Find the volume of carbon dioxide that is formed during the decomposition of 315 grams of magnesium
| January 3, 2021 | education
Find the volume of carbon dioxide that is formed during the decomposition of 315 grams of magnesium carbonate containing 20% impurities.
The thermal decomposition reaction of magnesium carbonate when heated is described by the following chemical reaction equation:
MgCO3 = MgO + CO2 ↑;
Find the chemical amount of magnesium carbonate. To do this, we divide its weight by the mass of 1 mole of the substance.
M MgCO3 = 24 + 12 + 16 x 3 = 84 grams / mol;
N MgCO3 = 315 x 0.8 / 84 = 3 mol;
The same molar amount of carbon dioxide can theoretically be obtained.
In order to calculate its volume, you need to multiply the amount of substance by the volume of 1 mole of gas (taking a volume of 22.4 liters).
V CO2 = 3 x 22.4 = 67.2 liters.
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