B: 0.0798
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
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…
Which statement most clearly indicates that diamond and graphite are forms of carbon?
Four substances have the following electrical properties. What are these four substances?
The proton number of element X is 6. The proton number of element Y is 9. What is the formula of a compound of these …
Which ion reacts with aqueous ammonia to give a precipitate that dissolves in an excess of ammonia?