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Determine the theoretical yield in grams and the percent yield, if 21.8 g of K2CO3 is produced form reacting 27.8g K2O with 8.0 L of CO2 at STP. The molar mass of K2O is 94.2 g/mol and K2CO3 is 138.22 g/Ml?
Calculate the molar mass of a vapor that has a density of 1.58 g/L at 23.2 oC and 610. torr. 2. If the volume of a container is 39.4 L. and the container holds a gas at 13.2 oC. and 7.00x104 torr.
What volume of gas, measured at 690 torr and 40 degrees celcius, is required to form 29g of NaCl?
Determine the heat of formation of sulfuric acid, H2SO4 (l) from the following thermochemical equations: S8(s) + 8 O2(g)-->8SO2(g) H= -2374.6 kJ S8(s) + 12O2(g)-->8SO3(g) H=-3165.8 kJ H2O(l)+SO3(g)-->H2SO4(l) H=-132.3 kJ 2H2(g)+O2(g)-->2H2O(l) H=..
Explain why it is preferable to take the geometric mean rather than the arithmetic mean when defining mean activity
A 14.5 gram sample of gas is found to have a volume of 2.8 liters at 275 K and 1.10 atm. What is the molar mass of this gas?
how much 0.500 M Au(NO3)3 solution would you need to prepare to accomplish this? 3) If the price of the base metal is negligible, and the price of gold is $ 1791.05/oz. ( as of the date of this publication), what is the value of the medallion?
Compute the hydroxide ion concentration in a NH 3 solution that is 0.091 M and 0.028 M NH 4 Cl. Kb of NH 3 is 1.8 x 10 -5 .
Write the structure for the organic reagents and products, name the products and indicate stereochemistry when appropriate
If you have unknown sample which either benzoic acid or 2-naphthol, describe a method to determine the identity of the unknown compund.
If given Cu(OH)2=CuO + ? and separately CuO + HCl= CuCl2 + ? What are the finished equations?
In doing the Calorimetry experiment, a student did not follow the directions exactly. How would the experiment be affected if no plot of temperature was carried out. Instead the student used the value of the water just after mixing with the metal ..
If 100mL of 0.01 M CaCl2, 100mL of 0.01 M Sr(NO3)2 and 100 mL of 0.01 M Na2SO4 are mixed together; what is the Ca2+ concentrationin solution and which precipitates will form?
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