Question

A glass jar contains 2.2g of co2 gas. Calculate the following:
i)molar mass of co2(Atomic mass of c=12u, O=12u)
ii)How many moles of co2 are present in the glass jar
iii)how many molecules of co2 are present in the sample

Answer 1

Explanation:

Gram molecular weight of CO

2

= 12+2 × 16 = 44g.

Now, 44g of CO

2

contains 6.023×10

23

molecules.

∴ 11g of CO

2

contains =

44

6.023×10

23

×11

= 1.51×10

23

molecules.