Apotassium bromide solution is 8.30 % potassium bromide by mass and its density is 1.03 g/ml.
what mass of potassium bromide is contained in 41.2 ml of the solution?
3.52 g
3.32 g
5.11 g
3.42 g

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.

Well to my expert knowledge and my exquisite calculations i think the the negative ion # 412 is the key to sucess

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -