The mass of 25 cm 3 of brass is 210 g calculate the density of brass

Explanation:

The density of a substance can be found by using the formula

From the question we have

We have the final answer as

Hope this helps you

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.

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