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How many grams of perchloric acid, HClO4, are contained in 39.1 g of 74.9 wt% aqueous perchloric acid?

How many grams of water are in the same solution?

Answer :

Answer:

a)29.9 b) 9.81

Explanation:

Wt% = mass of solute / mass of solvent × 100

0.749 = mass of solute / mass of solvent

a) Mass of perchloric acid = 0.749 × 39.1 = 29.29

b) Mass of water = 39.1 - 29.29 = 9.81

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