Answer
(a) 47.87 g.
(b) 159.8 g.
(c) 200.59 g.
(d) 18.0 g.
Work Step by Step
For (a) and (c): Use the value given on the periodic table for the element.
(b) According to the periodic table, the mass of each mole of bromine is equal to 79.9 g. Since we have 2:
Mass = $79.9$ g $\times 2 = 159.8$ g.
(d) Molar mass for each hydrogen: $1.0$ g/mol, for each oxygen: $16.0$ g/mol
Mass = $(1.0*2 + 16.0)$ g = $18.0$ g.
