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To the correct number of significant figures a 323 gram solid cube of mercury (II) oxide...

To the correct number of significant figures a 323 gram solid cube of mercury (II) oxide has a density of 4.2 x 104 ng/m3 .

a) What is the length of one side of the cube in cm?

b) The mercury (II) oxide completely dissociates and forms liquid mercury and oxygen gas. Write a balanced chemical equation and indicate if this process is a chemical or physical change?

c) The oxygen gas escapes and now you are left with liquid grey substance. Is this grey substance a compound, element, homogeneous mixture or heterogeneous mixture

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Answer #1

(a) density = mass / volume

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