2. Atoms & Elements

What is the molar mass of chlorine gas (Cl_2)?

Which of the following steps is necessary to convert the mass of a sample of NaCl to the number of NaCl formula units present?

Which of the following is the correct molar mass (to two decimal places) of CH3OCH3 (dimethyl ether)?

What is the mass (in grams) of 10.00 L of propane vapor (C3H8) at standard temperature and pressure (STP)?

How many grams of Fe_2O_3 are present in 0.500 mole of Fe_2O_3?

What is the mass, in grams, of 2.50 mol of iron(II) hydroxide, Fe(OH)2?

If you have 644 grams of retinol (C20H30O), how many moles of retinol do you have?

A 42.7 gram sample of potassium nitrate (KNO_3) contains how many grams of potassium?

What is the mass, in grams, of 202 atoms of iron (Fe)? (1 mol of Fe has a mass of 55.85 g; Avogadro's number is 6.022 × 10^{23} atoms/mol.)

Which of the following best defines molar mass?

What is the mass of 9.45 mol of aluminum oxide (Al_2O_3)?

How many carbon atoms are present in 77.28 g of ethane (C2H6)?

What is the molar mass of CHCl_3?

Given a 10.0 g sample of O_2 gas, what is the molar mass of oxygen (O_2)?

What is the molar mass of aluminum (Al)?