Which property altered during a chemical change is not altered during a physical change? A. composition of the matter

B. temperature of the matter

C. volume of the matter

D. phase of the matter

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

What is the common name for the compound shown here? enter the common name of the compound shown?

What is the chemical formula of magnesium bromide? a. mgbr2 b. mgbr c. mg2br2 d. mg2br