3.0 dm³ of sulfur dioxide is reacted with 2.0 dm³ of oxygen according to the equation below.

2SO₂(g) + O₂(g) → 2SO₃(g)

What volume of sulfur trioxide (in dm³) is formed? (Assume the reaction goes to completion and all gases are measured at the same temperature and pressure.)

Copper can react with nitric acid as follows.

_Cu +_HNO₃ → _Cu(NO₃) ₂ +_H₂O + _NO

What is the coefficient for HNO₃ when the equation is balanced?

Lithium hydroxide reacts with carbon dioxide as follows.

2LiOH + CO₂ → Li₂CO₃ + H₂O

What mass (in grams) of lithium hydroxide is needed to react with 2 mol of carbon dioxide?

How many hydrogen atoms are contained in one mole of ethanol, C₂H₅OH?

What amount of NaCl (in moles) is required to prepare 250 cm³ of a 0.200 mol dm^–3 solution?

Which of the following contains the greatest number of molecules?

Assuming complete reaction, what volume of 0.200 mol dm^–3 HCl(aq) is required to neutralize 25.0 cm³ of 0.200 mol dm^–3 Ba(OH) ₂(aq)?

Consider the following equation.

2C₄H₁₀(g) + 13O₂(g) → 8CO₂(g) + 10H₂O(1)

How many moles of CO₂(g) are produced by the complete combustion of 58 g of butane, C₄H₁₀(g)?

6.0 moles of Fe₂O₃(s) reacts with 9.0 moles of carbon in a blast furnace according to the equation below.

Fe₂O₃(s) + 3C(s) → 2Fe(s) + 3CO(g)

What is the limiting reagent and hence the theoretical yield of iron?

What volume of 0.500 mol dm^–3 HCl(aq) is required to react completely with 10.0 g of calcium carbonate according to the equation below?

CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + H₂O(l) + CO₂(g)

The equation for a reaction occurring in the synthesis of methanol is

CO₂ + 3H₂ → CH₃OH + H₂O

What is the maximum amount of methanol that can be formed from 2 mol of carbon dioxide and 3 mol of hydrogen?