Earth’s mantle is a.
a layer of molten metal.
b.
a layer of hot rock.
c.
a dense ball of solid metal.
d.
a layer of rock that forms Earth’s outer skin.

What is the temperature of one mole of helium gas at stp?

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.

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