease in temperature when 6.00 L at 20.0 °C is compressed to 4.00 L is -238.45 J/L.To learn more about temperature refer to:
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a molecule that has a glycerol backbone, two fatty acid chains, and a phosphate-containing group
A phospholipid is a molecule that has a glycerol backbone, two fatty acid chains, and a phosphate-containing group.
Phospholipids are important components of cell membranes, and can be used to store energy and transport molecules across the cell membrane. Phospholipids are amphipathic, meaning they have both hydrophilic (water-attracting) and hydrophobic (water-repelling) regions.
This property makes phospholipids an important component of cell membranes, as it allows them to form a bilayer that separates the interior of the cell from its external environment.
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How do you find the number of carbon atoms in a compound?
The number of carbon atoms in the main chain of a certain compound is five because the aldehyde group (here acting as a substitute) and the double bond must be given the smallest number.
Therefore, the numbering starts with the group COOH and ends with the number CH3 which also includes the group CHO.
In the dehydration of secondary and tertiary alcohol, when there is a possibility of formation of two isomers, the hydrogen atom is preferentially eliminated from the number of hydrogen atom, This is Saytzeff’s rule.
Dehydrohalogenation of alkyl halides: It involves removal of halogen atom along with β-hydrogen atom on heating with alcoholic solution of potassium hydroxide
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what is the change in entropy of the system when the flask of hexanes is boiled?
negative zero positive
The change in entropy of the system when a flask of hexanes is boiled will be positive.
When a substance is heated, the molecules gain energy and move faster. This increases the disorder or randomness of the system, which leads to an increase in entropy. Boiling is a phase transition from liquid to gas, and during this process, the molecules of hexanes go from a relatively ordered state in the liquid phase to a more disordered state in the gas phase. Since entropy is a measure of disorder or randomness, the entropy of the system increases as the hexanes boil. Therefore, the change in entropy of the system when a flask of hexanes is boiled is positive.
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some ionic compounds do not dissolve in water because
Some ionic compounds do not dissolve in water because the ionic forces in these molecules are very high which creates high lattice energy. Due to this hydration decreases. That is why that do not dissolves in water.
The compounds are said to be ionic compounds when the bonds in the compound are formed by transfer of electrons. Then the ionic bonds forms and that is called as ionic compounds. The ionic compound containing carbonate, oxide, or hydroxide anion is insoluble. some sulfates like Barium sulfate, calcium sulfate are insoluble. Because in these ionic compounds the ionic forces in these molecules are very high which creates high lattice energy. Higher the lattice energy decreases the hydration which makes the ionic compound insoluble in water. They do not dissolve in water. Solubility depends upon the lattice energy and Hydration.
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The van't Hoff factor for MgCl2 is 2. 7.
What is the boiling point of an
aqueous solution that has enough
magnesium chloride added to create a
1. 0 molal solution.
Kpwater=0. 52°C/mole
Round answer to tenths,
Enter text here
The boiling point of an aqueous solution that has enough magnesium chloride added to create a 1. 0 molal solution is 100. 7°C.
What is aqueous solution?An aqueous solution is a mixture of two or more substances in which water is the solvent. The substances can be ions, molecules, or larger particles that are dissolved in the water. The solution can be composed of a single type of particle, such as a solution of salt in water, or it can contain multiple types of particles, such as a solution of sugar and salt in water. Aqueous solutions are very common in everyday life, such as in the preparation of drinks and food, in cleaning, in pharmaceutical products, industrial processes, and in nature.
This is calculated by multiplying the van't Hoff factor (2. 7) by the boiling point elevation constant (Kpwater = 0. 52°C/mole) to get 1. 404°C/mole. Then, multiplying the 1. 404°C/mole by 1 mol of MgCl2 yields 100. 7°C.
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If all of the bonding electrons in a molecule are bonded in two hybrid sp orbitals, which shape does the molecule most
likely have?
O linear
O tetrahedral
O trigonal planar
O trigonal pyramidal
Option A - Linear.If all of the bonding electrons in a molecule are bonded in two hybrid sp orbitals, the molecule most likely have linear shape.
An atom arrangement that is linear (less than a 180° angle) is referred to as a molecule. The centre atom of molecules with linear electron-pair geometries undergoes sp hybridization.
The two oxygen atoms are doubly linked to the carbon atom, which is the main atom of carbon dioxide. It can form bonds because it is tetravalent. The 180° angle formed by the electrons around the atom gives the molecule its linear molecular geometry.
A molecule is linear if it contains 2 bonds and 0 lone pairs. A molecule is trigonal planar if it contains 3 bonds but no lone pairs. A molecule is bent or angular if it contains 3 bonds and 1 lone pair.
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What is the freezing point, in °C, of a 0.407 m solution of C5H4 in benzene? FP (benzene) = 5.5 °C Kf(benzene) = 5.12 °C/m
The freezing point, in °C, of a 0.407 m solution in benzene is 3.42°C
How to calculate freezing point?Freezing point refers to the temperature at which a liquid freezes, and the solid and liquid phases are in equilibrium.
According to this question, a 0.407 m solution is in benzene solution. The freezing point of the solution can be calculated as follows:
∆T = K × m
Where;
K = freezing point constant∆T = freezing pointm = molality∆T = 5.12 × 0.407
∆T = 2.084°C
Freezing point in benzene = 5.5°C - 2.084°C = 3.42°C
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Answer:
b, d, -13.4
Explanation:
A 0.1 m solution is diluted by three orders of magnitude. what is the new concentration?
10^-4 M
10^-2 M
10^-5 M
10^-3 M
Upon dilution by three orders of magnitude, the new concentration is 10^-5 M.
Dilution is the process of reducing the concentration of a solution by adding more solvent (the substance that the solute is dissolved in) to it. This increases the total volume of the solution, but decreases the amount of solute present per unit volume. Dilution can be used to adjust the concentration of a solution to a desired level for a particular application.
When a solution is diluted by three orders of magnitude, the concentration of the solution is reduced by a factor of 10^3 or 1,000. This means that the molarity of the solution is reduced by a factor of 1,000.
To find the new concentration of the solution, we can divide the original concentration by 1,000.
The original concentration of the solution is 0.1 M (molar)
The new concentration of the solution is: 0.1 M / 1,000 = 0.0001 M
So, the new concentration of the solution is 0.0001 M or 10^-5 M after it is diluted by three orders of magnitude.
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What is the atom 1 of CH4?
The number of the atom in the 1 mole of the methane that is CH₄ is the 6.022 × 10²³ atoms.
Given that :
The number of the moles of the CH₄ = 1 mole.
The value of the 1 mole = the number of the atom presents exactly in the 12 g of the pure carbon atoms.
The number of the atoms in the 1 mole of the substances = 6.022 × 10²³ atoms.
Therefore, the number of the atoms present in the 1 mole of the the CH₄ is 6.022 × 10²³ atoms. The number is called as the Avogadro's no. The Avogadro's number = 6.022 × 10²³ .
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How do you write a reduction reaction?
The reduction reaction is the reaction in which the addition of the hydrogen takes place or the removal of the oxygen occurs.
The reduction reaction in simple terms defined as the removal of the oxygen or the addition of the hydrogen or the addition of the electropositive element. The removal of the electronegative element is also called reduction reaction. Some examples are given below :
N₂ + 3H₂ ---> 2NH₃SnCl₂ + 2HgCl₂ ---> SnCl₄ + Hg₂Cl₂ ZnO + C ----> Zn + COThe above are the some examples of the reduction reaction. The reactant which undergoes the reduction will act as oxidizing agent.
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What is the total number of atoms in ammonium hydroxide, nh4oh ?
There are total seven number of atoms in ammonium hydroxide, [tex]NH_{4} OH[/tex].
The solution represented by the formula [tex]NH_{4} OH[/tex] consists of large quantities of water and ammonia and smaller quantities of ammonium ion and hydroxide ion, OH−. The substances consist of atoms or molecules. it is important to measure their amounts accurately. mole is used to express the amounts of reactants and products of chemical reactions. One mole contains 6.02214076×10²³. This number is called Avogadro constant. It is also called as Avogadro's number. The molecular mass is said to be the mass of a molecule calculated as the sum of the mass of each atom in the molecule multiplied by the number of atoms of that element in the molecule.
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a compound is found to contain 53.70% iron and 46.30% sulfur. find its empirical formula.
The empirical formula for a compound which contains 53.70% iron and 46.30% sulfur is Fe₂S₃.
How to calculate the empirical formula of a compound?In any empirical formula matter, first we have to find the molar mass % of the elements in the compound. Then, change the % into grams. Next, divide all the masses by their molar masses. Continue to pick the smallest answer in moles from the previous step, and divide all the answers by that number. Last, the coefficients calculated in the previous step will become the subscripts in the chemical formula.
In this case, the moles of each element are:
Iron (Fe) = 53.70/55.86 = 0.96 moles
Sulfur (S) = 46.30/32.07 = 1.44 moles
Now, calculate the mole ratio by dividing each mole by smallest mole (0.96):
Fe = 0.96/0.96 = 1
S = 1.44/0.96 = 1.5
Next, multiply by 2 to remove decimal:
Fe = 1 * 2 = 2
S = 1.5 * 2 = 3
Thus, the empirical formula is Fe₂S₃.
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Does a reduction reaction gain or lose electrons?
A reduction reaction is a type of chemical reaction where a molecule or ion gains electrons.
This is the opposite of an oxidation reaction, which is when a molecule or ion loses electrons. During a reduction reaction, the electrons that are gained are typically taken from another molecule or ion, which is then oxidized.
In a reduction reaction, electrons are transferred from one chemical species to another. This can occur in a single stage or through several stages. For example, in a one-step reaction, a hydrogen ion bonds to another compound to form a more complex compound.
This is known as an addition reaction. In a multistage reaction, electrons are transferred from one chemical species to another through several steps. For example, an iron atom can be oxidized to form an iron ion, which in turn is reduced to form an iron atom.
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Glass has a hardness that is in the middle of the hardness scale What is the hardness of Glass
Hardness 9
Hardness 8
Hardress 5
tardress 10
The correct answer is option c. Glass has a hardness that is in the middle of the hardness scale. So, the hardness of Glass is 5.
Glass possess high hardness levels compared to many other materials. The majority of glass varieties are brittle in nature, which makes them susceptible to breaking. The high hardness level of glass is due to silicon dioxide's robust Si-O chemical bonds. Glass imperfections, like bubbles and such as surface flaws, like scratches, mostly affects glass strength that reduce it more as they do for other fragile materials.
The hardness of glass can be measured by "Mohs Test," that compares the "scratch hardness" of 10 reference minerals. A mineral's hardness is defined as a measure of its relative resistance to scratching. It is measured by scratching the mineral against another substance of known hardness on the Mohs Hardness Scale.
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Why is it called an ionic bond?
Answer:
Explanation:
An iconic bond is a bond that is considered to be a benchmark for its class or sector, and is widely recognized and widely followed by market participants. It is known for its high credit rating and considered as a safe investment. It is often considered as a "bellwether" in the bond market, meaning that it is seen as an indicator of the performance of a particular sector or market as a whole. The term "iconic" refers to the bond's status as a widely recognized and respected benchmark in the market.
4.
How is a chemical property both similar to and diferent from an
Intensive physical property?
Pls help
A chemical property is similar to an intensive physical property in that both are properties of a substance that do not depend on the amount of the substance present.
An intensive physical property is a property that is independent of the amount of material, such as its melting point or boiling point.
A chemical property, on the other hand, is a property that describes how a substance reacts with other substances, such as its flammability or reactivity. In addition, chemical properties are often related to the structure of a substance, whereas intensive physical properties are not.
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each student in a class placed a 2.00 g sample of a mixture of cu and al in a beaker and placed the beaker in a fume hood. the students slowly poured 15.0 ml of 15.8 m hno3(aq) into their beakers. the reaction between the copper in the mixture and the hno3(aq) is represented by the equation above. the students observed that a brown gas was released from the beakers and that the solutions turned blue, indicating the formation of cu2 (aq). the solutions were then diluted with distilled water to known volumes. question the students determined that the reaction produced 0.010 mol of cu(no3)2 . based on the measurement, what was the percent of cu by mass in the original 2.00 g sample of the mixture?
Copper mass percentage in the sample = 32%, Nitrogen dioxide is a gas generated by several metal-acid interactions that has some intriguing health consequences.
Nitrogen dioxide is a hazardous dark gas that causes respiratory issues. It is frequently created by high-temperature combustion in automobile engines. During rush hour in several cities in the 1970s, this pollution would pile up, causing public health problems.
As a result, several nations began implementing regulations requiring the installation of catalytic converters on automotive exhaust systems, which break down nitrogen dioxide into atmospheric nitrogen and oxygen.
Equation of the reaction producing Cu(NO₃) is given below:
Cu(s)+ 4HNO₃(aq) ---> Cu(NO₃)(aq) + 2NO₂(g) + 2H₂O(l)
From the equation of reaction, 1 mole of Cu(NO₃) is produced from 1 mole of copper. Therefore, 0.010 moles of Cu(NO₃) will be produced from 0.010 mole of copper.
Molar mass of copper = 64 g/mol
mass of copper = number of moles * molar mass
mass of copper = 0.01 mol * 64 g/mol = 0.64 g
Percentage by mass of copper in the 2.00 g sample = (0.64/2.00) * 100%
Percentage mass of copper in the sample = 32%
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Full Question ;
Each student in a class placed a 2.00-gram sample of a mixture of Cu and Al in a beaker and placed the beaker in a fume hood. The students slowly poured 15.0 mL of 15.8 M HNO3
(aq) into their beakers. The reaction between copper in the mixture and HNO3 is depicted above.
The students observed that a brown gas was released from the beakers and that solutions turned blue, indicating the formation of Cu2+. The solutions were then diluted with distilled water to known volumes. The students determined that the reaction produced 0.010 moles of Cu(NO3)2
. Based on the measurement, what was the percent of Cu by mass in the original 2.00-gram sample of the mixture?
A) 16%
B) 32%
C) 64%
D) 96%
4. State your opinion on the genetic engineering of human DNA for the purpose of changing the genes and traits in human embryos (early, developing babies)...AKA creating"designer babies".
The public view on gene editing vary between region and the purpose. Some thought that gene editing in babies make them intelligent and healthy. While some others believe as it is harmful.
What is gene editing ?Editing and coding in genetic sequences is to create desired characteristics is becoming common nowadays. The capacity of humans to modify DNA has been transformed by a new method known as Crispr.
Genetics is trying to determine whether a certain development has actually occurred, may occur in the future, or is pure fiction. Additionally, the current study's gene-modification method appears to be relatively constrained.
The researchers were taken aback by this since they had put a DNA template into the embryo and anticipated that, as is the case with gene editing in other bodily cells, the gene would duplicate that sequence into the clipped location.
However, the embryonic genome disregarded that model, indicating that a healthy DNA sequence from the other parent is necessary to correct a mutation on one parent's gene in an embryo.
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Why is CH4 called methane?
The name methane for CH₄ is proposed by the germen chemist. The name methane is the from the name methanol.
The methane , CH₄ is the colorless and the odorless gas. The is derived from the name methanol. The formula for the methanol is CH₃OH. The OH group is replaced by the one hydrogen atom and forms the methane , that is CH₄ .
The methane is the simplest form of the saturated hydrocarbon that is alkane. The methane is composed of the four hydrogen atoms and a carbon atoms. The four hydrogen atoms satisfy the valency of the carbon atom.
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You want to make a wire that has a resistance of 2. You use gold, which has a resistivity of 2. 44 × 10–8 m. The wire should have an area of 2 × 10–6 m2. What should the length of the wire be?
The length of the wire should be 164 m.
Electricity resistance is the characteristic of an electric circuit or a component of a circuit that converts electrical energy into thermal energy in the presence of an opposing electric current.
And resistivity is the characteristic property of an element, stated as
ρ = RA/l
where: ρ is resistivity, R is resistance, A is the cross-sectional area, and l is the length of the component.
as stated in the question:
ρ=2. 44 × 10–8 , R= 2, A= 2 × 10–6 m2
l= RA/ρ
=> l= (2*2 × 10–6)/2. 44 × 10–8 = 164 m
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PLSS I NEED HELP ASAP!!
The mass of NaCl generated is calculated as 85%/100% * 29.225 g = 24.84 g NaCl.
what is the balanced equation of the nacl ?
Let us begin by constructing a suitably balanced equation:
2Na (s) + Cl2(g) (s)
1 mol Na yields 1 mol NaCl
Molecular weight 23 g/mol Na
11.5 g Mol Na = 11.5 g / 23 g / mol = 0.5 mol Na
This will provide 0.5 mol NaCl.
NaCl molar mass = 23 + 35.45 = 58.45 g/mol
At 100% production, the mass of 0.5 mol NaCl = 0.5 mol * 58.45 g/mol = 29.225 g.
If the true yield is 85%, then:
The mass of NaCl generated is calculated as 85%/100% * 29.225 g = 24.84 g NaCl.
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a compound has a molecular mass of 147 g and its empirical formula is c3h5o2. what is the molecular formula of this compound?
The molecular formula of the compound having empirical formula [tex]C_{3} H_{5} O_{2}[/tex] is [tex]C_{6} H_{10} O_{4}[/tex] .
The chemical formula is a way of representing information about the chemical proportions of atoms that constitute a particular chemical compound or molecule. The molecular formula is a chemical formula that shows the number of different atoms present in a molecule. It give the kind and number of atoms of each element present in a molecular compound. The molecular formula is the same as the empirical formula in many cases. Empirical formula can be determined from the percent composition of a compound. To determine the molecular formula it is necessary to know the molar mass of the compound.
146g/mole = n× {3×12.011 + 5×1.00794 + 2×16.00} g/ mole
n = 2
So the molecular formula= 2×C3H5O2
=[tex]C_{6}[/tex][tex]H_{10} O_{4}[/tex]
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Summarizing your investigation using the Five-Column Chart. For my investigation I use Solid.
Answer:
The Five-Column Chart is a useful tool for summarizing your investigation. In the case of your investigation involving solids, the chart would include columns for Properties, Examples, Uses, Interactions and Special Characteristics. In the Properties column, you would list the physical and chemical properties of solids, such as shape, texture, melting point, boiling point and solubility. The Examples column would list examples of solids, such as metals, plastics and rocks. The Uses column would list the various uses of solids, such as in construction, engineering and medicine. The Interactions column would list how solids interact with each other, such as through adhesion, cohesion and friction. Finally, the Special Characteristics column would list any special characteristics of solids, such as their electrical conductivity or magnetic properties.
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What is oxidation and reduction Class 11 chemistry?
The process through which a reactant loses electrons during a chemical reaction is known as oxidation. Reduction refers to the process through which a reactant acquires electrons during a reaction.
Such a thing typically happens if an acid reacts with a metal. Oxidation describes the process through which a reactant loses electrons during a chemical reaction.
Adding oxygen or any electronegative element, or taking away hydrogen or any electropositive one, is what is meant by the term "oxidation" in Classical and earlier concepts. Adding hydrogen or another electropositive element, or getting rid of oxygen or another electronegative one, is what reduction is all about, according to the classical or older idea.
An example of oxidation is C + O₂→ CO₂
An example of reduction is N₂ + 3H₂ → 2NH3
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Which bond or force would you NOT expect to occur in the absence of water? A. Polar covalent bond B. Nonpolar covalent bond C. Hydrophobic clustering D. Hydrogen bonds
Hydrophobic clustering is a binding force that is not anticipated to develop in the absence of water. C is the right answer.
The propensity of nonpolar compounds, such as oils and fats, to collect and avoid contact with water is referred to as hydrophobic clustering. Water molecules are polar, which means they have a positive charge on one end and a negative charge on the other.
Nonpolar molecules lack this charge distribution and so interact poorly with water. There would be no polar/nonpolar interactions and hence no hydrophobic clustering if there was no water. Other forces, such as polar covalent bonds, hydrogen bonds, and nonpolar covalent bonds, may still be present.
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What is the number of nitrogen molecules that reacted with excess hydrogen to make 2x10^10 molecules of ammonia
a. 3x10^10
b. 1x10^10
c. 2x10^10
d. 5x10^10
The number of nitrogen molecules that reacted to the hydrogen to produces the 2 × 10¹⁰ molecules of ammonia is 1 × 10¹⁰ molecules.
The reaction is given below :
N₂ + 3H₂ ---> 2NH₃
The number of molecules of the ammonia = 2 × 10¹⁰ molecules
1 molecule of N₂ produces the 2 molecules of NH₃
The molecules of the nitrogen, N₂ = ( 1/2) × 2 × 10¹⁰ molecules
The molecules of the nitrogen, N₂ = 1 × 10¹⁰ molecules.
Thus, the molecules of the N₂ is1 × 10¹⁰ molecules. The correct option is b) 1 × 10¹⁰ molecules.
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Predict the product(s) of this reaction: (Don't worry about balancing)
C2H4 + O2
Explanation:
c2h4+3o2.........2co2+2h2o
what is the volume (in cm3) of a 31.1 g piece of metal with a density of 12.9 g/cm3? please remember to use significant figures.
The volume of the piece of metal would be 2.4 cm³.
To find the volume (in cm³) of a 31.1 g piece of metal with a density of 12.9 g/cm³, we can use the formula V = m/d, where V is the volume, m is the mass, and d is the density.
In this case, m = 31.1 g, and
d = 12.9 g/cm³.
Plugging this into the formula,
V= m/d
V= 31.1/ 12.9
we get, 2.4 cm³.
When using significant figures, the answer should be rounded to 2.4 cm³.
Volume is the measure of the amount of space an object or substance occupies. It is typically measured in liters, cubic meters, gallons, or cubic feet.
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A car travels 75 mi/hr. How many hours will it take to travel 837 km? (Pick the answer closest to the correct answer,
1. 61 km=1 mile)
6.93 hours are required to travel 837 km.
As given in the question, the speed of the car is 75 mi/hr.
The rate of change in an object's location over time, or the rate of change in position per unit of time, is known as its speed. Hence, car covers:
75 miles -> 1 hour.
As the conversion from 'miles' to 'km' is given as :
1.61 km = 1 mile
Using the unitary method:
75* 1.61 km -> 1 hour
1 km -> 1/ (75* 1.61) hours
837 km ->837/ (75* 1.61) hours = 6.93 hours.
Hence, 6.93 hours are required to travel 837 km.
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