Question

Which of the following weighs least:

a) 2.24 litres of CO2 at N.T.P.

b) 6.02 x 1021 molecules of CO2

c) 1g of CO2

d) 6.02 x 1022 atoms of carbon.
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Answer 1

Explanation:

22.4 litres at ntp=1 mole

2.24 l = 0.1 mol

1 mole of co2= 12+16+16=44g

0.1 mol= 4.4g=2.24 litres of co2

6.02*1023=1 mole

6.02*1021=0.01 mol

=0.44g.

1g=1g

1 mole of carbon atoms=12 g

6.02x1023=1mol

6.02x1022=0.1 mol= 1.2g

thereofore option b is ans

Answer 2

Answer:

Explanation:

B