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Suppose that .88 g of water condenses on a 75.0 g block of ironthat is initially at 22C. If the heat released during condensation goes only to warming the iron block, what is the final temperature(
How do you write a balanced equation, predicting and identifying possible products of potassium phosphate and magnesium nitrate?
An 8.5 g ice cube is placed into 255 g of water. Calculate the temperature change in the water upon the complete melting of the ice. Assume that all of the energy required to melt the ice comes from
A student suspected that an unknown was undergoing a chemical change at its melting point. Suggest a simple method for testingthe hypothesis.Why does a soluble impurity reduce the melting-point rang
What fundamental thermodynamic variable is directly related to the voltage measured in electrochemical cells? Discuss in detail.
A 240 mL juice sample has 60 mg of absorbic acid, if it takes 30 mL of titrant to oxidize 4.8 mg of absorbic acid, how many mL of juice should be titrated to use 30 mL of titrant?
Write the equilibium expression for the reaction. If Kc was approximately 1 how many chemical species would be found in the solution?
What would be the molarity of a solution obtained when 50 ml of3.00M HCL acid solution is mixed with 70ml of H2O?
Describe what would happend if a hot saturateed solution was filtered by vaccum filtration using Buchner funner at room temperatue.
Suppose you dissolve 50 mg of ascorbic acid (M=176.124g/mol) in water in a 100 mL volmetric flask. then you remove a 10.0 mLa liquot of the solution, put into a beaker, and add 20 mL water and10 mL
Decomposition of dinitrogen pentoxide to nitrogen dioxide and oxygen follows 1st order kinetics and has an activation energy of102 kJ/mol.
A flame test on NaCl produces an intense orange-yellow color. A sodium vapor street lamp (using elemental sodium) produces the same color.
If you suspect a chemical used in the lab might be carcinogenic, what definitive written source of info is availible in the lab to look it up?
Based on the structures of Aspirin and Acetaminophen, why might aspirin be more likely to cause an upset stomach?
6.32 g of potassium chlortae reacts according to the following equation : 2 KClO3 -> a KCl + 3 O2 Determine the quantity of oxygen produced by the reaction as amass and as a volume at a 105 kPa a
The reactivities of phenol and aniline toward bromination change when the reaction is performed in sulfuric acid rather than aceticacid. Explain why?
Write an equation for the Aldol reaction that takes place for the aldehyde. Show the exact structures for aldehyde and product (not general structures with "r" groups)
Calculate the solubility of zinc hydroxide, Zn(OH)2, in 1.00 MNaOH. Ksp = 3.0 x 10^-16 for Zn(OH)2, Kf = 3.0 x 10^15 for Zn(OH)42-
A current of 250. A flows for 24.0 hours at an anode where the reaction occuring is What mass of MnO2 is deposited at this anode?
1.63 g of precipitate is collected from a reaction of a silver nitrate solution with 10.0 mL of hydrochloric acid. Calculate the concentration of a hydrochloric acid solution.
A hydrogen bond between two water molecules is approximately 1/20as strong as a covalent bond between oxygen and hydrogen.
If a sample containing 0.1mg/L of nitrite-nitrogen gives 85 percent transmission when submitted to colorimetric analysis, what percent transmission should a sample containing 0.2 mg/L produce in ana
The stoichiometry of electrolysis: the relationship between amounts of charge and product. What mass of silver (M.W. 107. 9 g/mole) will be formed when 15.0 Aare passed through molten AgCl for 25.0 mi
The value for the standard cell potential of a galvanic cell described by the balanced chemical equation is 0.94 V. Determine the value (V) of the standard reduction potential for theS2O82-/SO42-&nb
Why do the hydrogen and oxygen gas mixtures in the collection bulb not react as soon as they are collected? Note:Consider the role of the match and the properties of gas molecules at room temperatur