4. For the reaction whose balanced equation is as follows, find the number of grams of sodium that must react to produce 420 grams of sodium oxide.
4 Na + O2 → 2 Na,

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

i believe the answer is three water molecules

answerambulatory;