2 g of magnesium are reacted with excess
dilute acid according to the equation
Mg(s) + 2H+ (aq) + Mg(aq) +H2(g)
(Relative atomic mass of Mg = 24, molar
volume at room temperature and pressure=
24 dm3)
The volume of hydrogen, measured at room
temperature and pressure, that is producedis
(A) 1 000 cm
(B) 1 500 cm
(C) 2000 cm
(D) 24000 cm

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.