An unmanned weather station is powered by a hydrogen fuel cell. The cell is supplied with hydrogen and with oxygen from the air, and its only chemical product is water. A report claims that powering the station with this fuel cell causes no carbon dioxide emissions at all.
Which information is needed to check this claim?
How the electricity from the cell is used by the instruments
How the water produced by the cell is removed from the station
How the hydrogen supplied to the cell is produced
How the air supplied to the cell is filtered before use
90 exam-style questions on AQA GCSE Chemistry 5.2 Chemical cells and fuel cells, covering 5.2.1 Cells and batteries, 5.2.2a Fuel cells, and 5.2.2b Half equations for hydrogen fuel cells. Each one has a worked solution and a mark scheme showing where the marks go.