Facilitated diffusion of magnesium ions (Mg ) would occur OUT of a cell if the Mg concentration was outside the cell than inside, and . a. higher, Mg could move through a transport protein across the membrane b. higher, Mg could move directly through the phospholipid bilayer of the membrane c. lower, Mg could move through a transport protein across the membrane d. the same, Mg could move directly through the phospholipid bilayer of the membrane e. lower, Mg could move directly through the phospholipid bilayer of the membrane

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.

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.

What is the volume of 2.5 moles of nitrogen gas (n2)at standard temperature and pressure (stp)?