Which of the following is a mixture? steel water oxygen gold

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.