greg m
4NH3 + 5O2 -----> 4NO + 6HOH
2Cu + O2 ---> 2CuOCopper + Oxygen ---> Copper II oxide
2h2s + o2 -> 2s + 2h2o
SO2 + O = SO3
element
Steel + Oxygen = Steel Oxide
3 O2(g) + 2 S(s) --> 2 SO3(g) (This turns into liquid below 45°C)
2Li + O --> Li2O
The complete combustion of ethanol in oxygen proceeds according to the balanced equation C2H6O + 3 O2 -> 2 CO2 + 3 H2O.
If the equation has the same number of each type of atom on both sides of the arrow, it is balanced. If the number of atoms on each side of the arrow is not the same, the equation is not balanced. For example, in the equation H2 + O2 -->H2O, there are two hydrogen atoms and two oxygen atoms on the left, and two hydrogen atoms and one oxygen atom on the right. Therefore, the equation is not balanced. However, in the equation 2H2 + O2 -->2H2O, there are four hydrogen atoms and two oxygen atoms on the left and four hydrogen atoms and two oxygen atoms on the right, so the equation is balanced.
4K + O2 = 2K2O so the "coefficient" is 1
2Cu+O2 ---> 2CUO