Bromine, Br, is what we call a "molecular element" that must exist as Br2

Question

. Using the mass from the interactive periodic table, calculate the molar mass, of one mole of Br2
. To find the molar mass remember you just locate the mass on the periodic table and find the number of atoms of each element using the subscripts. The subscript will tell you what to multiply by for the final answer. State your final answer in the blank. Please carry your answer out to the tenths place, or one decimal. The units of g/mol are listed for you.(1 point)
___ g/mol

Answer 1

To calculate the molar mass of \( \text{Br}_2 \), you'll need to follow these steps:

1. Locate the atomic mass of bromine (Br) on the periodic table. The atomic mass of bromine is approximately 79.9 g/mol.

2. Since the molecular formula for bromine as a diatomic molecule is \( \text{Br}_2 \), this means there are 2 bromine atoms in one molecule of bromine.

3. To find the molar mass of \( \text{Br}_2 \): \[ \text{Molar Mass of } \text{Br}_2 = 2 \times \text{Atomic Mass of Br} = 2 \times 79.9 , \text{g/mol} = 159.8 , \text{g/mol} \]

Therefore, the molar mass of \( \text{Br}_2 \) is 159.8 g/mol.