The energy level diagram for this reaction is shown below. Explain how the diagram indicates that the reaction is exothermic.
Carbon monoxide, carbon dioxide and methane are each atmospheric pollutants. • State where these gases come from. • Describe the effects that carbon dioxide and methane have on the environment. • State one harmful effect of carbon monoxide on health.
When calcium carbonate decomposes, calcium oxide (lime) and carbon dioxide are formed. State one use of calcium oxide.
Calculate the relative formula mass of calcium carbonate, $\text{CaCO}_3$. Show all your working. Your Periodic Table can help you.
Carbon and magnesium are both insoluble in water. Carbon does not react with hydrochloric acid, whereas magnesium reacts to produce a soluble salt and a gas that escapes into the air. Suggest how you could prepare a pure dry sample of carbon from a mixture of carbon powder and magnesium powder.