When using chemical formula it is possible to calculate the percentage composition of the chemical. This can be useful when extracting metals from ores or when making fertilisers for specific plants.
SINGAPORE – An error in the A-level chemistry exam on Wednesday morning was dealt with differently across schools, resulting in students finishing the exam at ...
They were were also advised to give make-up time to account for the duration of the announcement, it said. Three students who spoke to ST but asked not to be identified said candidates at some schools ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback