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Quiz on Relative Formula Mass and Percentage Composition GCSE

Last updated 7 months ago

5 Nsɛmmisa

1

1

1

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3.

Calculate the percentage composition of Carbon in carbon dioxide (CO₂).

1

1

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1.

What is the relative formula mass (RFM) of water (H₂O)?

18 g/mol

16 g/mol

20 g/mol

10 g/mol

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2.

Which of the following are needed to calculate the percentage composition of a compound? (Select all that apply)

Relative Formula Mass of the compound

Relative Atomic Mass of each element in the compound

Number of moles of the compound

Chemical formula of the compound

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4.

The relative formula mass of NaCl is 58.5 g/mol. True or False?

Nokorɛ

Ɛnyɛ ampa

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5.

What is the percentage of hydrogen in ammonia (NH₃)?

11.2%

17.6%

14.0%

38.3%