Asubstance that speeds up the rate of a chemical reaction is called
a. a catalyst.
b. a lipid.
c. a molecule.
d. an element

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device