2. Atoms & Elements

What is the mass of 4 moles of helium (He)?

What is the molar mass of sodium chloride (NaCl)?

Which of the following statements correctly describes the formula weight (molar mass) of a compound?

What is the molar mass of sodium chloride (NaCl)?

What is the mass (in grams) of 1.27 mol of water (H_2O)?

How many total valence electrons are present in a molecule of CCl_4?

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

How many hydrogen atoms are present in three formula units of ammonium benzoate, C6H5COONH4?

What is the mass (in grams) of 3.99 moles of krypton (Kr)?

Which conversion factor should you use to convert moles of sodium (Na) to the mass of sodium?

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)