hi, I have redone this question. Is this right.

Question

How many grams of NO2 will be produced when 5.00 moles of NO react?
5 moles of NO2 produces 5 moles of NO (1:1ratio) mass(g) = 5 moles * 46g/mol
= 230g

Answer 1

Write the equation first:
NO + O2 ----> NO2
Balance the equation:
2NO + O2 -----> 2NO2

5mols of NO will form 5mols of NO2
so, they ask how many grams, that would be 230g, correct! :)

Answer 2

right.