How does the law of conservation of mass apply to this reaction: c2h4+o2--> 2h2o+2co2? the equation needs to be balanced. 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. the law of conservation of mass has already been applied. there is an equal number of each element on both sides of the equation. each element needs to be balanced

The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.

Explanation:

took the quiz

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid