2. Atoms & Elements

A 500. mL flask is filled with 2.00 g of an unknown gas at standard temperature and pressure (STP). What is the molar mass of the gas?

What is the mass in grams of a single molecule of sucrose (C_{12}H_{22}O_{11})?

Given that a sample of an element has a mass of 10.4 grams and contains 0.129 moles, what is the molar mass of the element?

Which of the following is the correct molar mass of H2O?

If the molar mass of methanol (CH_3OH) is 32.04 g/mol, what is the mass of a sample containing 56.6 moles of methanol?

Which of the following is the molar mass of aluminum (Al)?

What is the mass of 7.00 mol of silver nitrate (AgNO_3)?

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

A sample contains 7.5 g of CaCl2·9H2O. How many grams of pure CaCl2 are present in this sample?

How many grams are present in 0.02 moles of beryllium iodide (BeI_2)?

Which of the following correctly represents the formula for calculating the molar mass of water (H_2O)?

Which of the following is the molar mass of BF_3?

How many grams are present in 7.8 moles of NaCl?

What is the approximate percent by mass of oxygen in SO_3?

Given that the molar mass of octane (C_8H_{18}) is 114.22 g/mol, what is the mass of 22.05 mol of octane?