ICSE Class 10 Chemistry 2020 Solved Paper

Question : 70

Total: 86

Calculate the number of moles present in 160‌gm of NaOH.
[Atomic Mass : Na=23,H=1,O=16 ]

Solution:

Molecular mass NaOH
‌=23+16+1=40
‌ No. of moles ‌‌=‌

‌ wt. in gm ‌

‌ GMM ‌

‌=‌

160

=4
‌=4‌ moles. ‌

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