Franny decides to build a scale model of the Sun-Earth-Moon system. To get the sizes of the objects approximately correct, she chooses a beach volleyball to represent the Sun, a marble to represent the Earth, and a pea to represent the Moon
She calculates that the distance between the Earth and the Moon should be about 10 centimeters in her model. About how far
should the Sun be from the Earth in Franny's model?

I uploaded the answer to a file hosting. Here's link:

cutt.ly/tz3yDpb

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.