A 27.6ml sample of PH3 used in the manufacture of a flame retardant chemicals is obtained at stp. a)what is the mass of this gas in mg? b) how many molecules of PH3 are present ? How many atoms are present all together
a) The mass of the gas in mg is 27.6 x 0.08988 = 2.48 mg.
b) There are 2.48 x 6.022 x 10^23 molecules of PH3 present, and 6.022 x 10^23 atoms of PH3 present all together.