ICSE Class 10 Chemistry 2020 Solved Paper
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Question : 28
Total: 86
Calculate the number of molecules in 4.4 gm CO 2
[Atomic mass ofC = 12 , O = 16
[Atomic mass of
Solution:
Molecular mass of CO 2
= 12 + 16 × 2 = 44 gm
No. of Moles =
=
= 0.1 moles
No. of molecules
= Mole × Avogadros number
= 0.1 × 6.023 × 10 23
= 0.6023 × 10 23 Molecules
No. of molecules
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