Deduce the percentage of water vapour in this biogas sample.
Complete the dot-and-cross diagram to show the electron arrangement in a molecule of water. Include only the outer shell electrons.
Describe a chemical test for water. State both the test and the observation.
Balance the chemical equation for the oxidation of methane to form hydrogen.\n\n$\dots\text{CH}_4 + \text{O}_2 \rightarrow 2\text{CO} + \dots\text{H}_2$
Which one of these compounds is in the same homologous series as methane? Draw a circle around the correct answer.\n\nbutane butene methanoic acid methanol
Match the fractions on the left to their uses on the right. The first one is already completed for you.
Describe the fractional distillation of petroleum. In your answer, state the physical property on which separation of the fractions depends and describe how the distillation is carried out to separate the fractions.
On the structure shown, circle the carboxylic acid functional group.
How many different types of atoms are found in compound M?