A chemical reaction is shown. SnO2 + H2 - Sn + H20
What is true about this chemical reaction?
O A. It is unbalanced because the mass of the reactants is less than the mass of the products.
OB. It is balanced because the mass of the reactants is equal to the mass of the products.
O C. It is balanced because the number of reactants is equal to the number of products.
O D. It is unbalanced because the mass of the reactants is greater than the mass of the products.

a. hope i'm right

explanation:

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.