Will recieve medal! if 1.2 kilograms of rust form on a bridge in five days, what should be the rate of reaction in grams per hour? (recall that a bar over the number means that zero is significant.) 100(first zero has bar over it) g/hr 0.05 g/hr 0.010 g/hr 10(zero has bar over it) g/hr,

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

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