A) \[6.023\times {{10}^{22}}\]
B) \[6.012\times {{10}^{23}}\]
C) \[2.323\times {{10}^{20}}\]
D) \[2.323\times {{10}^{23}}\]
Correct Answer: A
Solution :
The atomic weight of sodium = 23 \[\therefore \]gram atomic weight of sodium = 23 g \[\because \] 23 g of sodium contains\[6.023\times {{10}^{23}}\]atoms \[\therefore \]2.3 g sodium contains atoms \[=\frac{6.023\times {{10}^{23}}\times 2.3}{23}\] \[=6.023\times {{10}^{22}}\]atoms
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