Calculate the work (kJ) done during a reaction in which the internal volume expands from 18 L to 49 L against a vacuum (an outside pressure of 0 atm).

2) Pick the statement about the Bohr model of the hydrogen atom that is NOT true. A) The energy of each Bohr orbit is quantized. B) An electron in a stationary state does not emit radiation.

Substance a has a mass of 8 grams with a volume of 10 mL what is the density of substance A

Calculate the final pressure inside a scuba tank after it cools from 100c to 25.0c. The initial pressure in the tank is 130.0 atm

A water treatment plant needs to maintain the ph of the water in the reservoir at a certain level. To monitor this, you should

The SI unit for quantity of radioactive materials is:

Which of the following radioactive emissions is the least penetrating, aloha particles, beta particles or gamma rays

The three major groups p On the periodic table are the

Which of the following has the greatest mass, in grams? a. 1 atom of lead (Pb) b. 0.5 mol copper (Cu) atoms c. 0.3 mol gold (Au) atoms d. 25 atoms of mercury (Hg)

Which one is not a sedimentery rock a.) sandstone b.) limestone c.) quartz d. (coal

Which group is more reactive than the alkaline earth metals?