ICSE Class 10 Chemistry 2020 Solved Paper

Calculate the percentage of :
in sodium aluminium fluoride

[ {\Na}_3 {\AlF}_6]

, to the nearest whole number.
[Atomic Mass :

N a=23, A l=27, F=19

]

Question : 67 of 86

Marks: +1, -0

Sodium

Solution:

Percentage of sodium

=\;{3 × 23}/{210} × 100=32.85 ≃ 33 \%

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