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A chemist prepares an aqueous solution of magnesium chloride using a redox reaction between magnesium and dilute hydrochloric acid. The equation for the reaction is shown below:
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
The chemist reacts 8.1 x 10+g of magnesium with a solution of 0.500 mol dm-3 hydrochloric acid.
a) Calculate the amount, in moles, of magnesium in 8.1 x 10-'g of pure magnesium. Give your answer to an appropriate number of significant figures. 2 marks
b) Calculate the amount, in moles of hydrochloric acid required to react with 8.1 x 10-'g of magnesium. Give your answer to an appropriate number of significant figures. 1 mark
Answers: 2
Chemistry, 22.06.2019 14:00, jivsf
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.
Answers: 3
Chemistry, 22.06.2019 21:30, steven0448
An atomic nucleus is composed ofa)protons. b)protons and neutrons. c)protons and electrons. d)protons, neutrons, and electrons.
Answers: 1
PLEASE HELP ASAP I NEED TO HAND IN TOMORROW
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