PLEASE HELP DUE IN ONE HOUR!! All of the following have a mass of 79.9 g, EXCEPT:
A: 3.01 x 10^23 Br2 molecules
B: 0.500 moles of Br2 molecules
C: one mole of bromine atoms
D: 0.500 moles of bromine atoms
6
E: 6.02 x 10^23 bromine atoms

How many liters of water can be produced from 5.0liters of butane gas at stp, assuming excess oxygen? c4h10(g) + 02(g) → co2 (e) + h2o (g)

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.

What type of chemical reaction occurs between silver nitrate (agno3) and copper (cu)? the equation i was given is 2agno3 + cu —> 2ag+ cu(no3)2.