Answer this question without using numbers from the book (or anywhere else!) ΔS for the following reaction is positive. True or false? 2 CO(g) + O2(g) => 2 CO2(g)
Answers
The statement "ΔS for the following reaction is positive" is true.
What is the entropy of system ?
This means that the entropy of the system increases during the reaction, and there is an increase in the number of possible arrangements of molecules.
However, to answer this question without using numbers from the book, we can say that the entropy of the products (2 CO2(g)) is greater than the entropy of the reactants (2 CO(g) + O2(g)). This is because the number of gas molecules increases from 3 to 4 in the products, and an increase in the number of gas molecules is usually associated with an increase in entropy.
Therefore, we can conclude that ΔS for the given reaction is positive, which means that the statement is true.
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Related Questions
discuss the final result if the ice you had in the calorimeter was actually at less than 0.0c?
Answers
If the ice in the calorimeter was actually at a temperature below 0.0°C, it would significantly affect the final result of the experiment. The reason for this is that the heat transfer between the ice and its surroundings, including the calorimeter, is based on the temperature difference. In this case, the ice would be at a lower temperature than anticipated, leading to an underestimation of the amount of heat transferred.
During the process of melting, heat is absorbed by the ice to convert it from a solid state to a liquid state. This process requires a specific amount of energy known as the heat of fusion. Normally, the ice is assumed to be at 0.0°C during this phase, as it is the temperature at which ice and water coexist in thermal equilibrium.
If the ice was actually at a temperature below 0.0°C, it means that it was already partially melted or in a supercooled state. As a result, the initial temperature recorded would be lower than expected. When heat is added to the system, it would first raise the temperature of the ice to 0.0°C, and then proceed to melt the ice. However, since the recorded temperature was already below 0.0°C, the apparent increase in temperature may be minimal or negligible.
Furthermore, the heat absorbed by the ice during the phase change from solid to liquid would also be affected. The heat of fusion is a well-defined value for ice at 0.0°C, but if the ice is below that temperature, it might deviate from the expected value. This could introduce additional errors in the calculations.
Consequently, if the ice in the calorimeter was actually at a temperature below 0.0°C, the measured heat transfer and the calculated values for the heat of fusion and specific heat capacity would be inaccurate. It is crucial to ensure accurate measurements and assumptions in such experiments to obtain reliable results.
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are chemical reactions always dangerous
Answers
Answer:
Sometimes they are and sometimes they are not
A cancer laboratory is estimating the rate of tumorigenesis in two strains of mice, A and B, denoted θ A
and θ B
, respectively. They have tumor count data for 10 mice in strain A and 13 mice in strain B. Type A mice have been well-studied, and information from other laboratories suggests that type A mice have tumor counts that are approximatelyPoisson distributed with a mean of 12 . Tumor count rates for type B mice are unknown, but type B mice are related to type A mice. The observed tumor counts for the two populations are: y A
=(12,9,12,14,13,13,15,8,15,6)
y B
=(11,11,10,9,9,8,7,10,6,8,8,9,7).
(a) (2 points) Assume the following prior distributions for the two types of mice: θ A
∼ Gamma(120,10) and θ B
∼Gamma(12,1). Plot the priors in R, and compare them. Explain how these distributions adequately depict the prior information available to the laboratory. (b) (2 points) Assume that θ A
and θ B
are independent of each other. Identify the posterior distributions for θ A
and θ B
(using derived results from class). Plot the posteriors in R, and compare them. (c) (2 points) Find the posterior mean, variance, and maximum a posteriori (MAP) estimates for θ A
and θ B
using known formulas. (d) (4 points) Use R to find 99% percentile-based and highest density region credible intervals for θ A
and θ B
. Why do the two credible interval procedures produce similar results? (Hint: use the HDInterval R package) (e) (4 points) Compute and plot the posterior expectation of θ B
under the prior distribution θ B
∼Gamma(12n 0
,n 0
) for each value of n 0
∈{1,2,…,50}. Describe what sort of prior beliefs about θ B
would be necessary in order for the posterior expectation of θ B
to be close to that of θ A
. (f) (2 points) In part (a), we assumed θ A
and θ B
are independent. Does this assumption make sense in this study? Explain your answer.
Previous question
Answers
Compute and plot the posterior expectation of θB under different prior beliefs.
Plot the prior distributions for θA and θB and explain their representation of prior information?The prior distributions for θA and θB are Gamma(120, 10) and Gamma(12, 1), respectively. Plotting these priors in R allows us to visualize their shapes and compare them.
The Gamma distribution is a flexible family of continuous probability distributions that is suitable for modeling positive-valued variables like tumor count rates.
The choice of parameters for the priors reflects prior knowledge about the mean and variability of tumor counts in each strain. Gamma(120, 10) indicates a higher mean and lower variability for strain A compared to Gamma(12, 1) for strain B. The prior distributions effectively capture the available prior information, allowing for different expectations and levels of uncertainty for the two strains.
Assuming independence between θA and θB, we can calculate the posterior distributions using the derived results from class.
The posterior distributions for θA and θB will also be Gamma distributions. The posterior parameters can be computed by adding the observed tumor counts to the prior parameters. Plotting the posteriors in R allows us to visualize the updated beliefs about the tumor count rates in each strain based on the observed data.
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(1) __________ are separated without any chemical reactions. There are many
different kinds of mixtures. Different mixtures are separated in (2)__________ ways.
Physical (3)__________ separates the components of varying sizes using a
spoon or any scooping material or by picking. The use of (4)__________ can be done
to separate the metallic materials from nonmetallic materials. (5)__________ is the
separation of an insoluble solid from a liquid mixture using a semipermeable
membrane like filter paper.
In decantation, the large particles of insoluble solid are separated from the
(6)__________ mixture. (7)__________ separates the soluble solid from the liquid
component of the solution by evaporating the liquid substance.
choices
magnet
mixtures
filtration
different
manipulation
evaporation
liquid
Answers
Answer:
1. Mixtures
2. Different
3. Manipulations
4. Magnet
5. Filtration
6. Liquid
7. Evaporation
how many electrons do noble gases have in their outer most level?
Answers
Noble gases have 8 electrons in their outermost level, except for helium, which has only 2 electrons.
Noble gases belong to Group 18 (VIII-A) of the periodic table, also known as the noble gas group or the Group 0 elements. The noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
In the outermost energy level of an atom, there is a maximum number of electrons that can be accommodated. The first energy level can hold up to 2 electrons, while the second and subsequent energy levels can hold up to 8 electrons each.
For noble gases, their outermost energy level is filled with electrons, giving them a stable electron configuration. The outermost level of noble gases is known as the valence shell, and it contains either 2 electrons (in the case of helium) or 8 electrons (for the other noble gases).
Helium (He) is an exception among the noble gases, as it has only 2 electrons in its outermost level (the first energy level). This is because the first energy level can hold a maximum of 2 electrons.
The remaining noble gases (Ne, Ar, Kr, Xe, Rn) have 8 electrons in their outermost level. This is because the second and subsequent energy levels can hold up to 8 electrons, providing a full complement of electrons for these elements.
The stable electron configuration of noble gases is a result of achieving an electron arrangement similar to that of a noble gas and is considered a stable and energetically favorable state.
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3k + 9 = 18 , find k
Answers
Answer:
3
Explanation:
Collect like terms and divide by the coefficient of k
Answer:
3k + 9 = 18, find k, k is equal to 3
Explanation:
3k + 9 = 18, k = 3
3(3) + 9 = 18
3x3 is 9
9 + 9 = 18
therefore, k is 3
Why copper sulphate and sodium hydroxide requires heat?
Answers
Heating copper sulfate and sodium hydroxide is often required to facilitate the reaction between the two compounds and promote the formation of a precipitate called copper hydroxide.
The reaction between copper sulfate (CuSO4) and sodium hydroxide (NaOH) is an example of a double displacement reaction. When the two compounds are combined, the positive ions (cations) and negative ions (anions) switch partners, forming new compounds.
In this reaction, copper sulfate contains copper ions (Cu2+) and sulfate ions (SO4^2-), while sodium hydroxide contains sodium ions (Na+) and hydroxide ions (OH-). When these two compounds react, the copper ions combine with hydroxide ions to form copper hydroxide (Cu(OH)2), while sodium ions combine with sulfate ions to form sodium sulfate (Na2SO4).
Heating the reaction mixture helps to increase the kinetic energy of the particles, allowing for more frequent and energetic collisions between the reactant particles. This increased collision frequency and energy promote the reaction between copper sulfate and sodium hydroxide and facilitate the formation of copper hydroxide as a precipitate.
Heating copper sulfate and sodium hydroxide is necessary to provide the energy required for the reaction to occur at a reasonable rate and facilitate the formation of copper hydroxide as a precipitate.
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how many moles of silver, ag, can be formed from 91.8 moles of calcium, ca, and 41.2 moles of silver nitrate, agno3?
Answers
The moles of Ag formed from 91.8 moles of calcium and 41.2 moles of silver nitrate. The balanced formula: Ca(NO3)2 + 2AgCl = 2AgNO3 + CaCl2.
In the balanced equation, the reaction between 2 moles of AgNO3 and CaCl2 yields 2 moles of AgCl.
AgNO3 and AgCl have a molar ratio of 1:1.
The amount of AgCl generated is 18 moles if there are 18 moles of AgNO3 for the reaction with CaCl2.
In this case 41.2 moles of silver nitrate will give,
41.2 ×2
= 82.4 moles of Ag
In the International System of Units, a substance's amount is measured in moles, which are denoted by the sign mol. The quantity of a substance is a measurement of the number of elementary entities of a specific substance present in an object or sample.
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A thermite reaction realeses large amounts of heat and light resulting in the melting of the iron metal
Answers
Answer:
1. Fe₂O₃ : Al = 1 : 2
2. Fe₂O₃ : Al₂O₃ = 1 : 1
3. Fe₂O₃ : Fe = 1 : 2
Note: The question is incomplete. The complete question is given below :
A thermite reaction releases large amounts of heat and light, resulting in the melting of the iron metal that forms during the reaction. The balanced chemical equation is given below: Fe₂O₃(s) + 2Al(s) ---> Al₂O₃(s) + 2Fe(l) Determine the correct mole ratios for the following substances, based on this chemical equation.
Explanation:
A thermite reaction is a highly exothermic reaction that occurs between a mixture of powdered aluminium and iron (iii) oxide.
The reaction is a redox reaction which produces aluminium oxide and metallic iron.
The heat given out in the reaction melts the iron formed. It is used to join railway tracks or cracked machine parts. The molten iron runs down between the tracks and welds them together.
The balanced equation of the reaction is given below :
Fe₂O₃(s) + 2Al(s) ---> Al₂O₃(s) + 2Fe(l) + Heat
The mole ratio of the reactant and products are as follows:
1. 1 mole of Iron (iii) oxide and 2 moles of aluminium are combined
Fe₂O₃ : Al = 1 : 2
2. 1 mole of aluminium oxide is produced from 1 mole of iron (iii) oxide
Fe₂O₃ : Al₂O₃ = 1 : 1
3. 2 moles of of iron are produced from 1 mole of iron (iii) oxide
Fe₂O₃ : Fe = 1 : 2
which can be used to store raw poultry? a thoroughly rinsed chemical bucket a plastic container covered with a dinner plate a metal pan covered with plastic wrap a rinsed ground turkey container
Answers
A plastic container covered with a dinner plate is used in the store raw poultry. Hence option b is correct.
What is poultry?Poultry is defined as several bird species that are raised on farms for food, fiber, or entertainment. The most crucial sense for all birds, including hens, is vision.
Raw fowl should be kept in a bowl or on a tray in the bottom of the refrigerator. Your refrigerator should be kept at a minimum temperature of 38 to 40 degrees Fahrenheit. Only one to two days should be allowed for fresh, raw poultry. Rinsing poultry before cooking is no longer advised.
Thus, a plastic container covered with a dinner plate is used in the store raw poultry. Hence option b is correct.
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A sample of gas occupies 1.2 L at 12.0oC. Assuming pressure remains the same, what would be the volume (in L) of this gas at 67oC?
A.
1.4
B.
1.0
C.
0.2
D.
5.0
E.
6.7
Answers
V1 = 1.2 L
T1 = 12.0 + 273 = 285 K
T2 = 67.0 +273 = 340 K
1.2/285 = V2 / 340
V2 = 1.4 L
How much heat will be absorbed when 182. 7 g or Fe304 decomposes from O2 and Fe with the equation Fe3O4 + 1120. 5kj -> 3Fe + 2O2
Answers
The amount of heat absorbed when 182.7 g of Fe3O4 decomposes into Fe and O2 is 885.6 kJ.
The given chemical equation shows that the decomposition of 1 mole of Fe3O4 releases 1120.5 kJ of heat energy. To find the amount of heat absorbed when 182.7 g of Fe3O4 decomposes, we first need to determine the number of moles of Fe3O4 present.
The molar mass of Fe3O4 is:
(3 x atomic mass of Fe) + (4 x atomic mass of O) = (3 x 55.85 g/mol) + (4 x 16.00 g/mol) = 231.53 g/mol
The number of moles of Fe3O4 is:
182.7 g / 231.53 g/mol = 0.7894 mol
Now, we can use stoichiometry to calculate the amount of heat absorbed:
0.7894 mol Fe3O4 x (1120.5 kJ / 1 mol Fe3O4) = 885.6 kJ
Decomposition is a type of chemical reaction in which a single compound breaks down into two or more simpler substances. This reaction can occur through various processes, such as heating, exposure to light, or addition of a catalyst.
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When computers were first invented, their memory was measured in sheets of paper that could be coded. The new Playstation 5 has a storage of 825 Gb. How many sheets of paper would it take to fill the new Playstation 5?
Answers
Answer:
The number of cards required to fill an 825 GB PlayStation is 6.875 × 10⁹ sheets of paper or 6875000000 sheets of paper
Explanation:
The coded sheets of paper are known as punched cards. Punched cards are paper cards where holes may be punched by hand or machine to represent computer data and instructions. Each hole in a card represents one bit: It either can be punched, or not punched. The holes in a classic card are arranged in 80 columns and 12 rows. The maximum information that can be stored in the punched card = 80 x 12 = 960 bits.
8 bits = 1 byte
960 bits = 120 bytes
1 gigabyte = 10⁹ bytes
Therefore, the number of cards required to fill an 825 GB PlayStation is;
(825/120) × 10⁹ = 6.875 × 10⁹ sheets of paper or 6875000000 sheets of paper
What type of variable is held constant in an experiment?
Answers
Answer:
A variable in an experiment which is held constant in order to assess the relationship between multiple variables, is a control variable.
Explanation:
The horse achieved its highest status during the___________dynasty (618-906 CE), a time of unparalleled political, artist, and cultural greatness.
A. Qin
B. Han
C. Tang
D. Shang
Answers
Which of the following best describes the particles in an atom?
Answers
Answer:
Electrons move around a nucleus.
Explanation:
why is OH on the outside of the lewis structure for methanol?
Answers
In the Lewis structure of methanol (CH3OH), the OH group is placed on the outside because it is an important functional group that influences the chemical properties and reactivity of the molecule.
The Lewis structure is a representation of a molecule that shows the arrangement of atoms and valence electrons. In methanol, carbon (C) is the central atom bonded to three hydrogen (H) atoms and one oxygen (O) atom. The oxygen atom forms a single bond with carbon and also has two lone pairs of electrons.
The placement of the OH group (hydroxyl group) on the outside of the Lewis structure is significant because it determines the chemical behavior of methanol. The OH group consists of an oxygen atom bonded to a hydrogen atom and represents the presence of an alcohol functional group.
In organic chemistry, functional groups are specific arrangements of atoms within a molecule that give rise to characteristic chemical reactions and properties. The presence and position of functional groups can greatly influence the behavior and reactivity of a compound. In the case of methanol, the hydroxyl group provides the molecule with its characteristic properties.
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write the ionic equation for dissolution and the solubility product (ksp) expression for each of the following slightly soluble ionic compounds: (a) pbcl2 (b) ag2s (c) sr3(po4)2 (d) srso4
Answers
The ionic equation for dissolution and the solubility product (ksp) expression for each of the following slightly soluble ionic compounds.
(a) For PbCl2:
Dissolution: PbCl2 (s) → Pb²⁺ (aq) + 2Cl⁻ (aq)
Ionic equation: PbCl2 (s) ⇌ Pb²⁺ (aq) + 2Cl⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Pb²⁺][Cl⁻]²
(b) For Ag2S:
Dissolution: Ag2S (s) → 2Ag⁺ (aq) + S²⁻ (aq)
Ionic equation: Ag2S (s) ⇌ 2Ag⁺ (aq) + S²⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Ag⁺]²[S²⁻]
(c) For Sr3(PO4)2:
Dissolution: Sr3(PO4)2 (s) → 3Sr²⁺ (aq) + 2PO₄³⁻ (aq)
Ionic equation: Sr3(PO4)2 (s) ⇌ 3Sr²⁺ (aq) + 2PO₄³⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Sr²⁺]³[PO₄³⁻]²
(d) For SrSO4:
Dissolution: SrSO4 (s) → Sr²⁺ (aq) + SO₄²⁻ (aq)
Ionic equation: SrSO4 (s) ⇌ Sr²⁺ (aq) + SO₄²⁻ (aq)
Solubility product (Ksp) expression: Ksp = [Sr²⁺][SO₄²⁻]
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The compound XCl4 contains 75.0% Cl by mass. What is the
element X?
nch of the following
Answers
The element X is titanium.
According to the question, the percentage by mass of Cl in XCl4 is 75.0%.
The percentage by mass is obtained from;
Mass of element in the compound/molar mass of compound * 100
Hence;
Let the mass of the unknown element be X
75 = 142/X + 142 * 100
75 (X + 142) = 142 * 100
75X + 10650 = 14200
75X = 14200 - 10650
X = 14200 - 10650/75
X = 47
Hence, X is titanium.
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the normal boiling point for hbr is higher than the normal boiling point for hcl. this can be explained by question 16 options: a) larger dipole-dipole forces for hbr. b) larger dispersion forces for hbr. c) larger hydrogen-bond forces for hbr. d) larger dipole-dipole forces, larger dispersion forces, and larger hydrogen-bond forces for hbr.
Answers
A higher dispersion force than HBR leads to a higher boiling point of HBR and a larger force between dipoles.
Both HBr and HCl are polar molecules. Therefore, both molecules have dipole-dipole interactions. The attraction is greater with Hcl and HBR than with Hcl alone. Dipole-dipole forces occur between molecules with permanent dipoles (polar molecules). For molecules of similar size and mass, these forces increase with increasing polarity. Polar molecules also induce dipoles in nonpolar molecules, resulting in dipole-induced dipole forces. A higher dispersion force than HBR leads to a higher boiling point of HBR and a larger force between dipoles.
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Facts about GeoScience/Geology Science
Answers
Name these organic compunds
Answers
The name of the following organic compounds are:
1. C₇H₁₂ = heptane
2. (CH₃)₃CCH₂COH = tert-butanol
3. ClF = chlorine monofluoride
4. CH₃)₂C= C(CH₃)₂ = 2,3-dimethyl-2-butene
What are the names for other organic compounds?5. O represents the chemical element oxygen. It is a highly reactive, nonmetallic element that is essential for life and makes up about 21% of the Earth's atmosphere.
6. The chemical formula (CH₃)₂CHCH(OH)CH₃ represents the organic compound 2-methyl-2-propanol, also known as tert-amyl alcohol or 2-methylbutan-2-ol.
7. OO is a valid chemical formula that represents molecular oxygen, which is a diatomic molecule consisting of two oxygen atoms.
8. The chemical formula CH₃CH₂NHCH(CH₃)₂ represents the organic compound called N-ethyl-N-methylpropan-1-amine.
9. The chemical formula CH₃CHCH₃CONH(CH₃) represents the organic compound N-methylbutanamide, also known as isobutramide
10. The tenth compound, H₃CH₃CCO₂H, is called propanoic acid.
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What conditions make G always positive?
A. G is always positive when enthalpy and entropy both decrease.
B. G is always positive when enthalpy increases and entropy
decreases.
C. G is always positive when enthalpy decreases and entropy
increases.
D. G is always positive when enthalpy and entropy both increase.
Answers
Answer:
b
Explanation:
G is always positive when enthalpy increases and entropy decreases.
What determines if a reaction is spontaneous?The temperature can be the deciding factor in spontaneity when the enthalpy and entropy terms have opposite signs: If ΔH is negative, and –TΔS positive, the reaction will be spontaneous at low temperatures (decreasing the magnitude of the entropy term).
Why is negative Gibbs free energy spontaneous?Where ΔH is the enthalpy change (the heat of the reaction) and ΔS is the change in entropy. If the free energy is negative, we are looking at changes in enthalpy and entropy that favor the process and it occurs spontaneously.
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which of the following statement is correct? liquid staTE HAS THE MOST ENERYGY
Answers
Answer:
no because gas has the most kinetic energy
Compounds are formed when two or more ___ are chemically combined.
Answers
Answer:
Elements
Explanation:
I just did this
true or false: the molar enthalpy of sublimation of a given substance can be determined if its enthalpies of fusion and vaporization are known.
Answers
The given statement "The molar enthalpy of sublimation of a given substance can be determined if its enthalpies of fusion and vaporization are known" is true.
The molar enthalpy of sublimation of a substance can be determined if its enthalpies of fusion (melting) and vaporization (boiling) are known. The enthalpy of sublimation refers to the energy required to change a substance from the solid phase directly to the gaseous phase, bypassing the liquid phase.
The enthalpy change during sublimation can be calculated by considering the enthalpies of fusion and vaporization. When a substance undergoes sublimation, it first requires energy to melt from the solid phase to the liquid phase (enthalpy of fusion) and then additional energy to vaporize from the liquid phase to the gaseous phase (enthalpy of vaporization). The sum of these two enthalpies represents the overall energy change during sublimation.
Therefore, by adding the enthalpy of fusion and the enthalpy of vaporization, one can determine the molar enthalpy of sublimation for a given substance.
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The process that is used by organisms to convert complex organic molecules into carbon dioxide and water molecules, with an overall release of energy is
1 photosynthesis
2 Plants
3 cellular respiration
4 Calorie
Answers
I think because it’s the opposite of photosynthesis which uses carbon dioxide and water to create organic molecules (glucose)
According to the following reaction, how many grams of copper(II) nitrate will be formed upon the complete reaction of 25.4 grams of copper with excess silver nitrate? silver nitrate (aq) + copper (s) copper(II) nitrate (aq) + silver(s)______ grams copper(II) nitrate
Answers
According to the following reaction, the number of grams of copper(II) nitrate that will be formed upon the complete reaction of 25.4 grams of copper with excess silver nitrate is 74.9 grams.
Cu + 2AgNO3 → Cu(NO3)2 + 2Ag
Given that the amount of copper used in the reaction = 25.4 grams
We know that the molar mass of Cu = 63.55 g/mol.
So, the number of moles of copper = 25.4 g / 63.55 g/mol = 0.3996 mol
According to the balanced reaction equation, 1 mole of copper reacts with 2 moles of silver nitrate to form 1 mole of copper(II) nitrate. So, the number of moles of copper nitrate formed = 0.3996 × 1 / 2 = 0.1998 mol
The molar mass of Cu(NO3)2 = [63.55 + (2 × 14.01) + (6 × 16)] g/mol= 187.56 g/mol.
So, the number of grams of copper(II) nitrate formed from the given reaction = number of moles of Cu(NO3)2 × molar mass of Cu(NO3)2= 0.1998 mol × 187.56 g/mol= 37.47 g
The number of grams of copper(II) nitrate formed upon the complete reaction of 25.4 grams of copper with excess silver nitrate is 37.47 g, rounded to 2 decimal places.= 37.5 g.
Thus, the answer is 37.5 grams.
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The compounds below are all ionic (metal + nonmetal). All of the elements involved follow the charge trends on the periodic table Name these a) b) c) CaF2 Na2S MgO Write formulas for these: (See Example 2.3 in your textbook.) a) b) c) a compound involving lithium and nitrogen a compound involving barium and iodine magnesium sulfide
Answers
The names of the following compounds are:
a) \(CaF_2\): Calcium fluoride
b) \(Na_2S\): Sodium sulphide
c) \(MgO\): Magnesium oxide
a) Lithium nitride: \(Li_3N\)
b) Barium iodide: \(BaI_2\)
c) Magnesium sulphide: \(MgS\)
These compounds are named by combining the names of the metal and nonmetal, with the nonmetal's ending changed to "-ide."
In terms of the formulas, the charges of the elements are determined by their positions on the periodic table.
In compound a), lithium has a +1 charge, while nitrogen has a -3 charge. To balance the charges, three lithium ions (3x+1 = +3) combine with one nitrogen ion (-3) to form Li3N.
In compound b), barium has a +2 charge, while iodine has a -1 charge. Two barium ions (2x+2 = +4) combine with two iodine ions (2x-1 = -2) to form BaI2.
In compound c), magnesium has a +2 charge, while sulphur has a -2 charge. One magnesium ion (+2) combines with one sulphur ion (-2) to form MgS.
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and water from the masses.
2.43 g H₂O was vaporized during heating.
The molar mass of H₂O 18.02 g/mol.
How many moles of H₂O are present?
[?] mol H₂O
Keep at least one extra significant figure when reporting your
answer.
mol H₂O
Enter
Answers
The number of mole of water, H₂O present, given that 2.43 g of H₂O was vaporized is 0.13 mole
How do i determine the number of mole of H₂O present?From the above question, the following parameters were obtained:
Mass of water, H₂O = 2.43 grams Molar mass of water, H₂O = 18.02 g/mol Number of mole of water, H₂O =?Mole and mass of a substance are related by the following formula:
Mole = mass / molar mass
Inputting the given parameters, we can obtain the mole of water, H₂O as follow:
Mole of water, H₂O = 2.43/ 18.02
Mole of water, H₂O = 0.13 mole
Thus, we can say that the mole of water, H₂O present is 0.13 mole
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