The table gives the percentage composition of the gases in a biogas sample. Deduce the percentage of nitrogen in this biogas sample.
Balance the equation for the complete combustion of methane. $\text{CH}_4 + \ldots \text{O}_2 \rightarrow \text{CO}_2 + \ldots \text{H}_2\text{O}$
Which one of these compounds is in the same homologous series as methane? Draw a circle around the correct answer. methanoic acid methanol propane propanol propene
Link the fractions on the left to their uses on the right. The first match has already been completed for you.
Draw a dot-and-cross diagram to show how the electrons are arranged in a hydrogen molecule.
State one application of hydrogen.
On the structure shown, circle the carboxylic acid functional group.
How many different atom types are present in compound C?
Describe how ethanol is manufactured by fermentation. In your answer, include the names of the substances required for fermentation and the conditions needed for fermentation.