Calculate the total number of ions in 5.30 g5.30\text{ g}5.30 g of sodium carbonate, Na2CO3\text{Na}_2\text{CO}_3Na2CO3. Use the following values: Relative atomic mass of sodium, Ar(Na)=23.0A_r(\text{Na}) = 23.0Ar(Na)=23.0, Relative atomic mass of carbon, Ar(C)=12.0A_r(\text{C}) = 12.0Ar(C)=12.0, Relative atomic mass of oxygen, Ar(O)=16.0A_r(\text{O}) = 16.0Ar(O)=16.0, Avogadro constant, NA=6.02×1023 mol−1N_A = 6.02 \times 10^{23}\text{ mol}^{-1}NA=6.02×1023 mol−1. Give your answer to 3 significant figures in scientific notation.
199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.