How many oxygen molecules are in 96 g of oxygen gas?

- There are molecules of oxygen.

Solution:- It's two step unit conversion where grams are converted to moles and the moles are converted to molecules.

Step 1:- grams to moles-

96g x (1mol/32g) = 3 mole

Step 2:- moles to molecules-

3 mole x (6.022 x 10^23 molecule/1mole) =

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.