If 34.00 moles of oxygen and volume of 2.40 L. If you add 12 more grams of oxygen what will be the new volume

Assuming that the gas is at standard temperature and pressure (STP), one mole of any gas occupies 22.4 L . This means the number of moles of O2 is 222.4=0.089 mol .Explanation:

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter