--What do you have to do to the coefficients of equation A below to get to equation B? A) 2 SnO2 + 4 H2 2 Sn + 4 H2O
B) SnO2 + 2 H2 Sn + 2 H2O

--Can you divide equation B by another factor and still have it be correct? Why or why not?

--In a complete sentence, write down a method you could use to determine if an equation is written in the correct way.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.