2. Atoms & Elements

How many molecules of N₂O₄ are in 76.3 g N₂O₄?

How many moles of propylene (C₃H₆) are in 25.0 g?

How many moles of water, H₂O, contain 2.0×10²² molecules of water?

What mass (in mg) does 2.63 moles of Nickel have?

In a classroom, which comparison would a teacher most likely use to describe a mole?

Which statement best explains the purpose of using a mole in the measurement of matter?

Calculate the mass of 1.00×10²⁴ (a septillion) molecules of water.

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

How many molecules of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g/mol.

How many moles are in 22 grams of argon?

What is the mass of 5 moles of Fe₂O₃?

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