During an investigation into the energy changes when different salts dissolve, a student recorded the mass measurements shown in Table 1.
Table 1
| Measurement | Mass in g |
|---|---|
| Mass of empty weighing bottle | 11.45 |
| Mass of weighing bottle + salt | 14.88 |
Use the measurements in Table 1 to calculate the mass of the salt, in grams, added to the water.
94 exam-style questions on Edexcel GCSE Chemistry 8.2 Heat energy changes in chemical reactions, covering 8.2.1 Exothermic and endothermic changes, 8.2.2 Bond breaking, bond making and overall energy change, 8.2.3 Calculating energy change from bond energies, and 8.2.4 Activation energy and reaction profiles. Each one has a worked solution and a mark scheme showing where the marks go.