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Can someone please help me quick !!!
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Can someone please help me quick !!!

Can someone please help me quick !!!-example-1
User Giorgioca
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2 and 4 is the answer. Because (NO3)2 means you multiply the o3 by 2 giving you 6 oxygen. And then number 2 has O6 which equals 6 oxygen.
User MOLAP
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