What is an easy way to find oxidation numbers?

Answers

1) according to the law of conservation of mass ,in all chemical reactions total mass is unchanged
Its the second one nonmetals are moldable and easily shaped 
Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.

just did the assignment and the answer was #1 +2 n



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