Calculate the root-mean-square speed of methane, ch4 (g), at 78°c. root mean square speed = u = [3rt/(molar mass) ] ^ (1/2) think about which r you are going to use and make sure to show the units!

Stage in which a typical star has completely stopped fusion

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.

Which sample at stp has the same number of atoms as 18 liters of ne at stp