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Q.

If a room has dimensions 3m×4m×5m  what is the mass of air in the room if density of air at NTP is 1.3×kg/m3

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a

78 kg

b

87 kg

c

8 kg

d

8.7 kg

answer is A.

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Detailed Solution

m=ρ×V=1.3×3×4×5=78 kg
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If a room has dimensions 3m×4m×5m  what is the mass of air in the room if density of air at NTP is 1.3×kg/m3