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Diethyl ether, used as a solvent for extraction of organic compounds from aqueous solutions, has a high vapor pressure which makes it a potential fire hazard in laboratories in which it is used. How much energy is released when 100.0 g is cooled from 53.0°C to 10.0°C?
boiling point34.5°C
heat of vaporization351 J/g
specific heat capacity, (CH3)2O(l)3.74 J/(g·K)
specific heat capacity, (CH3)2O(g)2.35 J/(g·K)
Sketch the wave functions and probability functions for the particle in a box for the n=1, n=4, n=9, and n=900. According to the Correspondence principle, what does this imply
How many moles of Cr(OH)3 will dissolve in 1.00 L of a solution with a pH of 4.85. (Assume the pH does not change as the Cr(OH)3 is placed in the water.) (Ksp for Cr(OH)3 is 6.7 x 10-31)
given the following two solutions 0.200 m hc2h3o2aq with pka 4.76 0.200m naohaq a mixture is made using 50.0 ml of the
A 182-g sample of gold at some temperature is added to 22.1 g of water. The intitial water temperature is 25.0 degrees C, and the final temperature is 27.5 degrees C. If the specific heat capacity of gold is 0.128J/g*K what was the initial tempera..
A mixture of gases is prepared for laboratory experiments by combining 5.0 L of oxygen, 0.68 L of nitrogen, and 0.34 L of carbon dioxide. Determine the percentage of nitrogen in the mixture
The following four numbers are estimates of the mass of an object: 5.20 g, 5.66 g, 6.10 g, and 5.35 g. What is the standard deviation to 2 significant figures
what simple test would you use to identify the possible presence of HCl (aq)? what result do you expect if the solution is HCl (aq)?
A student prepared a saturated solution of copper (II) tartrate by cooling it to 10 degrees C. While the solution was still cool, the concentration of copper (II) was determined. How would the value of the solubility product (Ksp) be affected? Exp..
Justify the Born-Oppenheimer approximation based on vibrational frequencies and the timescale for electron motion.
What is the osmotic pressure of a solution prepared by dissolving 4.00 g of CaCl2 in enough water to make 540. mL of solution at 28.5°C?
Which of the two. Cloud droplets or raindrops are expected to be more effective in scavenging gases from the atmosphere. Explain your reasoning
At 2000°C, 5.0×10-3 mol CO2 is introduced into a 1.0 L container and the following reaction comes to equilibrium:2CO2(g) 2CO(g) + O2(g) Kc = 6.4×10-7
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