Chemical equation help??

Question

The correct coefficients (reading from left to right) to balance the equation (NH4)2Cr2O7 ® Cr2O3 H2O N2 are:

a. 1,2,4,1

b. 2,2,4,1

c. 1,1,4,1

d. 1,4,2,1

Answer 1

c

Answer 2

c. 1, 1, 4, 1

(NH4)2 Cr2O7 -> Cr2O3 + H20 + N2

2 - N - 2

8 - H - 2

2 - Cr - 2

7 - O - 4

Adding the coefficient 4 to H20 would balance it:

2 - N - 2

8 - H - 8

2 - Cr - 2

7 - O - 7

:D