A 17.3 g sample of Caso, is found to contain 5.09 g of Ca and 8.13 g of O. Find the mass of sulfur in a sample of CaSo, with a mass of 61.3 g.

4.08g

Explanation:

17.3=(5.09+8.13+S)

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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