A 12.6g sample of Na2so3 mixed with 30g sample of mgso4 what is the total mass of oxygen present in the mixture??
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Answer: The total mass of oxygen is 20.8 grams.
Explanation:
- Molar mass of Na₂SO₃ = 126g
126g has 48 g of oxygen
12.6 g of sodium sulfate contains 48/126×12.6 = 4.8g
- Molar mass of Magnesium sulfate = 120g
120g of magnesium sulfate has 64g of oxygen
30g magnesium sulfate has 64/120×30 = 16g
- Total mass of oxygen in mixture = 4.8+16 = 20.8g
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