Final answer:
To express 1.0 mol of KBr in grams, multiply by the molar mass of KBr (119.0 g/mol). The mass of KBr is 119.0 grams.
Step-by-step explanation:
The given mass of KBr is 1.0 mol. To express this in grams, we need to use the molar mass of KBr, which is the sum of the atomic masses of potassium (K) and bromine (Br). The atomic mass of K is 39.10 g/mol, and the atomic mass of Br is 79.90 g/mol.
So, the molar mass of KBr is (39.10 g/mol) + (79.90 g/mol) = 119.0 g/mol. To convert 1.0 mol of KBr to grams, we multiply by the molar mass:
1.0 mol KBr * (119.0 g/mol) = 119.0 g KBr