Use the unbalanced equation below to answer the question that follows:
al+o2 →al2o3

which of the following sets of coefficients would correctly balance the equation and why? (3b dok 3)

a.
2, 2, 2; because you must use the same coefficient for each substance

b.
2, 3, 2; because you must have the same number of atoms on each side of the equation

c.
4, 3, 2; because you may have the same number of atoms on each side of the equation

d.
4, 3, 2; because you must have the same number of compounds on each side of the equation