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Jack and Jill exercise in a 25.0-m-long swimming pool. Jack swims nine lengths of the pool in 153.9 seconds (2 minutes and 33.9 seconds), while Jill, the faster swimmer, covers ten lengths in the same time interval. Find the average velocity and average speed of each swimmer.
Which of the following reactions involves neither oxidation nor reduction?explain
solutions of ag plus, cu 2 plus, fe 3plus, and Ti 4 plus are electrolyzed with the constant current until 0.10 mole of metal is deposited. which will require the greatest lenght of time.
Carry out a calculation that would show only Al(OH)3, but not Mg(OH)2, will form precipitate in a solution that contain 0.10 M Al3+ and 0.10 M Mg2+ if the solution is buffered at pH = 9.00.
Draw all of the resonance forms of 4-methoxybenzaldehyde which contribute to the reducwd electrophilicity of the aldehyde carbon relative to benzaldehyde.
Use the following information to find H °f of gaseous HCl: N2(g) + 3H2(g) ? 2NH3(g) ?H°rxn = - 91.8 kJ N2(g) + 4H2(g) + Cl2(g) ? 2NH4Cl(s) ?H°rxn = - 628.8 kJ NH3(g) + HCl(g) ? NH4Cl(s) ?H°rxn = - 176.2 kJ
A college student produces about 100 kcal of heat per hour on the average. What is the rate of energy production in watts? How many kilocalories of heat does the operation of a 1200-W hair dryer produce each second?
A reaction with a low enthalpy of reaction value is not spontaneous at low temperature but becomes spontaneous at high temperature.
How do geologists determine the age of a fault line? What types of evidence specifically are used?
Suppose you had a beaker containing nitric acid, and you poured it into a beaker containing a solution of cesium hydroxide. Which type of chemical reaction could you expect to observe?
There is a satellite moving at constant speed in a circular orbit around the Earth. What kind of work (Force*Displacement) does the Earth do on the satellite?
Show how to synthesize 2-methyl-2-pentene from an alkyl halide and an aldehyde or ketone, plus any other necessary reagents.
A 1-L flask is filled with 1.30 g of argon at 25 degrees Celsius. A sample of ethane vapor is added to the same flask until the total pressure is 1.05 atm. What is the partial pressure of argon in the flask?
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