Question

Q. In a sample of 22g of CO2, find the number of molecule of CO2.​

Answer 1

Answer:

The mass number of CO2 = 2x16 + 12 =44 so one mole of C02 has a mass of 44g. Two moles of CO2 weighs 2 x 44 = 88g. The number of moles in 22g of CO2 = 22/44 = 0.5.

Answer 2

Answer:

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Explanation:

molecular mass of co2=44gm

no. of moles(n) =given mass/molecular mass

n=22/44=1/2

1 mole contains 6.022×10^23 molecules

1/2 moles contains (6.022×10^23)/2molecules

=3.011×10^23molecules

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