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

ICSE Class 10 Chemistry 2020 Solved Paper - Question 70

Question : 70 of 86

Marks: +1, -0

Calculate the number of moles present in

160 {\gm}

{\NaOH}

.
[Atomic Mass :

{\Na}=23, {\H}=1, {\O}=16

]

Solution:

Molecular mass

{\NaOH}

\;=23+16+1=40

\;\text " No. of moles "\;\;=\;{\;\text " wt. in gm "\;}/{\;\text " GMM "\;}

\;=\;{160}/{40}=4

\;=4 \;\text " moles. "\;

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