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In a process, two feed streams are there and one output stream. The feed streams have the feed rates as 500 kg/sec and 600 kg/sec. If the output stream rate is 800 kg/s, what is the mass stored in the chamber in five seconds?

(a) 300 kg

(b) 500 kg

(c) 1000 kg

(d) 1500 kg

This question was posed to me in unit test.

This is a very interesting question from Material Balances -I in section Material Balances of Chemical Process Calculation

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Correct option is (d) 1500 kg

To explain: For five seconds, Accumulation = 5(500+600-800) Kg.

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