How many moles are there in a 7.00 L of a gas at a certain temperature and pressure, if 0.369 moles of the same gas at the same conditions occupies 9.75L?

200

Explanation:

It is 200 because 1 mole +1mole is a rat and a rat is 200.

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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