Question

the mass of 5.6 litre carbon dioxide at STP is

Answer 1

Let me tell you at first that molar weight of CO2 is 12+16*2=44

Now, can we say in this way?

22.4 lit indicates 1 mole at STP.

Therefore, 5.6 lit denotes 0.25 mole.

Therefore, weight of 0.25 mole of CO2 = 44*0.25=11 grams.

Answer 2

Answer:11 gms

Explanation

At S.T.P  

1 mole of CO2 occupies 22.4 lit at S.T.P

Therefore

l lit consists = 1/22.4 moles

5.6 lit consists = 1/22.4 * 5.6

                        = 0.25 moles

molar weight of CO2 is 12+16*2=44

Therefore, weight of 0.25 mole of CO2 = 44*0.25=11 grams.