Gaseous hydrogen and gaseous iodine react to form gaseous hydrogen iodide. H2(g) + I2(g) ⇌ 2HI(g) In an experiment, 2.0 mol of hydrogen and 2.0 mol of iodine are placed in a sealed container of volume 1.0 dm³. The K value for this reaction under the conditions used is 9.0. How many moles of hydrogen iodide are present at equilibrium?

The table shows the partial pressures in an equilibrium mixture formed by the Haber process. 3H2(g) + N2(g) ⇌ 2NH3(g)…

A reversible reaction is shown. 2NOCl(g) ⇌ 2NO(g) + Cl2(g) ∆H = +77.0 kJ mol⁻¹ Which change in conditions will move t…

Aqueous iron(II) ions, Fe2+(aq), are usually kept in acidic conditions to prevent them readily oxidising to aqueous i…

Which row shows the correct number of covalent bonds in a molecule of methylpropene?

Aluminium chloride exists as Al₂Cl₆ molecules at room temperature. When heated to a high temperature, AlCl₃ molecules…

The table shows the physical properties of four substances. Which substance has a giant covalent structure?