Chemistry Topic Practice

Moles and Mass Calculations | GCSE Chemistry Practice

A mole is a unit that represents 6.02 x 10^23 particles.

How much does one mole of Carbon weigh?

What is Moles and Mass Calculations | Practice?

"The base unit of amount of substance in the International System of Units (SI)."

Question 1

Which formula is used to calculate the number of moles?

Question 2

Calculate the mass of 0.25 moles of Calcium Carbonate (CaCO3). (Mr=100)

Question 3

How many moles are in 36g of water? (Mr of H2O = 18)

Moles = Mass (g) / Mr (relative formula mass).

Mass = Moles x Mr.

Avogadro constant is 6.02 x 10^23.

Exam Tip

Math Tip: Rearrange the formula using a triangle—Mass at the top, Moles and Mr at the bottom.

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