A sample of helium has a volume of 150.0 L at STP. How many moles of helium are in the container?

How do you go from moles to atoms

What role does evidence play in repeating experiments?

Acetyl-CoA labeled with 14C in both of its acetate carbon atoms is incubated with unlabeled oxaloacetate and a crude tissue preparation capable of carrying out the reactions of the citric acid cycle.

Does standard atmospheric pressure correspond to the normal air pressure at sea level.

Newton's first law of motion was a giant leap forward in scientific thought during Newton's time. Even today, the idea is sometimes difficult at first for people to understand.

How many atoms of Hydrogen are in 67.2 L of H2 at STP?

If a 45 mM phosphate solution (solution A) had an absorbance of 1.012. What would be the absorbance if 11 mL of solution A was used to prepare a 20.0 mL of a new phosphate solution. Write answer to three significant figures.

Which choice best describes the specific heat of water compared with that of metals? A) The specific heat of water is less than the specific heat of metals. B) The specific heat of water is about the same as the specific heat of metals.

Which of the following answer choices best describes J. J. Thomson's plum-pudding model? An atom is surrounded by a firm outer shell and contains positively charged particles in its core.

A series of enzymes catalyze the reactions in the metabolic pathway X → Y → Z → A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme. What is substance X?