2. Atoms & Elements

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?

What is the mass, in grams, of 5 moles of Fe_2O_3?

What is the molar mass of acetone (C3H6O)?

In the chemical formula NH4NO3, how many atoms of each element are present?