(a)[1]
Deduce the volume of carbon dioxide gas at 35 s from the graph.
(b)[2]
Draw a line on the grid to illustrate how the volume of carbon dioxide gas changes with time.
(c)[2]
Describe the effect on the rate of reaction of using a higher concentration of hydrochloric acid and using powdered calcium carbonate.
(d)[1]
If 0.11 g of calcium carbonate gives 25 $\text{cm}^3$ of carbon dioxide gas, Calculate the mass of calcium carbonate needed to give 100 $\text{cm}^3$ of carbon dioxide gas.
(e)[1]
State one application of calcium carbonate.