in science lab, Devin and his classmates are asked to determine how many grams of hydorgen and how many grams of oxygen are in 477 grams of water. Devin used what he learned in class to determine that for every 8 grams of oxygen in water, there is 1 gram of hydrogen. If x represents the number of grams of hydrogen, write an exxpression to represent the number of grams of oxygen.