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suppose a runner completes a 10k road race in 42 minutes and 21 seconds. what is the runners speed in miles per hour
Give the structures of a hydrocarbon that has six carbon atoms and a) three vinylic hydrogens and two allylic hydrogens b) three vinylic hydrogens and no allylic hydrogens
N2 + 3H2 -> 2NH3 . 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield?
The stratospheric ozone layer helps to protect us from harmful ultraviolet radiation. It does so by absorbing ultraviolet light and falling apart into an molecule and an oxygen atom, a process known as photodissociation.
Sugar (82.00 grams; molar mass 342.3 g/mol) was dissolved in water. The freezing point of the solution was determined to be -3.60 deg C. How many grams of water were used to make the solution?
What is the volume of the water displaced? (State the correct number of significant digits.) What is the uncertainty in this value?
Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and 0.0360 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate. What percentage of the Ca2 (aq) can be separated from the Ag (aq) by s..
Compute the partial pressure of Ar(g) that is needed to achieve this. You may assume that delta(vap)H for water is independent of temperature and pressure
Silver chloride, often used in silver plating, contains 75.27% Ag. Calculate the mass of silver chloride required to plate 225 mg of pure silver.
All numerical answers must be reported to the correct number of significant figures. What volume of 1.000 M LiCl must be diluted with water to prepare 250.0 mL of 0.100 M LiCl
A 6.9L balloon is filled with He at 1.00 bar pressure at 298k. How many He atoms are in the balloon?
When 1.00 g of Boron is burned in O2 (g) to form B2O3 (s), enough heat is generated to raise the temp of 733 g of water from 18.0 deg C to 38.0 deg C. Calculate the hear of formation of B2O3(s) under these condtions.
What volumes of CO2 and NH3 at 201 atm and 450.°C are needed to produce 2.54 kg of urea, assuming the reaction goes to completion?
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