If the hydrogen ion concentration, [H+), in a solution is 5.39 x 10-8 M,
what is [OH-]?
1.86 x 1021 M
..86 x 10-7 M

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!