Choose the reaction that represents DHf for Ca(NO3)2 ......?

A

Angie

New member
A. Ca(s) + 2 N (g) + 6 O (g) --> Ca (NO3) 2 (s)
B. Ca 2+ (aq) + 2 NO3- (aq) --> Ca (NO3) 2 (aq)
C. Ca (s) + N2 (g) + 3O2 (g) ---> Ca (NO3) 2 (s)
D. Ca (NO3)2 (s) ---> Ca (s) + N2 (g) + 3 O 2 (g)
E. Ca (NO3)2 (aq) ---> Ca 2+ (aq) + 2 NO3- (aq)
 
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