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3.1.2 Relative formula mass

What does relative atomic mass, ArA_rAr​, compare an atom with?

A

For CO2\text{CO}_2CO2​, using Ar(C)=12A_r(\text{C})=12Ar​(C)=12 and Ar(O)=16A_r(\text{O})=16Ar​(O)=16, Mr=12+(2×16)=M_r = 12 + (2 \times 16) = Mr​=12+(2×16)=44.

B

Relative atomic mass, ArA_rAr​, is a weighted mean mass compared with one twelfth of a carbon-12 atom.

C

One twelfth of the mass of a carbon-12 atom.

D

Mass is conserved.

3.1.2 Relative formula mass Flashcards

  1. GCSE
  2. /Chemistry
  3. /3.1.2 Relative formula mass

Flashcards for AQA GCSE Chemistry 3.1.2 Relative formula mass, covering the key terms, definitions and equations you need to recall for Paper 1 and Paper 2. 20 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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