Multiple Choice Question Answer XXVII — task. Science CBSE, Class 9.

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1. How many molecules are present in 9g of water

2.

$Mg$ +

$O_2$

$\overset{Burnig}{\rightarrow}$ ‘X’, ‘X’ is

Answer variants:

$Mg_2O$

$6.08$ ×

$10^2{^3}$ g

$MgO$

$3.01$ ×

$10^2{^3}$ g

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