2. Atoms & Elements

A sample of CaCO3 has a mass of 751 grams. How many total atoms are present in this sample?

A chloride of rhenium contains 63.6% rhenium by mass. What is the empirical formula of this compound?

If you have 17 grams of NaCl, how many moles of NaCl do you have?

How many iodine atoms are present in 4 molecules of carbon tetraiodide (CI_4)?

Which of the following is the molar mass of hydrochloric acid (HCl)?

Given the chemical formula 6Al2O3, how many total atoms of aluminum and oxygen are present?

What is the mass, in grams, of 9.30 moles of SiH_4?

Where can you find the molar mass of aluminum for use in chemical calculations?

How many grams are present in 0.885 moles of manganese (Mn)? (Atomic mass of Mn = 54.94 g/mol)

What is the molar mass of fluorine (F) in grams per mole?

What is the mass, in grams, of 1.70 mol of carbon (atomic mass = 12.01 g/mol)?

What is the molar mass of Mg3(PO4)2?

Given that the molar mass of sulfuric acid (H_2SO_4) is 98 g/mol, what is the mass of oxygen present in 250 g of H_2SO_4?

How many grams are present in 238 moles of arsenic (As)? (Atomic mass of As = 74.92 g/mol)

How many atoms are present in one formula unit of magnesium hydroxide, Mg(OH)_2?