Evaluate (754 mm )/(43 s ) to three significant figures and express answer in si units using an appropriate prefix.

solution:

According to the question we need to convert it into SI units.

= 754 mm / 43 s

= 754 * 10 ^ -3 m / 43 s

=0.017534 m/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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