By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. At standardized conditions for temperature and pressure, two atoms of the element bind to form dioxygen, a diatomic gas that is colorless, odorless, and tasteless, with the formula O 2.y mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. At standardized conditions for temperature and pressure, two atoms of the element bind to form dioxygen, a diatomic gas that is colorless, odorless, and tasteless, with the formula O 2.
American Opportunity Tax Credit. Students may claim this credit if you are over age 24 as long as you meet the other requirements, e.g. are not claimed as a dependent on someone else return, are attending a degree program half-time or more, and have not already completed four years of college.
But only one Lifetime Learning Credit can be claimed per return. The American Opportunity Tax Credit, however, imposes a requirement that the student for whom the credit is claimed has no felony drug convictions. The Lifetime Learning Credit has no such requirement. We will assume for now that the taxpayer has decided to go ahead and calculate the amount he or she can claim for an American Opportunity Tax Credit. The next question to ask is whether a taxpayerâs adjusted gross income (AGI) falls beneath the phase-out limit.