31. Calculate the number of moles of the indicated substance present in each of the following sample: a. 21.4 mg of nitrogen dioxide b. 1.56 g of copper(II) nitrate C. 2.47 g of carbon disulfide

Q: Calculate the molar mass of each substance. (show solution) H3PO4 CaCO3 (NH4)2SO4 C4H9O2

A: Molar mass means the masses of all the atoms in the moleculeadded together.

Q: Determine the empirical formula and name for a compound that contains 88.0 % Cobalt and 12.0% oxygen…

A: We have 88% as cobalt, 12% as oxygen . We have to predict the empirical formula of the compound.

Q: 38. Calculate the number of grams in each of the following a. 1.29 moles of cobalt(II) chloride b.…

A: Number of grams = Number of moles × Molar mass

Q: Which of the following is an empirical formula? A. N₂O4 B. N₂H6 C. N₂O5 D. CsH₂4

A: An empirical formula is the simplest representation of a chemical compound in terms of the relative…

Q: a sample of hydrate sodium acetate is analyzed and determined to contain 4.27 g of water. how many…

A:

Q: Complete the table:   Compound Mass Moles Number of molecules CO2CO2 _____ 0.0124 _____ COCO _____…

A:

Q: A. Empirical Formula of Magnesium Oxide 1. Mass of crucible plus magnesium 25.748 2. Mass of…

A:

Q: Moles Molecules/atoms Substance Molar Mass Mass Table sugar C12H22011 C. 34334 28.72 Nails Fe 55.85…

A:

Q: What is the correct numerical value for the molar mass, in grams, of CO2 A. 12.0 B. 24.0 C. 44.0 D.…

A:

Q: How many moles are equal to 12.8 grams ofCaO2

A: Moles can be calculated as follows

Q: 6.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A:

Q: 22 A compound consists of 40.00% carbon, 6.71% hydrogen and 53.29% oxygen and has a molecular mass…

A:

Q: A molecular compound is found to consist of 30.4% nitrogen and 69.6% oxygen. If the molecule…

A: Interpretation: A molecular compound is found to consist of 30.4% nitrogen and 69.6% oxygen. A…

Q: Calculate the number of moles in each sample. 74.9 g H2CCl2   n(H2CCl2)=??

A: Given, 74.9 g of dichloromethane.

Q: Mass of watch glass and evaporating dish:67.511 g   Mass of watch glass, evaporating dish, and Mg…

A:

Q: Two moles of a metal X react with three moles of bromine gas. When the reaction is over, both…

A: Given Reaction: 2 moles of a metal X+ 3 moles of bromine gas → ProductGiven that, both reactants…

Q: 1. What is the percent by mass (percent composition) of each element within the compound magnesium…

A: Hi, Since you have posted multiple questions, we will solve first question only. If you want, all…

Q: Which of the following would be used in any of the calculations for determining the molecular…

A: The molecular formula of a compound is furnished as the elemental symbol of the participating atoms,…

Q: Convert 0.377 g aluminum to moles of aluminum. Group of answer choices 71.6 moles 0.140 moles 28.4…

A:

Q: .

A: Molar mass of O2 = 2 • molar atomic mass of Oxygen atom Molar mass of O2 = 2 • 16 = 32gmol-1

Q: A cereal contains 11.0 grams of sucrose (C„H0,) per 60.0 grams of cereal 22 How many grams of cereal…

A:

Q: Using the balanced chemical equation, determine how many moles of NaCl will be produced, if 0.907…

A: A question based on mole concept. A reaction involving formation of NaCl is given using that the…

Q: 11.An unknown compound is comprised of 25.9% N and 74.1% O. The molecular mass of the compound is…

A: Answer

Q: Citric acid, C,H,0,, is found in many fruits How many O atoms are contained in 100. mg of the acid?…

A: According to avagadro's law1 mole of any molecule contains 6.023×1023 moleculesBy using this law we…

Q: In the reaction below, a mixture of carbon monoxide, hydrogen, and methanol is at equilibrium at…

A:

Q: Which sample contains the largest number of chlorine atoms? 10.00g of copper (II) chloride 10.00g…

A:

Q: If you have a 700.0 g sample of calcium acetate, how many moles of calcium acetate are present in…

A:

Q: How many moles would contain 12.0 g of P?

A: Introduction: As per the International system of units (SI), the moles is the unit of measurement…

Q: Aluminum sulfate is made according to the balanced chemical equation: 2AIO(OH)+ 3H2SO4 Al2(SO4)3 +…

A:

Q: c. Calculate the empirical formula from the given percent compositions. 82% nitrogen (N), 18%…

A: The empirical formula for a compound with 82% nitrogen (N) and 18% hydrogen (H) by mass is NH3.To…

Q: What is the empirical formula for the compound formed in previous problem?   Cr I Mass of element…

A:

Q: Calculate the number of moles in the following quantities: a.)3.12 g NaHCO3 b.)570 mg ZnCl2 c.)8.9…

A:

Q: How many molecules are contained in a glass that holds 250 g of water? How many moles does that…

A: Number of moles is given by the ratio of mass of the substance to that of the molar mass of the…

Q: calculate the number of moles of each substance contained in the following masses a. 45.2 mg of…

A:

Q: Obtain the moles of substance in each of the following.  7.83 g S8

A:

Q: 1. a. How many grams of barium nitrite, , are present in 4.62 moles of this compound? grams b. How…

A: 1. a) Given : Moles of compound barium nitrite i.e Ba(NO2)2 = 4.62 mol.

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.