Can anyone help me I’m super confused and I honestly have no idea what the answer is for any of these

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Draw the structure for 5-isopropyl-2-methyl-3-nonene

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.