Pls help its really hard

When the following equation is balanced using the smallest possible integers, what is the coefficent of oxygen gas? c7h16o(g) + o2(g) → co2(g) + h2o(g) -1 -5 -8 -16 -21

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

Which statement describes james chadwick’s discovery.