NaHCO3 is the active ingredient in baking soda. How many grams of oxygen are in 0.20g of NaHCO3?
Select one:
O a. 2.38e-38
O b. 0.11g
O c. 0.0138
O d. 0.0078
O e. 0.0388

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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