You have a vial containing 20.0g of oxygen gas. What is the percent composition of oxygen? SELECT AN ANSWER

Cannot be determined without more information

83%

100%

90.8% oxygen

pleas

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

In an effort to address concerns about global warming, a power plant in portland,oregon is designed to take all of its exhaust gases from its boilers and recycle the co2 using the solvay process to make sodium hydrogen carbonate. the reaction is shown below. nh3(g) + h2o(l) + co2(g) + nacl(aq) → nahco3(aq) + nh4cl(aq) how many liters each of nh3 and co2 (both at stp) would be consumed to produce 3.00 kg of sodium bicarbonate? the volume of both nh3 and co2 would be

Calculate the number of molecules present in 0.750 mol of mgo.