A flask collects a sample of air near a volcanic vent to monitor greenhouse gas emissions. The total volume of the air sample is 16.0 dm3, which is found to contain 7.2 × 10-2 dm3 of carbon dioxide (CO2\text{CO}_2CO2).
What is the percentage of carbon dioxide in this air sample?
0.0045%0.0045\%0.0045%
0.045%0.045\%0.045%
0.45%0.45\%0.45%
4.5%4.5\%4.5%
32 exam-style questions on OCR GCSE Chemistry Interpreting and interacting with earth systems. Each one has a worked solution and a mark scheme showing where the marks go.