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What is the pressure in a 10.0-L cylinder filled with 0.485 mol of nitrogen gas at a temperature of 328 K
What is the silver ion concentration in a solution prepared by mixing 467 mL of 0.400 M silver nitrate with 421 mL of 0.503 M sodium phosphate? The Ksp of silver phosphate is 2.8 × 10-18
a galvanic cell made up of cobalt,copper and their M2+ ions has Ecell+o.62 V.if E of the cathode half cell is 0.34,what is the E of anode half cell?
calculate the number of moles in a liquid sample of sodium that has a molar heat of fusion of 2.06 kj/mol given that the sample releases 41.4 kj when it freezes.
Phosphourus, P, is combined with chlorine, Cl2, to give a gaseous compound with the formula PCLx. If you start with 2.097g of P and isolate 9.298g of PCLx, what is the value of x?
Calculate the pH of a solution resulting from the addition of 10.0mL of .10 M NaOH to 50.0 mL of .10M benzoic acid .
the boiling temperture of water decreases by about 3c each for 1000 m rise in altitude. What is the decrease in the boiling temperture in K, F, and R for for 1000 m rise in altitude ?
An aqueous solution of 10.0 g catalase, an enzyme found in the liver, has a volume of 1.00 L at 27 o C. The solutions osmotic pressure at 27 o C is 0.74 torr. Calculate the molar mass of catalase.
a sample of a covalent compound with a mass of 1.350 g lowers the freezing point of 10.00 g of benzene by 3.66 when dissolved. what is the molar mass of the compound?
What volume of 0.200M HCl would be required to neutralize 30.00mL of 0.158M Ca(OH)2? Don't forget stoichiometry.
The vapor pressure of benzene (C6H6) is 120 torr at 27.0C, and its normal boiling point is 80.1C. What is the molar heat of vaporiza- tion of benzene?
120L weather balloon is filled with 5.9 moles of helium has a small leak, if the helium rate is 10mmol/hr, what is the volume after 34 hours.
How long will it take 10.0 mL of Cl2 gas to effuse through a porous barrier if it has been observed that 76.3 minutes are required for 10.0 mL of HCl gas to effuse through the same barrier?
Calculate the pH of the solution made by adding 0.50mol of HOBr and 0.30 mol of KOBr to 1.00 L of water. The value of Ka for HOBr is 2.0×10-9.
What is the percent yield of ferrous sulfide if the actual yield is 220.0 g and the theoretical yield is 275.6 g?
A 100 mL buffer solution initially has 1.00 M HClO (Ka=3.0*10^-8) and .75 M NaClO. Upon the addition of 100 mL of .10 M NaOH, what is the limiting reactant
An analyst planned to use barium chloride to make up 60.0 mL of 0.500 M Ba^2+ solution but his only source of the chloride in stock was 2.66g of BaCl2* 2H20.Knowing that NO3^- , would not interfere
A 1-L flask is filled with 1.25g of argon at 25 °C. A sample of ethane vapor is added to the same flask until the total pressure is 1.10atm . What is the partial pressure of ethane, Pethane, in the
In a HWE reaction, a 1,2-disubstituted alkene was formed in which the olefinic protons exhibited at vicinal coupling of 9.0 Hz in the 1H NMR. what is the stoichiometry of the double bond?
As a student was swirling the flask, some NaOH solution, from buret, spilled on the bench top. What will the effects be on the calculated molarity of NaOH?
the average adult human male has a total blood volume of 5 liter. if the concentration of sodium ion in this individual is 0.135M, what is the mass of sodium ion circulating in the blood .
what is the molar concentration of chloride ions after 225 ml of 0.625 MKCL are mixed with 615 mlof 0.385M MgCl2? The final volume of the solution is 840ml
A 8.65-L container holds a mixture of two gases at 31 °C. The partial pressures of gas A and gas B, respectively, are 0.206 atm and 0.867 atm. If 0.200 mol a third gas is added with no change in
Element Z has two natural isotopes: Z-79 (78.918 amu) and Z-81 (80.916 amu). Calculate the atomic mass of element Z given the abundance of Z-81 is 49.31%.
A solution, which was made by dissolving 62.07 g of a nonelectrolyte in 500 g of water, exhibits a freezing point of -1.86 °C. What is the molecular weight of this nonelectrolyte compound? For w