A: CaCO₃ → CaO + CO₂
Oracle Prep sorts past-paper questions by topic, so you can drill Stoichiometry and see which topics are most likely to come up next.
Sign up free →Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content
What is the concentration of a solution containing 1.0g of sodium hydroxide in 250 cm³ of solution?
An element, E, forms a hydride, EH₄, which contains 90.0% by mass of E. If the relative atomic mass of hydrogen is 1,…
A piece of chalk has a mass of 23.0g. Chalk is impure calcium carbonate. When analysed, the chalk is found to contain…
An atom, X, contains 16 protons. Which statement about X is correct?
The diagram shows an apparatus used to compare rates of diffusion. At which labelled position did a white deposit of …
Which statement about conduction of electricity is correct?