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Post-UTME Chemistry 2008 Objective — Question 10

Question 10 of 10 from the Post-UTME Screening (Post-UTME) Chemistry 2008 Objective paper, with the correct answer and a full explanation.

How many moles of limestone will be required to produce 5.6g of CaO?

A. 0.20mol
B. 0.10molCorrect
C. 1.12mol
D. 0.56mol

Explanation

CaCO3→CaO+CO2 is 1:1. Moles CaO=5.6/56=0.1mol, so 0.1mol limestone is needed.

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