31. What is the percent by mass of a solution if 60. g
of acetic acid are added to 90. g of water?
(1) 20% (2) 30% (3) 40% (4) 67%

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

The rules of engagement (roe) working group is often used to (select all that apply.)

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.