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1 .Therefore, 10 grams of zinc contain 9.264 × 1022 atoms
2.If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the mass of one atom of oxygen. 1 mole of oxygen contains 6.022 × 1023 oxygen atoms. Therefore, 1 atom of oxygen molecule weighs 2.65 × 10-23 grams
3.Hence, 50g aluminium has11. 15 × 1023 atoms. Hence, 50g iron comprises 5.376 × 1023 atoms. It is clear that more number of atoms is present in 50g aluminium than 50g iron.
4.We know that 1 mole of sodium weighs 23g. Hence, 34.5g of sodium contain 1.5 moles of sodium.
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