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Full combustion of a 1.05 gram sample of the compound with the stoichiometric amount of oxygen gas produces a mixture H20 (g) and CO2(g). Explain what is the pressure of this gas mixture when it is contained in a 3.00 liter flask at 127 oC?
a sealed balloon is filled with 1.00 l of helium at 23 degrees celsius and 1.00 atm. the baloon rises to a point in the
Calculate the mass of Sodium Nitrate required to prepare 50cm3 of 0.2 moll-1 solution.
A couple of drops of water were accidentally placed on the properly folded filter paper before its mass was measured.
Determine how many grams of sodium chloride are required to prepare 250. mL of this solution. (if given the density of the saline solution is 1.0 g/mL)?
A 515- sample of unknown solution reacts completely with to form 20.1 . What was the concentration of the solution?
If a mixture of gases contained 78% nitrogen at a pressure of 984 torr and 22% carbon dioxide at 345 torr, what is the total pressure of the system?
What is the molarity of C6H12O6 in an aqueous solution that is prepared by dissolving a 20.95 g sample of impure C6H12O6 in water to make 1,450 mL of solution. Assume that the sample is 93% C6H12O6 by mass. Enter your answer in mol/L, accurate to ..
1. assume that the smallest volume that youcan dispense is 1.0 ml and that you have 3.5 l of an inexpensivediluent. you
dissolving 3.00g of impure CaCO3 in excess HCl produced .656L of CO2- measured at 20C and 782mmHg. calculate the percent by mass of the CaCO3 in the sample.
a sample of calcium hydroxide is placed into a jar containing water. the mass of the calcium hydroxide same is 1.34g.
You are fortunate to land a research position with Dr. Xavier Wray. Your first day in the lab the good doctor asks you to make a liter of 0.1 M citrate buffer pH 3.5 that you will need for the big extract procedure he will show you how to do after..
A box contains 126000 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%
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