Calculate the relative molecular weights of the following substances: CH4, Mg (NO3) 2.

Let’s calculate the relative molecular weight of the following substances:
M (CH4) = 12 + 1 * 4 = 12 + 4 = 16 g / mol
M (Mg (NO3) 2) = 24 + 14 * 2 + 16 * 6 = 24 + 28 + 96 = 148 g / mol



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