A student records how long it takes for $2.0\,\text{g}$ of magnesium to dissolve in $50\,\text{cm}^3$ of dilute sulfuric acid. Which piece of apparatus is needed to carry out the experiment? 1 stop-clock 2 measuring cylinder 3 thermometer 4 balance
- A1, 2 and 4
- B1 and 2 only
- C1 and 4 only
- D2, 3 and 4