The chemical formula for hydrogen bromide is HBr. For 0.045 moles of HBr participating in a reaction, the mass is calculated as 3.64 grams using the molar mass of HBr (80.91 g/mol).
The chemical formula for hydrogen bromide (HBr) indicates that one mole of hydrogen bromide consists of one mole of hydrogen (H) and one mole of bromine (Br). To calculate the mass of hydrogen bromide (HBr) when 0.045 moles participate in a chemical reaction, we need to consider the molar mass of HBr.
The molar mass of hydrogen bromide is calculated by adding the atomic masses of hydrogen and bromine. The atomic mass of hydrogen is approximately 1.01 g/mol, and bromine is approximately 79.90 g/mol. Therefore, the molar mass of hydrogen bromide is 1.01 g/mol + 79.90 g/mol = 80.91 g/mol.
Now, to find the mass of hydrogen bromide when 0.045 moles participate in the reaction, we use the formula:
Mass = Number of moles × Molar mass
Mass = 0.045 moles × 80.91 g/mol
Mass = 3.64 g
Therefore, the mass of hydrogen bromide that participates in the chemical reaction is 3.64 grams.
The question probable may be:
The chemical formula for hydrogen bromide is HBr. A chemist determined by measurements that 0.045 moles of hydrogen bromide participate in a chemical reaction. Calculate the mass of hydrogen bromide that participates. Round your answer to 2 significant digits