\({\%~of~an~element} = \frac{mass~of~an~element~in~the~compound}{relative~formula~mass~M_r} \times 100\) There are six atoms of hydrogen in the compound, so the mass ...
To calculate the mass of a higher number of moles, or even calculate the number of moles in a certain mass, a formula triangle can be used. Using the formula triangle is straightforward. Simply cover ...
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