In a closed system, the reaction between sulfur dioxide, water, and oxygen forms sulfuric acid. Which trend best describes the pH change during this process?
Xinyi saw a poster showing carbon monoxide and asked John, “Where does it come from?” Which is a common source of carbon monoxide in urban areas?
Xinyi gave John an exam-style question: 'Calculate the mass of calcium hydroxide needed to neutralise 1 mole of sulfur dioxide gas.' (Molar mass of Ca(OH)₂ = 74 g/mol)
Xinyi asked John why sulfur dioxide is harmful. What is a harmful effect of sulfur dioxide?
Xinyi is learning about atmospheric gases. She found out that nitrogen makes up 78% of dry air and oxygen about 21%. Which feature of nitrogen explains why it does not easily react in the atmosphere?
A student sets up two sealed flasks: one with oxygen and methane, and one with oxygen and nitrogen dioxide. Both are exposed to UV light. Which flask would most likely contribute to the formation of ground-level ozone?