Most scientists believe that life on planet
Earth began in the oceans.
False
True

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

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 three things does a balanced equation show you?