100 cm3 of oxygen is made to react with 50 cm 3 of hydrogen, and...

JAMB 1982

100 cm³ of oxygen is made to react with 50 cm ³ of hydrogen, and the whole reaction mixture was then passed through anhydrous calcium chloride. What is the volume of gas left?

A. 5 cm³
B. 25 cm³
C. 50 cm³
D. 75 cm³
E. 100 cm³

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Correct Answer: Option D

Explanation

2H₂ + O₂ → 2H₂O
2V₃ 1V₃ 2V
50cm 100 —
50cm 25cm³ 50cm³
Volume of gas left = (100 - 25)cm³ of O₂ = 75 cm³ of O₂

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100 cm3 of oxygen is made to react with 50 cm 3 of hydrogen, and...

Correct Answer: Option D

Explanation

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