Topic Content:
- Mass-Volume Calculations
In Mass-Volume Calculations a mass is given and a volume is to be found. This group of calculations depends upon the use of molar volume. The molar volume of any gas at standard temperature and pressure is 22.4 dm3
Example 6.4.1:
Calculate the volume of Carbon[IV]oxide gas at STP when 5 g of zinc trioxocarbonate[V] is heated strongly.
[Zn = 65, C = 12, O = 16, molar volume = 22.4 dm3 at STP]
Solution
ZnCO3[s] → ZnO[s] + CO2[g]
1 mole of ZnCO3[s] ⇒ 1 mole of CO2[g] at STP
1 × [65 + 12 + (16 × 3)] g of ZnCO3[s] ⇒ 1 × 22.4 dm3 of CO2 at STP
125 g of ZnCO3[s] ⇒ 22.4 dm3 of CO2 at STP
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