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A 74.6-g ice cube floats in the Arctic Sea. The temperature and pressure of the system and surroundings are at 1 atm and 0 degrees C. Calculate delta S(sys), delta S (surr), and delta S (univ) for the melting of the ice cube. What can you conclude about the nature of the process from the value of delta S (univ)? (The molar heat of fusion of water is 6.01 KJ/mol.)
The precipitate SnO2·4H2O was removed by filtration. The resulting filtrate and washings were diluted to a total volume of 250.0 mL. A 15.00 mL aliquot was buffered and titration of the lead, copper, and zinc required 35.78 mL 0.001500 M EDTA.
For each of the following reactions, calculate the moles of indicated product produced when 3.00 mol of each reactant is used: a) 4Li(s)+O2(g)-->2Li2O(s) (Li2O). b) Fe2O3(s)+3H2(g)-->2Fe(s)+3H2O(l) (Fe). c)Al2S3(s)+6H2O(l)-->2Al(OH)3(aq)+3H2S(g) ..
Phosphate can buffer in three pH ranges. Give the chemical formulas of the buffer pairs and give the range in which each buffers. Start with H3PO4/ H2PO4-1
If 8.0 moles of the gas A is palced in a 60.0 L tank with 1.0 moles of B at 0 degress celsius and 1 atm, they react according to this equation: 2A(g) + B(g) --> 3C(g) +D(g) How many moles are present in the tank when the reaction is complete
If the partial pressure of the cyclopropane in the mixture is 330 mm Hg and the partial pressure of the oxygen is 1.0 atm, what is the total pressure of the mixture in torr
The alcohol (ethyl alcohol/ethanol) content in a bottle of beer is about 5%. The man's weight is 150 lbs and he was drinking over an hour period. State the chemical reaction that took place in the patient's body.
In a solution of NH3, the concentration of NH3 is 0.01 M, Kb is 1.8 x 10-5. What is the concentration of the hydroxide ion
A sample of CO2 gas which weighs 1.62 grams has a volume of 1.02 liters when collected at 20°C. What would be the pressure of the gas sample
Calculate the number of moles of aluminum, sulfur, and oxygen atoms in 8.00 of aluminum sulfate, Express the number of moles of Al, S, O, and atoms numerically, separated by commas.
Ozone, O3 (g), is a form of elemental oxygen that is important in the absorption of ultraviolet radiation in the stratosphere. It decomposes to O2 (g) at room temperature and pressure according to the following reaction
Determine the mass of precipitate (in grams) that forms when 213.8 mL of 0.132 M CaCl2 solution is reacted with excess AgNO3 solution.
strontium-90 and radon-222 both pose serious health risks. sr-90 decay by beta particle production and has a relatively
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