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The half life for the decay of radium is 1620 years. What is the rate constant for this first-order process?
a. 4.28 x 10 to the -4 yr to the -1b. 1.12 x 10 to the -4 yr to the -1c. 2.33 x 10 to the -4 yr to the -1d. 8.91 x 10 to the -4 yr to the -1e. 6.17 x 10 to the -4 yr to the -1
Calculate the volume occupied by 1.00 mol N2 using the van der Waals equation in the form of a virial expansion at its Boyle temperature. Assume that the pressure is 10 atm throughout.
Sulfur dioxide gas is oxidized in 50 percent excess air with 70 percent conversion to sulfur trioxide. The gases enter the reactor at 350 oC and leave at 450 oC.
Calculate the final temperature when a 29.0 gram sample of ice at 0oC is placed into a styrofoam cup containing 115 grams of water at 75.7 oC. Assume that there is no loss or gain of heat from the surroundings.
A 35.0 g sample of a nonelectrolyte was dissolved is 680. g of water. The solution's freezing point was -2.80°C. What is the molar mass of the compound?
Calculate the composition of air (percent by mass) assuming that it only contains nitrogen and oxygen and behaves like an ideal gas
What is the molarity of the resulting solution when 24.485 g of Mn(ClO4)2 · 6 H2O are added to 350.0 mL of water? I took 24.485g and divided it by 361.932 to get moles
Total pressure in kPa 10 seconds after initiation of the reaction if initially there was 88.3kPa of pure N 2 O 5 vapor Enter the total pressure in kPa 10 minutes after initiation of the reaction.
use the appropriate standard reduction potentials to calculate the value of k at 25 degrees celcius for this reaction
water can react with an acid or a base to produce two different products. draw the structure of each and label products
what is the analytical molarity of fecl3 in a solution prepared by dissolving 1.340 g of fecl3 in water and diluting to
Buffering capacity You want a solution that will buffer the addition of either 10 micromoles of acid or 10 micromoles of base. Total buffer concentration is equal to the concentration of the acid plus the concentration of salt of the acid
A weather balloon has a volume of 750 L when filled with helium at 8 oC at a pressure of 380 torr. What is the new volume of the balloon when the pressure is 0.20 atm and the temperature is -45 oC?
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