A solution has a [H+l] concentration of 8.99 x 10-4M. Calculate the concentration of [OH-] and determine if this solution is acidic or basic.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

hi my dude or dudette

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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