Answer:
3.52 g.
Explanation:
- The density of potassium bromide solution is 1.03 g/mL, which means that the mass of 1.0 mL of the solution is 1.03 g.
Using cross multiplication:
1.0 mL of potassium bromide solution weigh → 1.03 g.
41.2 mL of potassium bromide solution weigh → ??? g.
∴ The mass of 41.2 mL of potassium bromide solution = (41,2 mL)(1.03 g) / (1.0 mL) = 42.436 g.
∴ The mass of potassium bromide in the solution = the mass of the solution x weight fraction of potassium bromide = (42.436 g) (0.083) = 3.52 g.
