A closed gas system initially has pressure and temperature of 0.87 atm and 242 K with the volume unknown. If the same closed system has values of 0.50 atm, 1.57 L and 89
deg C, what was the initial volume in L?
Put the answer to 2 decimal places.

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.

List the path of the respiratory system