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The formula of magnesium chloride is MgCl₂ - OCR Gateway - GCSE Chemistry - Question 4 - 2020 - Paper 1
Question 4
The formula of magnesium chloride is MgCl₂. What is the relative formula mass of magnesium chloride? (Aᵢ: Mg = 24.3, Cl = 35.5) A 59.8 B 95.3 C 119.6 D 84.1 Your ... show full transcript
Worked Solution & Example Answer:The formula of magnesium chloride is MgCl₂ - OCR Gateway - GCSE Chemistry - Question 4 - 2020 - Paper 1
Step 1
Calculate the relative formula mass of magnesium chloride
Answer
To find the relative formula mass of magnesium chloride (MgCl₂), we need to sum the atomic masses of its constituents:
- Identify the elements: Magnesium (Mg) and Chlorine (Cl).
- Determine the atomic masses:
- Magnesium (Mg) = 24.3
- Chlorine (Cl) = 35.5
- Account for the number of each atom: In MgCl₂, there is 1 magnesium atom and 2 chlorine atoms.
- Calculation:
- Mass of Mg: 1 × 24.3 = 24.3
- Mass of Cl: 2 × 35.5 = 71.0
- Sum it up:
Thus, the relative formula mass of magnesium chloride is 95.3.