Calculate the number of oxygen atoms in a 80.0 g sample of forsterite (Mg, SiO,).

Q: Calculate the number of N atoms in 8.234 g of NH4NO2

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Q: in 4.95g of nickel

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Q: Calculate the mass in grams for 4 molecules N2O5

A: The mass of 4 molecules of dinitrogen pentoxide is calculated as,

Q: 67. A compound used in the nuclear industry has the following composition: uranium, 67.61%;…

A:

Q: Calculate the molar mass for H2SO4, Ca(OH)2, a

A: Sum of the atomic masses of all the constituent atoms of a molecule gives molar mass  Atomic…

Q: Determine the molecular formula of a compound with molar mass of 92.0 g/mol and an empirical formula…

A: To determine the molecular formula of a compound with a molar mass of 92.0 g/mol and an empirical…

Q: How many grams would 71,934,010,495 atoms of a substance weigh if it has a molar mass of 23.7889…

A: Number of atoms = 71,934,010,495 atoms  6.02×1023 atoms = 1 mol 71,934,010,495 atoms =…

Q: 2. Determine the percent by mass of all elements in the compound C,H,CI.

A: Given compound = C4H9Cl standard molar masses C = 12 g/mol H = 1 g/mol Cl = 35.45 g/mol

Q: Determine the percent composition (by mass) of oxygen in H2SO4

A: Lets assume we are having 1 mole H2SO4: So one mole of H2SO4 is having 4 moles of oxygen atoms.…

Q: 57. A compound was analyzed and was found to contain the following percentages of the elements by…

A: The empirical formula can be calculated by general steps as follows - First of all calculate the…

Q: Calculate the number of nitrogen atoms in a 150.0 g sample of dinitrogen tetroxide

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Q: (b) The number of moles of potassium that contains 8.93 × 104 atoms. x 10 mol

A: Given  Atoms of potassium = 8.93 x 1025  To find = number of moles of potassium

Q: Calculate the number of atoms of glucose in 2.116 x 10-3 grams of glucose, C6H12O6. Hint: molar mass…

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Q: Combustion analysis of a compound yields: C 78.52%, H 8.39%, N 8.33%, and O 4.76%. Determine the…

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Q: The formula for molybdenum(IV) hydroxide is Mo(OH)4. What is the percent by mass of oxygen in…

A: percent by mass of O = (mass of O/mass of Mo(OH)4 ) × 100%

Q: How many moles of bromine atoms are present in a sample that contains 4.53 moles of BBr3 ?

A: From any molecular formula of any molecule, we can determine the moles of each atoms present in it.…

Q: Calculate the number of oxygen atoms in a 150.0 g sample of iron(III) oxide (Fe,03).

A: Number of moles = mass/molar mass  Molar mass of Fe2O3 = 159.69 g/mol  1 mol = 6.022 × 1023 atoms

Q: Calculate the mass, in grams, of  0.607  mol of hydrogen peroxide,  H2O2 . mass of  H2O2:

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Q: 8. Calculate the number of moles in a sample containing 1.85 x 1034 molecules of water.

A: Given that: Molecule of water = 1.85 × 1034 molecules Number of moles = ?

Q: How many moles of Al(C2H3O2)3 contain 19 moles of O? Determine the % composition by mass of the…

A: % composition = (molar mass of element/total molar mass of compound)*100

Q: The mass fraction of an element present in a compound can be obtained by comparing the mass of the…

A: Mass fraction of an element is defined as the total mass of the element to the total mass (molar…

Q: The snicker bar you just bought has 1.40 x 1029 molecules. How many moles is that?

A: Given data: The number of molecules in the snicker bar = 1.40 x 1029 molecules. To calculate: The…

Q: The active ingredient in a common treatment for upset stomach is sodium bicarbonate, NaHCO3.…

A: Calculate the percent, by mass, of carbon in sodium bicarbonate.

Q: A binary compound of boron and hydrogen has the following mass composition: 78.14% boron, 21.86%…

A: Determine how many grams of each element are present in  of compound. Given compound has  boron (by…

Q: A compound has a molar mass of 86 g/mol and has the percent composition (by mass) of 55.8% C, 37.2%…

A: To determine the empirical formula for compound , first we have to consider the given percentage of…

Q: Write down the chemical formula for butane and calculate its molar mass.

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Q: Complete the following calculation and upload your work. You have 5.63 x 1024 atoms of the…

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Q: Determine the % composition by mass of sodium phosphorous and oxygen in Na3PO4

A: Na3 PO4 Sodium phosphate  Alkali metal phosphate

Q: Bromoform is 94.85% bromine, 0.40% hydrogen, and 4.75% carbon by mass. Determine its empirical…

A: The given data contains,   bromine=94.85%   hydrogen=0.40%   carbon=4.75%

Q: Calculate the mass (in g) of sample. 1 glucose molecule (C6H12O6)

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Q: How do you calculate the number of moles of Br atoms in 0.41 mol of CHBr3?

A: The relation of mass and number of moles can be written as: Where, ‘n’ is the number of moles ‘m’…

Q: Calculate the number of moles of barium chloride in 127 g of a 3.81% by mass barium

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Q: Question attached

A: Mass percentage It is the ratio of mass of an atom to the total mass of the compond. mass…

Q: Calculate the mass % of O in lithium permanganate.

A: Mass percentage is the term used to calculate the concentration of any element in the given…

Q: 10. This question is about compounds used in fertilisers. la) A compound used as a fertiliser has…

A:

Q: What is the simplest or empirical formula of a compound which is found to have a mole ratio    of…

A: Given;

Q: A Chlorin oxide is 59.7 % by mass Cl. What is the empirical formula of the ?oxide CI02

A: The compound is an oxide of chlorine. The percent mass of chlorine in the compound is 59.7 %. The…

Q: Calculate the number of atoms in 0.0015 mole  of Cu.

A: Given, A mole of copper =  0.0015 moles. Calculate the number of atoms.

Q: . Calculate the mass of manganese(II) carbonate

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Q: Calculate the number of moles in 63.7 g of sulfur (S).

A: Given, Mass of Sulfur (S) = 63.7 g Number of moles of Sulfur (S) = ? Note: Atomic mass of Sulfur (S)…

Q: What is the percent by mass of phosphorus in PCI3?

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Q: Calculate the molar mass of Ca1NO322.

A: The given chemical formula represents calcium nitrate.

Q: Calculate the percentage composition of all the atoms/elements in magnesium chlorate, Mg(CIO3)2.

A: Given :- chemical formula of Magnesium chlorate = Mg(ClO3)2  To determine :- percentage composition…

Q: Calculate the average mass of 500. atoms of iron (Fe).

A: Atomic mass of one iron atom = 55.845 u molar mass = 55.845 gm/mol Use Avogadro's number to divide…

Q: Nitroglycerin has the following percentage composition: carbon: 15.87%, hydrogen: 2.22%,…

A: Given datas ;  % of carbon = 15.87 % % of hydrogen = 2.22 % % of nitrogen = 18.50 % % of oxygen =…

Q: Calculate the number of atoms in 0.0015 moles of Cu.

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Q: Arrange the following compounds from left to right in order of increasing percentage by mass of…

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Q: a) Determine the molar mass (also known as molecular weight or molecular mass) of the following…

A: a. Determination of the molar mass: The mass of one mole of molecules is called molar mass. The…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.