A student has a container of sand and sugar. What characteristic could be used to separate the mixture?

Sugar will dissolve, so water.

Explanation:

Sugar is a bicubacle food source you could say, sand will not evaporate or dissolve in the water since it is not a 3c2e source. Using water will seperate them.

Heat

Explanation:

Because is you put water and sand in a container you can separated by boiling the water and all the water would evaporate and the sand would stay.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72