O2 make up of 46.7 percent by mass of Earth's crust. if a sample of Earth's crust has a mass of 325 grams then Determine how many grams of Oxygen are present?
An expandable vessel has 0.864 grams of O2 gas At 4.00 liters volume . if you require a total of 1.36 grams of O2 gas in the vessel then determine how many liters of O2 gas should be mixed at constant temperature and pressure?