What is the number of moles of H2O that contains 3.01 x 10^24 molecules?

law of conservation of matter

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.