The lattice energy of mgcl2 is the energy change for which one of the following processes?
a. mg(s) + cl2(g) → mgcl2(s)
b. mg(g) + 2cl(g) → mgcl2(s)
c. mg2+(s) + 2cl−(g) → mgcl2(g)
d. mg2+(g) + 2cl−(g) → mgcl2(s)
e. mgcl2(aq) → mgcl2(s)

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

14. many depressants reduce small muscle control, making it harder for a. you to steer b. your mind to consider complex problems c. the eye to scan, focus, or stay still d. the kidneys to filter alcohol out of the bloodstream

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.