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A balloon is filled with H2 gas to a volume of 2.60 L at 27°C. The balloon is then placed in liquid nitrogen until its temperature reaches -125 °C. What is the volume of the cooled balloon?
ferrocene a substance used as a gasoline additive but which is also being studied because it shows some anticancer
Hydrochloric acid is added to zinc. How many mls of 0.500 M HCl are needed to react completely with 25.0 g of zinc metal
a mixture of co co2 and o2 is contained within a 275 ml flask at 0c. if the total pressure is 780 torr the co has a
The freezing point depression constant of water is -1.86 degrees C/m. If 7.50 g NaCl is dissolved in 45.0 g H2O, the freezing point is changed by -9.71 degrees C. Calculate the van't Hoff factor for NaCl.
Given the following half cells: Ce3+/Ce4+ and Pd/Pd2+, determine; a) what is the anode and what is the cathode, b) what is Eo, c)what is ?Go and k?
A 35.0 g block of copper at 350.0 degrees celcius is added to a beaker containing 525 g of water at 35.0 degrees celcius. What is the final temperature of water?
A 2.50 mL buffer solution is .250 mol in acetic acid and .250 mol in sodium acetate. (Ka=1.8x10 to the -5). What is the initial pH to the buffer solution
if a 10.0 g sample of zns is treated with excess hcl what volume of hydrogen gas is evolved at stp?zn s 2 hcl aq -gt
An impure sample of sodium chloride weighed 0.6825g. When dissolved in water and reacted with excess silver nitrate, AgNO3, 0.9855g of AgCl precipitated. What is the percentage of NaCl in the impure sample.
Dissolving NH4Cl(s) in water is endothermic with a heat of the solution of 15.2 kJ/mol. If a 6.134 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 24.5°C, what is the minimum temperature reached by the solution
calculate the heat of enthalpy for the reactionpcl5g rarr pcl3g cl2guse the information below.p4s 6cl2g rarr 4pcl3g
In a laboratory, you determine that the density of a certain solid is 5.23\times10^{-6}\;\rm kg/mm^3. Convert this density into kilograms per cubic meters.
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