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Feed of a reactor has 0.25 mass fraction of H2O and 0.75 mass fraction of CO2 with rate 4 g/hr, if the product rate is 20 g/hr what is the mass of CO2 in the product side?

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Feed of a reactor has 0.25 mass fraction of H2O and 0.75 mass fraction of CO2 with rate 4 g/hr, if the product rate is 20 g/hr what is the mass of CO2 in the product side?

(a) 3 grams

(b) 9 grams

(c) 15 grams

(d) 21 grams

I got this question during an interview.

I'd like to ask this question from Multiple Component Systems in division Introduction to Material Balances of Basic Chemical Engineering

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Best answer
Correct answer is (c) 15 grams

The best explanation: Mass fraction of CO2 will be same on both sides, => mass of CO2 in the product side = 20*0.75 = 15 grams.

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