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BBC
4y
Chemistry calculations - Edexcel Finding the % of an element in a compound by mass
of~an~element} = \frac{mass~of~an~element~in~the~compound}{relative~formula~mass~M_r} \times 100\) There are six atoms of hydrogen in the compound, so the mass of hydrogen is 6 × 1 = 6.
BBC
1y
Quantitative chemistry - (CCEA) Relative formula mass
work out how many atoms of each element are in the chemical formula add together the A r values for all the atoms of each element ...
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