Work the following calculations:
a) how many moles are in 23 grams of oxygen (z=8)?
b) what is the mass of 2.5 moles of nitrogen (z=7)?

1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle

Which material burns faster? metal aluminum

Find the mass, in grams, of 5.00*10^23 molecules of f2