eWorksheet on balancing equations. Students have to insert the stoichiometric amounts for each substance. There is instant feedback as to whether the answer is correct or incorrect along with a percentage score.
I usually hide the feedback cells and the score and protect the worksheet so the students submit their answers and I simply unhide the cells and email back their answers and score for them to correct if necessary.
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Many thanks for an excellent resource. If I can find time I may try to make a version which randomises the questions individual students see.
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