Asap: due by 10 pm and its the last problem. i'm stuck on it! !

a balloon is filled with 62.6 g of he gas at stp. calculate the volume of the he gas in liters. refer to the periodic table as needed.

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Air can be considered a mixture. which statement does not explain why?

Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a.soft fossils b.mold fossils c.index fossils d.trace fossils