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33. A coffee cup calorimeter is used to determine the specific heat of a metallic sample. The calorimeter is filled with 50.0 mL of water at 25.0°C (density of water = 0.997 g/mL). A 36.5 g sample of the metal is taken from a boiling water bath at 100.0°C and placed in the calorimeter. The equilibrium temperature of the water and sample is 32.5°C. The calorimeter constant is 1.87 J/°C. Calculate the specific heat of the metal sample.
a) 0.62 J/g•°Cb) 0.63 J/g•°Cc) 0.66 J/g•°Cd) 0.64 J/g•°C
vaillin used to flavor vanilla ice cream and other foods is the substance whose aroma the human nose detects in the
complete and balance the following redox equation. What is the coefficient of H2O when the equation is balanced using the set of smallest whole-number coefficients
Calculate the pH of the solution, taking into account the activity coefficients for H+ (yH+ = 0.933) and IO3- (yIO3- = 0.928). Assume yHIO3 = 1. (Hint: quadratic)
calculate the concentrations of the protonated and unprotonated forms of bromothymol blue in 100 ml of a ph 8.1 buffer
An automobile engine requires a carburetor or fuel inector to mix the fuel with air. The fuel and air must be mixed in a particlar ratio to achieve maximum efficiency in the combustion of the fuel.
a 32.85-g sample of a solid is placed in a flask. toluene in which the solid is insoluble is added to the flask so that
Calculate the pH of the resulting solution if 22.0 mL of 0.220 M HCl(aq) is added to (a) 32.0 mL of 0.220 M NaOH(aq). (b) 12.0 mL of 0.320 M NaOH(aq).
Discuss what you would observe after elution and visualization of a TLC plate having made the following mistakes in carrying out the analysis. Conceptual Organic chemistry
The atmospheric oxidation of nitrogen monoxide was studied at 183C with initial partial pressure of 1.000 atm of NO and 1.000 atm of O2. At equilibrium, Po2= .50-6 atm. Calculate Kp. 2 NO(g) +02 ->
Sodium hydroxide is known to be hygroscopic and deliquescent: what do these terms mean? How does this property contribute to the hazards associated with handling this substance
What each test reveals about an unknown halide ion? Suggest another test which would confirm that identity. 1.Addition of Cl2 and CH2Cl2 to an aqueous solution of an unknown halide ion led to a dark CH2Cl2 layer.
Determine what volume of .1 M HBr is required to neutralize 50 ml of .140 M Barium hydroxide and determine the normality of a solution consisting of 10.51 mg of NaOH in 591 mL of solution
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