Which of the following are also compounds? Select all that apply. A.
H2O

B.
CuFeS2

C.
Cl

D.
Mg

E.
KCl

Idon't really understand this can you me and show your work.☺☺[ chemistry b] subject [ electron transfer in lonic bonds]grade( 12)

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.