41.8 g of water will change its temperature by 3 °C when 525 J of heat is added to it.
According to question:-
Change in temperature(ΔT) = 3.0 °C
Heat absorbed(Q) = 525 J
Formula to be used : Q = m.c. ΔT
where, m = mass of given substance and since value of c (specific heat capacity of substance) is not given in the question, I'm going to use the value : c = 4.184 J/g°C
Specific heat capacity is the amount of heat absorbed to increase the temperature of 1kg of substance by 1 °C (or 1 kelvin).
Putting the values in the formula, we get:-
525 J = m × 4.184 J/g °C × 3.0°C
525 J = m × 12.552 J/g
m = 525 J/ 12.552 J/g
m = 41.8 g
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How many pairs are in CH4?
The valence shell of carbon contains four electrons. Each of these electrons are shared with a hydrogen atom. Consequently, the carbon and hydrogen atoms in the methane (CH4) molecule share four electron pairs.
The CH4 molecule does not contain an unshared pair of electrons.Due to the fact that carbon has a valence of 4, it can only make a maximum of 4 bonds with other atoms. Since the hydrogen only has one electron, it can only create one bond. Here, one electron from each hydrogen atom and each of the four valence electrons of carbon are shared, generating four sigma covalent connections. As a result, all of the valence electrons on carbon and hydrogen participate in the creation of the bond and no unshared pair of electrons is left.
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Do CO2 and H2O react?
Carbon dioxide dissolves in water and reacts with water to produce carbonic acid.
What happens when CO2 and H2O react?When CO2 dissolves in water, a small portion of it reacts quickly to create carbonic acid. The result of this is a partial dissociation of the substance into hydrogen, bicarbonate, and carbonate ions. CO2 keeps dissolving up until equilibrium is established.
An example is sealed bottle of soda water, which has carbonic acid. As you break the seal, pressurized gas containing CO2 escapes. To reestablish equilibrium pressure of CO2, reverse reaction takes place, decomposing some of H2CO3 and bubbling out CO2. Therefore, your carbonated soft drink fizzes.
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Double Replacement Net Ionic Equation: write the net ionic
equation for the following double replacement reactions.
NaOH + MgBr2 2MgH + 1NaOBr2
The net ionic equation for the following double replacement reactions is Mg²+[tex]\rightarrow[/tex]2 Mg as all the ions present on reactant and product side which will get cancelled.
What is ionic equation?Ionic equation is defined as a chemical equation which represents electrolytes in aqueous solutions and are expressed as dissociated ions. Ions present in aqueous solutions are stabilized by ion dipole interactions with the water molecules which are present.
An ionic equation can be written for any electrolyte which dissociates and reacts with the polar solvent. In a balanced ionic equation , number and type of atoms on each sides of reaction arrow are same. Even the net charge on both sides of the arrow is same.
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what are compounds that contain ionic bonds called?
A smallest part of the compound that can have the independence existence and that can retain all the properties of that compound is called as molecule.
Yes, the statement is True, A molecule is the smallest part of a compound that can exist independently and retain all the properties of that compound.
It is the basic unit of a chemical substance and can be composed of one or more atoms. The atoms in a molecule are held together by chemical bonds, such as covalent bonds, which can be either single, double or triple bonds, depending on the nature of the atoms and the compound. The properties of a molecule are determined by the type and arrangement of the atoms in it, as well as the nature of the chemical bonds holding them together. Understanding the properties of a molecule is an important aspect in many areas of science, including chemistry, biochemistry, and materials science.
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A smallest part of the compound that can have the independence existence and that can retain all the properties of that compound is called as molecule. State True or False.
How many hydrogen atoms are in each methane molecule CH4 )?
There are 4 hydrogen atoms in each methane having chemical formula CH4.
The 4 hydrogen atoms in Methane is clicked with a single carbon snippet by single bond. In the structure of Methane 4 sigma bond is present so the sp3 hybridisation can be seen in CH4 .The bond length between 4 hydrogen- carbon snippet is 109 pm. It's the simplest of saturated hydrocarbons with a chemical formula CH4. It consists of four hydrogen tittles and one carbon snippet and is the simplest alkane. When natural methane reaches the face of the atmosphere is called atmospheric methane and can be set up under the seafloor as well as below the ground.
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an atom that contains ten protons and ten electrons is likely to
An atom which contains ten protons and ten electrons is likely to be chemically inert or stable.
An atom has 10 electrons. Its electronic configuration is 1s² 2s² 2p⁶. The last level of the configuration gives us the information about the period in which the element is and the sum of the electrons in the last level gives us information about the group in which the element is. This element belongs to the Period 2 and Group 2 + 6 = VIIIA (18) as per the configuration. This group corresponds to the group of the noble gases or inert gases so the element is expected to be chemically inert because its valence shell is complete with 8 electrons.
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I'm genuinely confused , pleas explain:
More than 100 years after Fredrick Mohs developed the Mineral Hardness Scale, Robert Smith and George Sandland invented the Vickers Hardness Test for metals. Which scientist(s) correctly used science to develop their scale?
Answer:
Fredrick Mohs
Explanation:
Its just right G
A radioactive isotope started with a mass of 345 grams. What mass of the isotope will remain after seven half-lives?
The mass of the isotope that will remain after seven half-lives is 2.69 grams.
What is half life?Half -life of a substance is defined as the time which is required for half of the quantity of a radioactive substance to get decayed.It is a term which is used in nuclear chemistry for describing how quickly unstable atoms undergo radioactive decay into other nuclear species by emitting particles or the time which is required for number of disintegrations per second of radioactive material to decrease by one half of its initial value.
After 1 st half life:345/2=172.5 g
After 2 nd half life:172.5/2=86.25 g
After 3 rd half life:86.25/2=43.12 g
After 4 th half life:43.12/2=21.56 g
After 5 th half life:21.56/2=10.78 g
After 6th half life:10.78/2=5.39 g
After 7th half life:5.39/2=2.69 g
Thus, the mass of the isotope that will remain after seven half-lives is 2.69 grams.
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What state of matter is a sample at 1.0 atm and 85C
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the correct option is option B.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. In the given phase diagram, region C represents gas phase.
Therefore, the correct option is option B.
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Answer: A. Liquid
Explanation:
experiment 4: in the double-displacement reaction, which observation describes what happened when the contents of the two beakers were mixed?
When the two beakers were mixed, then: The color of the mixture changed.
When the contents of the two beakers were mixed, a double-displacement reaction occurred. Double-displacement reactions often result in the formation of two new compounds, each with different colors than the original reactants. As a result, the color of the mixture would change to reflect the formation of the two new compounds.
Double-displacement reactions involve two reactants exchanging ions with each other. When two reactants are mixed, they form two new compounds, each with different properties than the original reactants. In a double-displacement reaction, the reactants exchange ions, leading to the formation of two new compounds. This exchange of ions can cause a change in the color of the mixture.
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A 13. 5 liter balloon is heated from 248 K to 324 K. What will its new
volume be?
The new volume of the balloon will be determined by the Ideal Gas Law.
What is Ideal Gas Law?The Ideal Gas Law is a mathematical equation used to describe the behavior of an ideal gas under a given set of conditions. It states that, at a constant temperature and pressure, the pressure, volume and amount of gas present are all directly proportional.
This law states that the product of the pressure, volume, and temperature of a gas is a constant.
Since the pressure of the balloon remains constant, the new volume is inversely proportional to the temperature.
Therefore, the new volume can be calculated by dividing the original volume (13.5 liters) by the ratio of the original temperature (248 K) to the new temperature (324 K),
which is 248/324 = 0.76.
The new volume of the balloon is then 13.5 liters / 0.76 = 17.76 liters.
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Consider a process that occurs at constant volume. The initial volume of gas is 2. 30 L , the initial temperature of the gas is 26. 0 °C , and the system is in equilibrium with an external pressure of 1. 2 bar (given by the sum of a 1 bar atmospheric pressure and a 0. 2 bar pressure due to a brick that rests on top of the piston). The gas is heated slowly until the temperature reaches 51. 2 °C. Assume the gas behaves ideally, and its heat capacity at constant volume is: CV,m=14. 2J/(K. Mol)Part AWhat is the value of w? (J)Part BWhat is the value of q? (J)Part CCalculate ΔUPart DCalculate Δ H. Remember the definition of enthalpy: H=U+pV, which applied to a process becomes ΔH=ΔU+Δ(pV)
A: The work (w) done by the system is equal to 0 J, as this process occurs at constant volume.
B: The heat (q) absorbed by the system is equal to 6660 J.
C: The change in internal energy (ΔU) is equal to 6660 J.
D: The change in enthalpy (ΔH) is equal to 6660 J, as the change in pressure-volume work is equal to 0 J in a constant volume process.
Part A: The work (w) done by the system can be calculated using the equation w = -pΔV. As the process occurs at constant volume, the change in volume (ΔV) is equal to 0. Therefore, w = 0 J.
Part B: The heat (q) absorbed by the system can be calculated using the equation q = ΔU + w. As the work done by the system is equal to 0 J (calculated in Part A), the heat absorbed by the system can be calculated as q = ΔU.
The change in internal energy (ΔU) can be calculated using the equation ΔU = nCvΔT, where n is the number of moles of gas and Cv is the molar heat capacity at constant volume.
Using the given values, we can calculate the number of moles of gas as n = PV/RT, where P is the pressure, V is the volume, R is the gas constant, and T is the temperature.
Therefore, n = (1.2 bar x 2.30 L) / (8.314 J/K.mol x 298.2 K) = 0.0316 mol.
Plugging this value into the equation for ΔU, we get ΔU = 0.0316 mol x 14.2 J/K.mol x (51.2°C - 26°C) = 6660 J.
Part D: The change in enthalpy (ΔH) can be calculated using the equation ΔH = ΔU + Δ(pV). As the process occurs at constant volume, the change in pressure-volume work is equal to 0 J. Therefore, ΔH = ΔU = 6660 J.
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the process by which the atoms of one or more substances are rearranged to form different substances is called a
The process by which the atoms of one or more substances are rearranged to form different substances is called a chemical reaction.
The manner of reorganizing atoms via way of means of breaking one set of chemical bonds and forming a brand new set is called a chemical reaction. A chemical change is a change in count wherein the materials that make up that count change into materials with specific chemical and bodily properties. In a chemical change, additionally known as a chemical reaction, atoms rearrange to shape new materials, which ends up in specific bodily properties, as well.
Thus, the process is known as chemical reaction.
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Select the meaning of the letters FT in the acronym FTIR.
Fourier transform
The meaning of the letters FT in the acronym FTIR is Fourier transform. It is a mathematical model that aids in converting signals between two distinct domains.
Fourier Transform Infrared Spectroscopy or FTIR Analysis or FTIR spectroscopy is a method used to distinguish between organic, polymeric, and, occasionally, inorganic materials. This method test materials and examines chemical characteristics using infrared light.
A sample is exposed to infrared light from the FTIR instrument that ranges in wavelength from 10,000 to 100 cm⁻¹. Some of the light is absorbed and part of which passes through the sample. The sample molecules then transform the absorbed light radiation into rotational and/or vibrational energy. The resulting signal at the detector appears as a spectrum.
Therefore, the FT in FTIR is referred to as Fourier transform.
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What is the mole fraction of water in methanol when 18 grams of h2o is added to 32 grams of methanol, ch3oh? group of answer choices
0.36 is the mole fraction of water in methanol when 18 grams of h2o is added to 32 grams of methanol, ch3oh.
What is the mole ?
The mole is a unit of measurement used in chemistry to measure the amount of a substance. It is defined as the amount of a substance that has 6.02214076×1023 (Avogadro’s constant) of particles, such as atoms, molecules, or ions. It can be used to measure the mass of a substance, the volume of a substance, or the number of particles in a given amount of a substance. This unit is often used to measure the amount of chemical reactants and products in a reaction, as well as to balance chemical equations. The mole is also used to calculate concentrations of solutions, and to calculate the amount of energy released or absorbed in chemical reactions.
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According to the data in the table one effect of injecting vitamin b into chicken egg is that it
According to the data in the table, one effect of injecting vitamin B into the chicken eggs is that it increases the number of eggs hatching on the 21st day. The correct option is 3.
What is vitamin B?Vitamin B supports the functions of several enzymes, including those that release energy from fat and carbohydrates, break down amino acids, and transport oxygen and nutrients that contain energy throughout the body.
At hatching, the 21st day's hatchlings were all weighed and measured. So, by vitamin B, the number of eggs hatching will increase.
Therefore, the correct option is 3) increase the number of eggs hatching on the 21st day.
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The question is incomplete. Your most probably complete question is given below:
In an experiment using chicken eggs, 100 fertilized eggs
were injected with a saline (salt) solution containing vitamin B
during day 1 of their incubation period. At the same time, a
second group of 100 fertilized eggs was injected with a plain
saline solution. All the chicks that hatched on the 21st day
were weighed and measured at hatching. The results are
recorded in the data table below.
According to the data in the table, one effect of injecting
vitamin B into chicken eggs is that it:
1) changes the amount of yolk stored in the egg
2) produces larger eggs
3) increases the number of eggs hatching on the 21st
day
4) increases the incubation period
Does oxygen and barium form an ionic compound?
Ionic bonds is also called electrovalent bonds because the bond is made between the atoms with opposite charges and the forces acting between them s electrovalent force. Ionic bonds of oxygen and barium is that they transfer two electrons per atom between them to make an ionic compound.
Ionic bond is the force that is generated between the two charged species and it is particular that one has excess of electrons and the other one has loss of electrons so that they can generate opposite charges between them in order to attract them to each other. this is the strongest force between the atoms. ionic bonds have the most attractive force in the atom and the most strong it. by this primary information, we can firmly consider that ionic bonds are called electrovalent bonds because the bond is made between the atoms with opposite charges and ionic bonds of oxygen and magnesium is that they transfer two electrons per atom between them to make an ionic bond.
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What is the product of SO2 o2?
The product of the sulphur dioxide [tex]SO_{2}[/tex] and the oxygen [tex]O_{2}[/tex] is sulphur trioxide. The chemical equation of the sulphur trioxide represent as [tex]2SO_{3}[/tex]
Count each type of atom in the reaction's reactants and products; if the same number of each atom occurs on both sides of the arrow, the reaction is balanced. We want the same number of each type of atom on both sides of the equation to determine the product. The coefficients are the only thing that changes. The numbers in front of the molecule are referred to as coefficients, and they should never be modified. To understand this, metals must be balanced first, followed by the reaction;
[tex]SO_{2}+O_{2}\to?[/tex]
The number of Iron atoms on the product and reactant sides is the same.
On the reactant side, there are one sulphur atom and three oxygen atoms. As a result, a two-coefficient must be placed in front of [tex]SO_{2}[/tex] in the reactant. Thus, it becomes the sulphur trioxide[tex](2SO_{3})[/tex].
[tex]2SO_{2}+O_{2}\to2SO_{3}[/tex]
Therefore, the chemical equation is [tex]2SO_{2}+O_{2}\to2SO_{3}[/tex].
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Does lead react with oxygen?
Yes, lead does react with oxygen to form lead oxides (which are ionic compounds).
Ionic compounds, themselves neutral in nature, are formed due to the formation of electrostatic linkages (called ionic bonds) between positively charged cations and negatively charged anions. Lead is a metal and oxygen is a non metal. They react to form oxides of lead (lead oxides) which are ionic copounds. Known oxides of lead are : PbO (lead monoxide), PbO2 (lead dioxide) and Pb3O4 (trilead tetroxide). In lead monoxide, lead is in +2 oxidation state. In lead dioxide, lead is in +4 oxidation state. In trilead tetroxide, average oxidation number of lead seems to be 8/3 , but the real oxidation state of would be different, as here, two lead molecules are linked in a molecule. Therefore, to know its oxidation state, we need to know its structure. Ionic bonds are formed by donation of electrons. In these cases, the metal - lead (Pb) donates electrons to Oxygen.
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Does 1 mole equal 6.022 x1023 particles atoms?
Yes , 1 mole equal 6.022 × 10²³ particles atoms. the value of the one mole is equals to the 6.022 × 10²³ atoms.
The number of the atoms in the 1 mole of the substance is given as below :
The number of the atoms in 1 mole = 6.022 × 10²³ atoms.
The number of atoms that is 6.022 × 10²³ atoms is called as a Avogadro's number. The Avogadro's number is the number of the units in the one mole of the any substance.
Thus, there are the 6.022 × 10²³ atoms called as Avogadro's number in the one mole.
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How many moles are there in 45.0 grams of sulfuric acid?
Answer:
0.458 moles
Explanation:
In this case, the number of moles of sulphuric acid will be 45.0 grams, divided by molar mass 98.08 grams per mole and we obtain 0.458 moles.
when stating the scientific name of an organism, which 2 levels of classifcatipn are included? provide an example
When stating the scientific name of an organism Generic name, Specific epithet are 2 levels of classifcatipn are included.
What two categorization levels are used to scientific names?The Binomial Naming System is a two-name system used by scientists. The system used by scientists to identify plants and animals defines the genus and species of the creature. The genus appears first, followed by the term species.Each species' scientific name consists of a particular name (generic epithet) and a generic name (specific epithet).The first part of the name refers to the name of the genus, while the second part refers to the species found in that genus. I warn you that the scientific name of an organism actually consists of three components, not just two, in order to be totally right, which is what the FAQ aspires to be at all times.To learn more about scientific name refer to:
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you have 5 molof liquid water (h2o). (a) what volume in liters is occupied by this amount of water? (b) how many molecules are in this amount of water? (c) what is the volume per molecule? (d) if, on average, the molecules are uniformly spaced, with each molecule at the center of a small cube, what is the length of an edge of each small cube. the cubes touch but do not overlap?
You have 5 mol of liquid water (H₂O). The volume that occupied by this amount of water is 90 m³. 3.011 x10²³ There are molecules are in this amount of water. volume per molecule is 3 x 10⁻²³ m³. The length of the edge of each small cube is "equal" to the diameter of a molecule.
The volume can be found using the following formula:
V = nM/P
where,
V = volume occoupied
n = no. of moles = 5 mol
M = molar mass = 18 g/mol
ρ = density of water = 1 g/m³
Therefore,
V = nM/P
V= (5moles x1 8g/ moles)/1 g/m³
V = 90 m³
Then we can find the amount of mole cule in this amount of water
number of molecule = moles x avogadro's number
number of molecule = 5 moles x 6.022 x 10²³ = 3.011 x 10 ⁻²⁴
then, we can find the volume of an individual molecule:
volume of individual molecule = volume of water/ number of molecule
volume of individual molecule = 90 m³/ 3.011 x 10 ⁻²⁴ =3 x 10⁻²³
This volume can be given as a volume of the sphere:
Vi =4/3πr²
3 x 10⁻²³ =4/3πr²
r = 4.15 x 10⁻⁷ m
Diameter = d = 2r = 2(4.15 x 10⁻⁷ m)
d = 8.3 x 10⁻⁷ m = 83 μm
since the cubes are adjacent to each other. Therefore, the diameter will be equal to the edge length.
Edge Length = L = d
L = 8.3 x 10⁻⁷ m = 83 μm
The molecule's diameter is the same as the edge length.
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what is the most likely ionization state of alanine at ph 11 ?
The alanine molecule has a net negative charge at pH 11, where the amine exists as a neutral base and the carboxyl serves as its conjugate base.
The amino acid alanine is necessary for the synthesis of proteins. Vitamin B-6 and tryptophan are broken down using it. It provides the central nervous system and muscles with energy. It helps the body use glucose and boosts the immune system.
The alanine chemical structure reveals that the backbone is made up of two functional groups: the carboxyl group (COOH C O O H) and the amino group (NH2 N H 2), as well as a carbon atom attached to the side chain, CH3 C H 3.
The majority of proteins contain a large amount of the glycogenic amino acid alanine. Alanine can also be produced from other amino acids, particularly branched chain amino acids (BCAA) like valine, leucine, and isoleucine.
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Is oxygen and sodium an ionic bond?
Yes, Oxygen and sodium have an ionic bond.
What is ionic bond?Ionic bonding, a type of chemical bonding that involves the electrostatic attraction between two atoms or ions with radically different electronegativities, is the primary interaction occurring in ionic compounds.
What type of bond do oxygen and sodium form?Since sodium is a component of an alkali and oxygen is merely a non-metal and a gas, an ionic connection is created. As an example, the reaction between sodium and oxygen can produce sodium oxide. Sodium atoms are converted into sodium ions to produce the ionic compound sodium oxide. Atoms of sodium undergo oxidation, which results in the loss of electrons.
Na + O2 → NaO2 or 4Na + O2 → 2Na2O (s).
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The compound dissolve in ocean water which is most needed by organisms that live there
The compound that dissolve in ocean water which is most needed by organisms that live there are oxygen (O2), carbon dioxide (CO2), and nitrogen (N2).
What are compounds?chemical compounds are described as any substance composed of identical molecules consisting of atoms of two or more chemical elements.
Oxygen is needed for respiration in marine plants, algae, and phytoplankton which is the primary producers and animals.
Carbon dioxide is then used by the primary producers to power photosynthesis which is a byproduct of which is oxygen.
Nitrogen gas dissolved in the ocean is fixed by bacteria and converted into the forms required for primary production, such as nitrate and nitrite.
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Which two practices are examples of how people use science?
M
A. Explaining natural events using facts and data
B. Developing theories using many lines of evidence
M C. Developing stories
that enhance culture and
share beliefs
I D. Explaining natural
events using myths and legends
SUBMIT QUICK
Explaining natural events using facts and data and developing theories using many evidences are examples how people use science. Thus, option A is correct.
What is hypothesis?Hypothesis is a fact that is needed to be proved. An explanation for a phenomenon is put up as a hypothesis. To be considered a scientific hypothesis, a proposition must be testable using the scientific method. Scientific hypotheses are frequently based on prior findings that the body of knowledge is unable to fully explain.
The action of working in science is to identify a problem, establish a hypothesis, collect information and interpret those information.
What is a theory?A theory is a fact that is already experimented and has a proof.
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which type of bond must be broken for water to vaporize? group of answer choices polar covalent bonds hydrogen bonds both hydrogen bonds and ionic bonds ionic bonds both polar covalent bonds and hydrogen bonds
During evaporation, for the water molecules to escape as gas, it needs to break hydrogen bonding between molecules.
Various special properties exhibited by water is due to the presence of hydrogen bonding. When in liquid form, hydrogen bonds are continuously formed and breaks when the molecules moves. Hydrogen bonds breaks as a result of kinetic energy which makes the molecules move in the system. As the temperature is increased kinetic energy increases and these hydrogen bonds are completely broken and escapes as water vapor.
It requires as much heat to break the hydrogen bonds, as much as increasing the temperature. Due to hydrogen bonds water has high specific heat capacity and also high heat of vaporization.
So to vaporize, hydrogen bonds between water molecules must be broken.
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At what temperature will objects have the same kinetic energy?
Answer:
Explanation: Kinetic energy is the energy of motion, so this makes sense – as things heat up, they move faster. All gases at the same temperature have the same average kinetic energy. A gas’s temperature is a measure of the average kinetic energy of its particles. So if two gases are at the same temperature, they must have the same average kinetic energy.