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3.2.2 Amounts of substances in equations (HT only)

What do the large numbers in front of formulae show in a balanced equation?

A

Balancing numbers apply to moles, not directly to masses.

B

0.125 mol0.125\ \text{mol}0.125 mol, because the Mg:O2_22​ ratio is 2:12:12:1.

C

The sum of the relative atomic masses of all atoms in a formula.

D

They show the mole ratio in which substances react.

3.2.2 Amounts of substances in equations (HT only) Flashcards

  1. GCSE
  2. /Chemistry
  3. /3.2.2 Amounts of substances in equations (HT only)

Flashcards for AQA GCSE Chemistry 3.2.2 Amounts of substances in equations (HT only), covering the key terms, definitions and equations you need to recall for Paper 1 and Paper 2. 22 cards, matched to the AQA GCSE Chemistry (8462) specification. Recall questions account for roughly 40% of marks at GCSE Chemistry, so these target the marks you can secure before the paper starts.

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