2. Atoms & Elements

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?

What is the molar mass of CaCl_2?

How many total atoms are present in one formula unit of the compound Fe_2O_3?

A compound consists of 37.51 g of C, 8.38 g of H, and 54.11 g of O. What is the molar mass of the compound if its empirical formula is C3H8O2 and its molecular formula is a multiple of the empirical formula?

What is the molar mass of molecular hydrogen (H_2)?

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

What is the total mass in grams of 0.75 mole of SO_2?

Which of the following is the correct molar mass (in g/mol) of NH4Cl (s), the product formed in the reaction NH3(g) + HCl(g) → NH4Cl(s)?