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A solution containing 16.9 g of nonvolatile molecular compound in 250. g of water has a freezing point of -0.744°C. What is the molar mass of the substance?
Calculate the root mean square speed of (a) Xe atoms and (b) He atoms at 298K. What si the root mean square of each of these at 500K?
50.0 mL of 0.10 M HNO2 (Ka=4.5E-4) is added to 25.0 mL of 0.25 M KNO2 solution. What is the pH of the final solution
A 1.00 L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate the pH of the solution after the addition of 100.0 mL of 1.00 M HCl. The Ka for HF is 3.5E-4
Calculate the energy in joules and calories lost when 10.0 gm ethanol, {C_2H_5OH}, cools from 62.5 0C to -46.0 0C?
dinitrogen pentoxide n2o5 decomposes in the gas phase to form nitrogen dioxide no2 and oxygen gas o2. the reaction is
The following reaction is spontaneous only below 3000 K. What conclusions can be drawn regarding this reaction? A + B ® AB
Consider the titration of 50.0 mL of 0.200 M HOCl by 0.200 M KOH for the next five questions (Ka for HOCl = 3.5 x 10-8). Calculate all pH values to two decimal places.
What is the percent yield of lithium nitride if 76.8 g of lithium nitride is recovered from reacting 56.0 g of nitrogen gas with 56.90 g of lithium metal?
A reaction has a rate constant of 0.0591 sec-1, how much of the compound (in mol/L) is left after 5.03 sec, if there was 0.770 mol/L at the start
determine the throat diameter of a Venturi meter which would measure a flow of 0.4 m3/s in a pipe of 0.6m diameter with a differential head of 0.8
11 g of sodium bromide NaBr is mixed with 9 g of butanol CH3CH2CH2CH2OH to yield 258 mg of bromobutane CH3CH2CH2CH2Br. Under the catalysis of 10 ml of sulfuric acid density 1.84g/ml.
Consider the following function. f(x) = x^3 ln x b) Use l'Hospital's Rule to determine the limit as x ? 0+, c) Use calculus to find the minimum value., d) Find the interval where the function is concave up.
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