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WAEC Chemistry 2022 Paper

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Question : 15

Total: 50

If 5.0 g of marble reacts with 25.0 cm3 hydrochloric acid, which of the following combinations has the fastest reaction rate?

Marble chips and $2.0 \mathrm{mol} \mathrm{dm}^{-3} \mathrm{HCl}_{(a q)}$
Marble chips and $2.5 \mathrm{mol} \mathrm{dm}^{-3} \mathrm{HCl}_{(a q)}$
Powdered marble and $2.5 \mathrm{mol} \mathrm{dm}^{-3}$
$\mathrm{HCl}_{(a q)}$
Powdered marble and $2.0 \mathrm{mol} \mathrm{dm}^{-3}$
$\mathrm{HCl}_{(a q)}$

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