\({\%~of~an~element} = \frac{mass~of~an~element~in~the~compound}{relative~formula~mass~M_r} \times 100\) There are six atoms of hydrogen in the compound, so the mass ...

Part of Combined Science Structures, trends, chemical reactions, quantitative chemistry and analysis The mass of one mole of any substance is numerically equal to its relative formula mass or relative ...