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ICSE Class 10 Chemistry Question 20 of 25

Gay Lussac's Law — Avogadro's Law — Mole Concept — Question 20

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Question 20

Calculate the gram atoms in 46 g of sodium [Na = 23]

Answer

Gram atoms is the relative atomic mass of an element expressed in grams.

Gram atoms=Mass in grams [of sodium]Rel. atomic mass [At. wt.]=4623=2 gram atoms\text{Gram atoms} = \dfrac{\text{Mass in grams [of sodium]}}{\text{Rel. atomic mass [At. wt.]}} \\[0.5em] = \dfrac{46}{23} = 2 \text { gram atoms}

Hence, gram-atoms in 46 g of sodium is 2 g. atoms