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A mixture of He and Ar is placed in a 2.00 L flask at 250 K. the partial pressure of the He is 4.0 atm and the partial pressure of Ar is 6.0 atm. What is the mole fraction of He?
While 125.0mL of a 0.130 M aqueous solution of aluminum nitrate is mixed with 100.0mL of a 0.218 M aqueous solution of potassium carbonate solid aluminum carbonate precipitates.
How many liters of O2 gas measured at 861 torr and 250.0°C are formed by the decomposition of 200. g of KClO. (You will need a balanced equation where KClO is the reactant. The other product is KCl.)
A compressed air tank carried by scuba divers has a volume of 7.0 L and a pressure of 150 atm at 20C. What is the volume of air in the tank (in liters) at STP
In a purity check for industrial diamonds, a 10.25 carat diamond is heated to 74.21 oC and immersed in 26.05 g of water in a constant pressure calorimeter.
The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of : (1) Lead (..
1) 10 mL of 0.05 M amino acid (Ka1=4.69x10^-3 and Ka2=1.79x10^-10) is titrated with 0.05 M HCl. Sketch a titration curve. (there's no need to actually sketch the curve; I just need to calculate the pH values needed to sketch a curve)
solutions of ag plus, cu 2 plus, fe 3plus, and Ti 4 plus are electrolyzed with the constant current until 0.10 mole of metal is deposited. which will require the greatest lenght of time.
Calculate the maximum concentration in M of silver ions in a solution that contains 0.025 M CO3^2-. The ksp of AG2CO3 is 8.1 x 10^-12
What are the molecular, total ionic and net ionic equations when barium nitrate is mixed with sodium phosphate
Consider the reaction: CO(g)+Cl2(g)===COCl2(g) Keq= 2.9×10^10 at 25 degress celsius A 5.89 -L flask containing an equilibrium reaction mixture has [CO]= 1.4×10^?6M and = 6.3×10^?7M How much COCl2 in grams is in the equilibrium mixture
Write a balanced chemical reaction for the formation of a free fatty acid from a soap molecule under acidic conditions.
write the balanced chemical equation and corresponding equilibrium expression for the each step in the ionization of phosphoric acid ( apolyprotic acid ) in water?
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