Calculate the molar mass of each of the following:

$$\begin{array}{llll}{\text { (a) } \operatorname{Sr}(\mathrm{OH})_{2}} & {\text { (b) } \mathrm{N}_{2} \mathrm{O}_{3}} & {\text { (c) } \mathrm{NaClO}_{3}} & {\text { (d) } \mathrm{Cr}_{2} \mathrm{O}_{3}}\end{array}$$

a) $\operatorname{Mr}\left(\operatorname{Sr}(\mathrm{OH})_{2}\right)=121,62 \mathrm{g} / \mathrm{mol}$

b) $\operatorname{Mr}\left(\mathrm{N}_{2} \mathrm{O}_{3}\right)=76,02 \mathrm{g} / \mathrm{mol}$

c) $\operatorname{Mr}\left(\mathrm{NaClO}_{3}\right)=106,44 \mathrm{g} / \mathrm{mol}$

d) $\operatorname{Mr}\left(\mathrm{Cr}_{2} \mathrm{O}_{3}\right)=98 \mathrm{g} / \mathrm{mol}$

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Carleton College

University of Kentucky

Brown University

University of Toronto

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