(a)[3]
Calculate the number of molecules of carbon dioxide present in 480 dm$^3$ of clean, dry air at room temperature and pressure. A mole of any gas contains $6.02 \times 10^{23}$ molecules.
(b)[1]
When fuels such as gasoline undergo complete combustion, carbon dioxide is produced. One hydrocarbon found in gasoline has the molecular formula $\text{C}_9\text{H}_{20}$. Write the equation for the complete combustion of $\text{C}_9\text{H}_{20}$.
(c(i))[1]
Give one adverse effect of global warming.
(c(ii))[2]
Describe how the presence of gases such as carbon dioxide in the atmosphere leads to global warming.
(d)[1]
Photosynthesis removes carbon dioxide from the atmosphere. State the word equation for photosynthesis.