Which of the following is the formation reaction for CaO(s) ?
A. CaO(s) Ca(s) + 21O2(g)
B. Ca2+(aq) + O2–(aq) CaO(s)
C. 2 Ca(s) + O2(g) 2CaO(s)
D. Ca(s) + 21O2(g) CaO(s).
E. 2 CaO(s) 2 Ca(s) + O2(g)
I know that you have to create an equation and I believe that the CaO is on the right side, but when breaking up the parts on the left I think it is Ca and o2, but when I balance it I get C, but not sure if that is right.
4 answers
You sound like you're on the right track but with no arrows your equations don't make sense. As for getting C, you CAN'T separate C from Ca.
A. Ca(s)+ 1/2O2(g)arrow Cao(s)
was A. right?
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