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Question
Calculate the number of moles present in 160 gm of NaOH.
(Atomic Mass: Na = 23, Н = 1, O = 16]
Numerical
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Solution
Gram molecular mass of NaOH = 23 + 16 + 1
= 40 g
40 g of NaOH = 1 mole
∴ 160 g of NaOH = `160/40`
= 4 moles
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Chapter 5: Mole Concept and Stoichiometry - Questions from ICSE Examinations [Page 122]
