Q.

Volume of CO2 obtained at STP by the complete decomposition of 8.4 g of MgCO3 (90% pure) at STP will be

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a

2.91 L

b

1.46 L

c

3.42 L

d

2.02 L

answer is A.

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Detailed Solution

MgCO3(s)ΔMgO(s)+CO2(g) 84g                                 1 mole 
Volume of CO2 obtain at STP
=8.484×90100×22.4 L =2.016L2.02L
 

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