calculate the number of grams of nitrogen dioxide that are produced from 2 moles of nitric oxide

Question

2NO(g)+Osub2(g)---->2NOsub2(g)

Answer 1

You don't need to write in the sub part. It isn't ideal but those who use these boards know that KNO3 is KNOsub3. If we want it to be a superscript, we write KNO^3.
2 moles NO [rpdice 2 moles NO2; therefore, 2 moles NO is
2 x molar mass = grams.