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A solution with density 2 g/cm^3, concentration 1 molar and weight 500 grams, then what is the mass of HNO3 in the solution?

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A solution with density 2 g/cm^3, concentration 1 molar and weight 500 grams, then what is the mass of HNO3 in the solution?

(a) 63 grams

(b) 126 grams

(c) 189 grams

(d) 252 grams

The question was posed to me in an online quiz.

This question is from Concentration in portion Moles, Density & Concentration of Basic Chemical Engineering

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The correct choice is (d) 252 grams

The explanation: Moles of HNO3 = 1/(500/2000) = 4, = > mass of HNO3 = 4*63 = 252 grams.

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