Just revise what you have been taught and reflect on the tips that the teacher might have given to you. I recently had a physics practice test where many students left out questions so try to manage your time effectively and don't stress about it much :)
Hey can anyone help me with this question.
A steel company requires 2 tonnes of Fe. the company decided to mine from a site containing goethite. FeO(OH). which contains 31% of the mineral. how much of the goethite needs to be mined to obtain 2 tonnes of Fe.