Q. 7 E3.9( 7 Votes )

# Calculate t

Given: Volume of CO2 gas at STP = 112L

Gram molecular mass of CO2 = 44g

First, we will calculate the number of moles so that we can find the mass of CO2 gas

As we know 1 mole of any gas occupies 22.4 litres of volume.

1 mole of NH3 = 22.4 litre

22.4 × Number of moles = 112 litres Number of moles = 5

Now, we can calculate the mass of CO2 gas by applying the formula given: We can write,

Mass of CO2 gas = Number of moles × GMM of CO2

Mass of CO2 gas = 5 × 44g

Mass of CO2 gas = 220g

Thus, mass of 112 L CO2 gas at STP is 220g

Now, number of molecules = Number of moles × 6.022 × 1023

= 5 × 6.022 × 1023

= 3.011 × 1024

Thus, number of molecules of CO2 is 3.011 × 1024

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