The rate of reaction between calcium carbonate and dilute hydrochloric acid is measured in three separate experiments. In experiment 1, the calcium carbonate is powdered, and an excess of hydrochloric acid is used. In experiment 2, the calcium carbonate is in lumps, and an excess of hydrochloric acid is used. In experiment 3, the calcium carbonate is in lumps, less hydrochloric acid is used, and the calcium carbonate is in excess. The results of these experiments are shown. Which statement is correct?

The usual conditions for the Haber process are 250 atm pressure, 450°C and an iron catalyst. Which change in conditio…

Chlorine can be manufactured by the following reaction. 4HCl(g) + O2(g) ⇌ 2H2O(g) + 2Cl2(g) ΔH is negative A mixture …

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Which gas burns in air to form only one product?

The diagram shows apparatus for measuring the volume of hydrogen given off when an excess of dilute hydrochloric acid…

The list shows three chemical reactions. 1 combustion of ethanol 2 fermentation of glucose 3 reaction of ethanol with…