2. Atoms & Elements

How many grams of NaCl (molar mass = 58.44 g/mol) are needed to prepare 1.00 mol of Na+ ions?

What is the molar mass of Na_2SO_4 (sodium sulfate)?

How many formula units are present in 3.6 grams of NaCl?

What is the molar mass of NaNO3?

How many moles are present in 25.3 g of potassium nitrate (KNO3)? (Molar mass of KNO3 = 101.1 g/mol)

How many atoms of nitrogen are present in 218 g of dinitrogen pentoxide (N2O5)?

What is the mass of 3.50 mol of Zn atoms?

What is the molar mass of iron(III) chloride, FeCl_3?

What is the molar mass of copper (Cu) in grams per mole?

What is the molar mass of potassium nitrate (KNO_3)?

What is the molar mass of CO_2?

Which of the following is the molar mass of gold (Au)?

What mass of KBr is present in 75.0 mL of a 0.250 M KBr solution?

You need 2.5 mol of iron (Fe) for an experiment. How many grams of iron must you measure out?

What is the molar mass of nitric oxide (NO)?