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The formula of sulfuric acid is H₂SO₄; What is the relative formula mass, Mₗ, of sulfuric acid? The relative atomic mass, Aₗ, of H is 1, of S is 32 and of O is 16. - OCR Gateway - GCSE Chemistry - Question 5 - 2019 - Paper 1
Question 5
The formula of sulfuric acid is H₂SO₄; What is the relative formula mass, Mₗ, of sulfuric acid? The relative atomic mass, Aₗ, of H is 1, of S is 32 and of O is 16.
Worked Solution & Example Answer:The formula of sulfuric acid is H₂SO₄; What is the relative formula mass, Mₗ, of sulfuric acid? The relative atomic mass, Aₗ, of H is 1, of S is 32 and of O is 16. - OCR Gateway - GCSE Chemistry - Question 5 - 2019 - Paper 1
Step 1
Calculate the relative formula mass of sulfuric acid
Answer
To calculate the relative formula mass (Mₗ) of sulfuric acid (H₂SO₄), we need to sum the relative atomic masses of all the atoms in the formula. The formula contains:
-
2 Hydrogen (H) atoms:
- 2 × 1 = 2
-
1 Sulfur (S) atom:
- 1 × 32 = 32
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4 Oxygen (O) atoms:
- 4 × 16 = 64
Now, we'll add these together:
Thus, the relative formula mass of sulfuric acid is 98.