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How many grams of urea must be added to 88 milliliters of water in order to obtain a solution with a mole fraction of 0.012 in urea?
Explain how the sponge nucleoside cytosine arabinoside and fungal nucleoside cordycepin combat cancer (give their structures as well).
The activation energy of a certain reaction is 52.9 kJ/mol. How many times faster will the reaction occur at 35 degrees C than at 25 degrees C
A particular compound has a heat of vaporization of 28600 J/mol. At 281 K it has a vapor pressure of 121 mmHg. What is its vapor pressure at 306 K
An expanding gas does 175.0 J of work on its surroundings at a constant pressure of 1.0 atm. If the gas initially occupied 68.0 mL, what is the final volume of the gas
Calculate the cell potential for the following reaction as written at 73C, given that [Cr2+]=.885M and [Fe2+]=.0100M.
you are holding 2 balloons, an orange balloon and a blue balloon. the orange balloon is filled with neon gas and the blue one is filled with argon gas. The orange balloon has twice the volume of the blue ballon. What is the mass ratio of Ne:Ar in ..
he precipitate was filtered, dried and found to weigh 1.074 g. What is the percentage by mass of barium in the ore. Assume all of the barium is precipitated as BaSO4.
A 16.4-L sample of gas at STP is heated to 55°C at 605 torr. What is the new volume?
What is the barium ion concentration in a saturated barium fluoride solution made by adding solid BaF2 until no more dissolved
Dehydration of 2-methylcyclohexanol gives small amounts of 1-ethyl-cyclopentene. Write a mechanism to account for this product.
Ammonia gas at 223°C and 90. atm flows into a reactor at a rate of 550. L/min. Carbon dioxide at 223°C and 47 atm flows into the reactor at a rate of 600. L/min. What mass of urea is produced per minute by this reaction assuming 100% yield?
the evaporation of water is endothermic as indicated by the followingh2olh2ogheat44.01what minimum mass of water has to
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