The answer to your problem is question 3 i just took that test i got it right
Answer:
120 g
Explanation:
mass of reactants+ mass of products=one mole of oxygen= 120 g
Answer: A
Explanation: Diffusion is important to cells because it allows them to gain the useful substances they require to obtain energy and grow, and lets them get rid of waste products. This table shows examples of substances required by cell and associated waste products.