Question

Which of the following equations is balanced correctly?

I. 2 Ag2O → 4 Ag + O2

II. Cu + H2O → CuO + H2

III. Zn + HCl → ZnCl2 + H2

IV. 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O

A.
II and III only
B.
I, II, III, and IV
C.
II, III, and IV only
D.
I, II, and IV only

Answer 1

Its D because III needs to be 2HCL not just HCL :)

Answer 2

answer is  D. The HCl in equation III needs a 2 in front of it