Whitch option is part of designing a set of experimental procedure
a. p.e. x. awenser only

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.

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same