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The formula of ammonium carbonate is (NH₄)₂CO₃ - OCR Gateway - GCSE Chemistry - Question 1 - 2020 - Paper 3
Question 1
The formula of ammonium carbonate is (NH₄)₂CO₃. What is the relative formula mass of ammonium carbonate? (A; C = 12, H = 1, N = 14, O = 16)
Worked Solution & Example Answer:The formula of ammonium carbonate is (NH₄)₂CO₃ - OCR Gateway - GCSE Chemistry - Question 1 - 2020 - Paper 3
Step 1
Calculate the relative formula mass of ammonium carbonate
Answer
To find the relative formula mass of ammonium carbonate, we need to add the atomic masses of each element in the formula (NH₄)₂CO₃.
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Ammonium (NH₄) has a formula of NH₄ where:
- Nitrogen (N) = 14
- Hydrogen (H) = 1 × 4 = 4 Thus, the total mass of ammonium part is:
Since there are 2 ammonium ions in the formula, multiply by 2:
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Carbon (C) in the formula contributes:
- Carbon (C) = 12
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Oxygen (O) in the carbonate (CO₃) part consists of:
- Oxygen (O) = 16 × 3 = 48
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Now, sum all contributions:
Therefore, the relative formula mass of ammonium carbonate (NH₄)₂CO₃ is 96.