Which element(s) are not balanced in this equation?

fe2o3 + 3 co → fe + 3 co2

a.
only the fe is unbalanced.

b.
only the o is unbalanced

c.
fe and o are both unbalanced.

d.
c and o are both unbalanced

Based on the equation and the information in the table, what is the enthalpy of the reaction?

Which statement is best described as a atom

For the reaction, 4 a(g) + 3 b(g) => 2 c(g), the following data were obtained at constant temperature. experiment initial[a],mol/l initial [b],mol/l initial rate,m/min 1 0.200 0.150 5.00 2 0.400 0.150 10.0 3 0.200 0.300 10.0 4 0.400 0.300 20.0 which of the following is the correct rate law for the reaction? 1. rate = k[a]2[b]2 2. rate = k[a][b] 3. rate = k[a]2[b] 4. rate = k[a][b]2