(a) Write 'true' or 'false' for each statement. (a) A mole of horses contain a mole of horse legs.

(a) Write 'true' or 'false' for each statement. (a) A mole of horses contain a mole of horse legs.

(a) Write 'true' or 'false' for each statement. (b) A mole of water has a mass of 18.0 g.

(a) Write “true” or “false” for each statement. (c) The mass of 1 ammonia molecule is 17.0 g.

(a) Write 'true' or 'false' for each statement. (d) A mole of NaCl(s) contains 2 moles of ions

(a) What is the mass, in grams, of one mole of ¹²C?

(b) How many bromine atoms are present in one mole of ¹²C?

Without doing any detailed calculations (but using a periodic table to give atomic weights), rank the following samples in order of increasing numbers of atoms: 0.50 mol H₂O, 23 g Na, 6.0⨉10²³ N₂ molecules.

What is the mass, in kilograms, of an Avogadro's number of people, if the average mass of a person is 160 lb?

What is the mass, in kilograms, of an Avogadro's number of people, if the average mass of a person is 160 lb? How does this compare with the mass of Earth, 5.98⨉10²⁴ kg?

If Avogadro's number of pennies is divided equally among the 321 million men, women, and children in the United States, how many dollars would each receive?

Calculate the following quantities: (a) mass, in grams, of 0.105 mol sucrose (C₁₂H₂₂O₁₁)

Calculate the following quantities: (b) moles of Zn(NO₃)₂ in 143.50 g of this substance

Calculate the following quantities: (c) number of molecules in 1.0⨉10⁻⁶ mol CH₃CH₂OH

Calculate the following quantities: (d) number of N atoms in 0.410 mol NH₃

Calculate the following quantities: (a) mass, in grams, of 1.50⨉10⁻² mol CdS

Calculate the following quantities: (b) number of moles of NH₄Cl in 86.6 g of this substance

Calculate the following quantities: (c) number of molecules in 8.447⨉10⁻² mol C₆H₆

Calculate the following quantities: (d) number of O atoms in 6.25⨉10⁻³ mol Al(NO₃)₃

(a) What is the mass, in grams, of 2.50⨉10⁻³ mol of ammonium phosphate?

(b) How many moles of chloride ions are in 0.2550 g of aluminum chloride?

(c) What is the mass, in grams, of 7.70⨉10²⁰ molecules of caffeine, C₈H₁₀N₄O₂?

(d) What is the molar mass of cholesterol if 0.00105 mol has a mass of 0.406 g?

(a) What is the mass, in grams, of 1.223 mol of iron(III) sulfate? (b) How many moles of ammonium ions are in 6.955 g of ammonium carbonate? (c) What is the mass, in grams, of 1.50 * 1021 molecules of aspirin, C9H8O4?

(d) What is the molar mass of diazepam (Valium®) if 0.05570 mol has a mass of 15.86 g?

The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is C₆H₁₀OS₂. a. What is the molar mass of allicin?

The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is C₆H₁₀OS₂. (b) How many moles of allicin are present in 5.00 mg of this substance?

The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is C₆H₁₀OS₂. (c) How many molecules of allicin are in 5.00 mg of this substance?

The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is C₆H₁₀OS₂. (d) How many S atoms are present in 5.00 mg of allicin?