NEED HELP ANSWERING THIS QUESTION I-Ö-I I--I.
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Which is the correct Lewis structure for ethylene, C2H4?
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Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: