Calculate the volume of carbon (IV)oxide measured at s.t.p, produced when 1 kg of potassium...

JAMB 1991

Calculate the volume of carbon (IV)oxide measured at s.t.p, produced when 1 kg of potassium hydrogen trioxocarbonate (IV) is totally decomposed by heat?

(G.M.V. at s.t.p 22.4 dm³, K = 39, O = 16, C = 12, H = 1)

A. 28 dm³
B. 56 dm³
C. 112 dm³
D. 196 dm³

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Correct Answer: Option C

Explanation

2KHCOdm₃ → K₂CO₃ + H₂O + CO₂
2(39 + 1 + 12 + 48) 22.4 dm³
200 g 22.4 dm³ of CO₂
1000 g (1000) / (200) x 22.4 = 112 dm³

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Calculate the volume of carbon (IV)oxide measured at s.t.p, produced when 1 kg of potassium...

Correct Answer: Option C

Explanation

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