1. Find the molar mass of bromine gas (Br₂):
* The atomic mass of bromine (Br) is approximately 79.90 g/mol.
* Since bromine gas is diatomic (Br₂), the molar mass of bromine gas is 2 * 79.90 g/mol = 159.80 g/mol.
2. Use the formula: moles = mass / molar mass
* moles = 37.7 g / 159.80 g/mol
* moles ≈ 0.236 mol
Therefore, there are approximately 0.236 moles of bromine gas in 37.7 grams.
