Barium can be analyzed by precipitating it as BaSO4 and weighing the precipitate. when a 0.369g sample of a barium compound was treated with excess H2SO4 0.153g of BaSO4 formed. what is the percentage of barium in the compound?

120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890

i'm pretty sure its b i might be wrong though!

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