Balance the following the chemical equation:
a
1:2:1:1
b
1:1:1:2
c
1:1:2:1
d
2:1:1:1
To balance the chemical equations, we need to ensure that the number of elements on both sides of the equation is the same.
a: 1A + 2B + 1C + 1D → 2A + 2B + C + D
b: A + B + C + 2D → A + B + C + 2D
c: A + B + 2C + D → A + B + 2C + D
d: 2A + B + C + D → 2A + B + C + D