Verified answer

SOLUTION:

Step 1: Calculate the molar mass of hydrogen bromide (HBr).

The molar masses of H and Br are 1.008 g and 79.904 g, respectively.

[tex]\begin{aligned} \text{molar mass} & = \text{1.008 g + 79.904 g} \\ & = \text{80.912 g} \end{aligned}[/tex]

Step 2: Calculate the number of moles of hydrogen bromide by using dimensional analysis.

[tex]\begin{aligned} \text{moles of HBr} & = \text{44.2 g HBr} \times \frac{\text{1 mol HBr}}{\text{80.912 g HBr}} \\ & = \boxed{\text{0.546 mol}} \end{aligned}[/tex]

Hence, there are 0.546 mol in 44.2 g of hydrogen bromide.

[tex]\\[/tex]

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