(a(i))[2]
Complete the chemical equation for this reaction. $\text{CaCO}_3 \rightarrow [BLANK] + [BLANK]$
(a(ii))[1]
What type of chemical reaction is this?
(a(iii))[2]
Find the relative formula mass of calcium carbonate. Show your working clearly.
(b)[2]
State two differences between a compound and a mixture.
(c)[1]
Use the information in the table to suggest why concrete must be reinforced with steel when it is used to make bridges.
(d)[2]
Which two substances are needed for steel to rust?