State one reaction that involves nickel acting as a catalyst.
State one additional chemical property of nickel that is characteristic of a transition element.
Explain why nickel is malleable.
Nickel and other elements are mixed with iron to form the alloy stainless steel. Explain why stainless steel is harder than pure nickel or pure iron. Include a labelled diagram in your answer.
Stainless steel is used for cutlery because it is hard and strong. State one further property that makes stainless steel suitable for cutlery.
Compound X is made up only of nickel, hydrogen and oxygen. X contains 2.2% by mass of hydrogen and 34.5% by mass of oxygen. Calculate the empirical formula of compound X.
For the reversible reaction between carbon monoxide and nickel, $4CO(g)+Ni(s)\rightleftharpoons Ni(CO)_4(g)$, the forward reaction is exothermic. Predict and explain how increasing the pressure affects the position of equilibrium. The temperature stays constant.