Which of the following are types of chemical change? SELECT ALL THAT APPLY
a. A substance can go from a solid to a liquid.
b. One compound is transformed into another
compound
C. Two elements form a compound.
d. A compound is broken down into its
elements.

Oxidation is the loss of electrons during a reaction by a molecule, atom or ion. Oxidation occurs when the oxidation state of a molecule, atom or ion is increased. The opposite process is called reduction, which occurs when there is a gain of electrons or the oxidation state of an atom, molecule, or ion decreases.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

the answer is c i took the test