Chemistry
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GCSE
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The Periodic Table
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How do you...
3 years ago
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Wilburn Herman
1 Answer
Experienced A level Chemistry tutor with Phd in Biochemistry
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You want to make sure that on both sides - reactant and product side - you have equal numbers of atoms of each elements. To achieve this you are only allowed to change the big numbers (coefficients), not the little numbers within the formulae (subscripts).
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