Pupil sheet · Formulae and equations
Formulae and equations — final check
Name ______________________ Date ____________
Work alone, with the lesson closed. Answer every question; there are no hints.
1. state / define / deduce
(a) Write the formulae of methane, sodium hydroxide and nitrogen gas. (b) Define the molecular formula of a compound. (c) A molecule of propanone has three carbon atoms, six hydrogen atoms and one oxygen atom. Write its molecular formula. (d) Supplement: write the empirical formula of hexene, C6H12. (e) Supplement: deduce the formula of iron(III) oxide from its ions, Fe3+ and O2−.
(a) Three formulae
(b) Molecular formula
(c) Propanone
(d) Supplement: empirical formula of hexene
(e) Supplement: iron(III) oxide
2. construct
Propane, C3H8, is a gas. It burns completely in oxygen to make carbon dioxide and water, and the products are cooled to room temperature. (a) Write the word equation. (b) Write the balanced symbol equation with state symbols.
(a) Word equation
(b) Symbol equation with state symbols
3. construct / deduce
Supplement. A strip of magnesium ribbon is dropped into dilute hydrochloric acid. It fizzes as hydrogen gas is given off and dissolves, leaving a solution of magnesium chloride. (a) Write the balanced symbol equation with state symbols. (b) Write the ionic equation.
(a) Symbol equation with state symbols
(b) Ionic equation