2. Atoms & Elements

What is the mass in grams of 5.90 mol of C_8H_{18} (octane)?

Given 10.0 grams of C6H12O6 (glucose), how many oxygen atoms are present in the sample?

How many oxygen atoms are present in one formula unit of the compound Ba(OH)_2?

How many grams of K2SO4 are present in 0.123 mole of K2SO4? (Molar mass of K2SO4 = 174 g/mol)

What is the molar mass of NaCl?

What is the molar mass of Al_2(SO_4)_3?

What is the molar mass of sodium hydroxide (NaOH)?

What is the molar mass of table salt (NaCl)?

How many iron atoms are present in a 354 g sample of iron (Fe)?

What is the molar mass of N_2?

How many chlorine atoms are present in 29 molecules of chloroform (CHCl_3)?

What is the mass in grams of 5.32 \times 10^{22} molecules of CO_2?

How many grams of CO_2 are present in 2.80 × 10^{24} molecules of CO_2?

What is the total mass, in grams, of 3.01 × 10^{23} atoms of helium gas (He)?

Arrange the following compounds in order from smallest to largest molar mass: H2O, CO2, NH3, CH4.