How many molecules are in 2g of O2?

What state of matter is ice a. liquid b. element c. solid d. gas

Fred is studying a substance that is made out of only one element. this means that

Problem page a jet airplane reaches 846. km/h on a certain flight. what distance does it cover in 13.0 min? set the math up. but don't do any of it. just leave your answer as a math expression. also, be sure your answer includes all the correct unit symbols.