Is the number of total molecules on the side of a balanced equation always equal to the number of total molecules on the right side of the equation?

What does the cell nucleus do or, how does it function?

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume