“why are psrentheses needed to write the formula fouth compound, but not the first three?

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A few days ago

shesxalandslide

Favorite Answer

this question isn’t written very clearly.. give me an example.

i’d be glad to help you.

usually, polyatomic substances are written in parentheses e.g.: (SO4)3

to show that there are (in this example) 3 molecules of SO4

any further questions on chemistry, you can IM me.

just email me if you need further help, and i’ll give you my AIM.

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