4Fe + 302 - 2Fe2O3
Iron combines with oxygen to form rust. Given the chemical reaction, how many grams of 4Fe + 302 would produce 10
g of rust?

2. how is heavy water different from normal water

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?