Acanister of gases contains oxygen, nitrogen, and hydrogen.  oxygen's partial pressure is 100 torr, nitrogen's partial pressure is 200 torr, and hydrogen's partial pressure is 50 torr.  what is the total pressure in the canister?

What overall charge must all compounds have

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?