4) I have a 52.4 g sample of lead with a volume of 10 cm3. What is its density?

Explanation:

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

From the question

mass = 52.4 g

volume = 10 cm³

Substitute the values into the above formula and solve for the density

That's

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.

that's it!

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~ trueboss72