What is the mass of 1.7 × 1023 atoms of zinc (zn)?

Answer : The mass of zinc is 18.3 grams.

Explanation :

First we have to calculate the moles of zinc.

As, number of zinc atoms present in 1 mole of zinc

So, number of zinc atoms present in mole of zinc

Now we have to calculate the mass of zinc.

Molar mass of zinc = 65.4 g/mole

Therefore, the mass of zinc is 18.3 grams.

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