2. Atoms & Elements

How many iron atoms are contained in 354 g of iron?

The molar mass of nitrogen (N₂) is 28.02 g/mol. What is the mass, in grams, of 4.60 mol of N₂?

128.3 grams of methane (CH₄) is equal to how many moles of methane?

How many moles of cesium (Cs) atoms are in 675 g cCs?

How many moles of silicon (Si) atoms are equivalent to 65.8 g Si?

One atom of gold weighs 3.27 x 10^-13 ng. how many gold atoms are in 1.0 g of gold?

How many moles are in 2.5 g of N₂? 0.089 moles, 0.18 moles, 1.3 moles, 11 moles

What is the mass to the nearest tenth of a gram of 3.50 moles of sodium metal?

How many atoms are in a sample of 1.83 moles of potassium (K) atoms?

Calculate the number of oxygen atoms found in 783.9 g NiCl₂ • 6 H₂O.

The molar mass of sodium is 22.99 g/mol and the molar mass of chlorine is 35.45 g/mol.