98. silicon has three naturally occurring isotopes: si-28 with mass 27.9769 amu and a natural abundance of 92.21%, si-29 with mass 28.9765 amu and a natural abundance of 4.69%, and si-30 with mass 29.9737 amu and a natural abundance of 3.10%. calculate the atomic mass of silicon.

The length of a vector arrow represents its magnitude and the point represents its direction true or false apex

Arecipe calls for 1.2 cups of oil. how many liters of oil is this?

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.