Write a balanced symbol equation for this reaction. [1 mark] This question has been written by a Bitesize consultant as a suggestion to the type of question that may appear in an exam paper.

You will complete eight required practical activities if you are studying GCSE Chemistry and 21 if you are ... The nail in test tube 1 had a mass of 8.45 g at the beginning of the experiment ...

According to the current HKDSE schedule, the chemistry exam is set to take place ... spend no more than 25 minutes on each part of Paper 1, and set aside five minutes to check your answers at ...