18.4g of hydrochloric acid is dissolved in 90 ml of water
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Explanation:
no. of atoms = 0.368
density = 0.204 g/ ml
density = m/v
= 18.4/ 90. = 0.204 g/ml
no. of atoms = given mass /molar mass
= 18.4/ 50 = 0.368
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