Question

a.Calculate the mass of 112L Co2, gas kept at STP
( molecules mass =44).
b.How many molecules of Co2 are present in it. ​

Answer 1

Answer:

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Explanation:

Answer :

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

2)1- mole of CO2 - contains= 6.022 x 10^23 molecules. =1.2044 x 10^23 Molecules.

Answer 2

Answer:

a)220g

b)3.011×10^23molecules

Explanation:

By using concept of mole,we get