Someone please help fast!!

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

What term describes technology that operates on an atomic level

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe