- What is the oxidation number of N in 3NO3- and 3NO2?

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Could someone help me with these math problems? I can't figure them out. Solve the linear equation;
x+2y=15
y=-2x+0 9x-12y=-3
-12x+16y=4? Problem involving math induction! 1. Prove for every integer p, p^2 + 3p + 8 is even.? 0.8 litres water is how many cups? What is 4 x 6? White light is directed at difraction grating at angle normal to gratting.starting at norml to grating 0dgre the odr of red,gren,blue wil be?

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