2. Atoms & Elements

Which of the following compounds has the smallest molar mass?

What is the mass in grams of 1.02 × 10^{24} atoms of manganese (Mn)? (Atomic mass of Mn = 54.94 g/mol)

Which of the following numerical expressions gives the number of moles in 5.0 g of CaO?

A sample of CH2F2 with a mass of 19 g contains how many atoms of F?

A gas has a density of 3.55 g/L at 2.00 atm and 55.0 °C. What is the molar mass of the gas?

What is the molar mass of methanol (CH3OH)?

If 0.250 mol of Cu is produced in a reaction, and the molar mass of Cu is 63.55 g/mol, how many grams of Cu are produced?

What is the molar mass of C2H4O2 (acetic acid)?

A sample contains magnesium hydroxide. What is the molar mass of Mg(OH)_2?

Calculating molar mass: The mass of 1 mole of sodium chloride, $\mathrm{Na}\mathrm{Cl}$, is closest to which value? (Use atomic masses $\mathrm{Na}\approx 22.99$ and $\mathrm{Cl}\approx 35.45$.)

What is the mass, in grams, of 1.5 moles of CO_2?

What is the mass, in grams, of a 2.16-mol sample of HNO3?

Which of the following is the molar mass of H_2O?

What is the mass, in grams, of 1.70 mol of carbon-12 (C)?

What is the molar mass of H_2?