What is the mass in grams of 1.50 x 10^-2 mol molecular oxygen

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

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.

i think it is true since you can test the answer and can use observations to complete it.