Find the number of moles in 3.01 x 10^23 atoms of sodium.

Why does a gold isotope, with an atomic number of 79, require more neutrons to be stable than a sodium isotope, with an atomic number of 11?

Explain how a single population of organism can result in multiple different populations after many generations.

Tenth element period 3

How many grams of CaBr2 would be needed to create 450. mL of a 2.00 M solution? Round off your answer to the nearest gram. Record your answer in the grid below.

5 moles of a monatomic gas has its pressure increased from 105 Pa to 1.5*105 Pa. This process occurs at a constant volume of 0.1 m3. How much work is done by the gas?

Aluminum oxide, Al2O3, is used as a filler for paints and varnishes as well as in the manufacture of electrical insulators. Calculate the number of moles in 47.51 g of Al2O3.

What volume of 2.00 m must be added to 150.0 ml of 1.00 m chloroacetic acid to produce a buffer solution having a ph of 3.30?

Which microscope came out first

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller