How does the law of conservation of mass apply to this reaction c2h4 + 3o2 2h2o + 2co2

There are fewer oxygen atoms in the equation than hydrogen or carbon. Only the oxygen needs to be balanced. There are equal numbers of hydrogen and carbon.

clouds form

solid ice forms on leaves.

water droplets form on grass.

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /