How many grams of o2 are needed to react with 120g of no?

I'm going to suppose that your chemical reaction is:



The molecular mass of NO is equal to (14 + 16) = 30 g/mol. Oxygen has a molecular mass of (16·2) = 32 g/mol. As you can see in the previous equation: 2·30 = 60 g of NO will need to 32 g of in order to complete the reaction. Let's go to do a mathematical proportion:

Neither model is able to show the reactivity of potassium.

Yeah, but what are you trying to ask?