All of the helium gas in a 2.0 liter balloon at a pressure of 101.3 kpa is added to a 4.0 liter tank that holds argon at 303.9 kpa of pressure. after the two gases are combined, what are the partial pressures of each gas? a) 50.65 kpa he; 253.25 kpa ar b) 50.65 kpa he; 303.9 kpa ar c) 101.3 kpa he; 303.9 kpa ar d) 202.6 kpa he; 303.9 kpa ar

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?