D: 4
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
The equation for the burning of hydrogen in oxygen is shown. 2H2(g) + O2(g) → 2H2O(g) What does this equation indicate?
For which molecules are the empirical and molecular formulae the same? 1. methanoic acid, HCO2H 2. ethanoic acid, CH3…
A 10 cm³ sample of a gaseous hydrocarbon is completely burnt in oxygen. The total volume of the products is 70 cm³. A…
An alloy of copper and zinc is added to an excess of dilute hydrochloric acid. Which observations are correct?
From your knowledge of the manufacture of both aluminium and iron, what is the order of chemical reactivity of alumin…
Which compound will not produce ammonia when heated with ammonium sulfate?