Question

1 gram atomic mass ( 1GMM ) of any element contain _____ atom.
CO2 gas kept at STP volume 112 litre (molecular mass=44)

a) The number of molecule of CO2?
b) Calculate the mass of 112 litre CO2?
c) How many molecules of CO2 are present in it? ​

Answer 1

Answer:

Molar mass of carbon dioxide =12+2×16=44 g

Molar mass of O

2

=2×16=32 g

Number of molecules in 32 g oxygen = N

A

Number of molecules in 40 g oxygen =

32

40

×N

A

Given: molecules in 40 g oxygen = molecules of m g carbon dioxide

44

m

×N

A

=

32

40

×N

A

44

m

=

32

40

m=55 g