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1. Use the regression equation below to answer the following questions. Be sure to explain the reasoning behind your answers. log Q demanded for widgets = -4.00 - 1.30 log Pwidgets + 1.19 log Income - 0.14 log P Gidgets + e t-Values (-2.56) (2.34) (-1.14) Adjusted R 2 = 0.95, F Value = 10.20, Sample =1980-2011. a. Explain whether or not each coefficient is significantly different from zero. b. What percentage of the variation in log Q demanded for widgets is accounted for by the model? c. Are widgets and gidgets complements or substitutes? Can you be confident of that conclusion? Why or why not.
What is the density (in grams per liter) of a gas mixture that contains 26.0 % F_2 and 74.0 % He by volume at 743 mm Hg and 28.5 C?
Determine what is the exact volume of the 250-mL Erlenmeyer flask express your answer (in mL)?
At 2000 degrees celcius the equiblibrium constant for the reaction 2NO to N2 and O2 is Kc = 2.4 x 103. If the initial concentration of NO is 0.200M, what are the equilibrium concentrations of NO, N2, and O?x?
Consider the gas phase reaction: 2SO2(g) + O2 (g) 2 SO3 (g). delta H°=-198 kJ/mol. a) How would you change temperature, pressure, and volume of the container to maximize production of SO3. Increase, decrease, or expect no effect
If 36.6 grams of hydrogen sulfide gas (H2S; MM = 34.08 g/mol) react with 35.6 grams of oxygen gas (O2, MM = 32.00 g/mol), what is the mass of sulfur dioxide (SO2, MM = 64.06 g/mol) gas produced
what is the volume of 1 mole of Helium gas when the pressure is 1.47 atm and the temperature is 287 K.
A student added a total of 15.00 mL of 0.5241 M HCl to 1.4881 g to of an unknown which contained CaCO3 (molar mass = 100.09 g/mol). The resulting solution required 12.21 mL of 0.1211 M NaOH to back titrate the excess HCl. What was the percent CaCO..
Two weak acids, HA (pKa=3.0) and HB (pKa=5.0) have equal partition coefficients for extraction from water to n-octanol. an aqueous solution with equal concentrations of HA and HB is extracted with n-octanol
The heat of formation of KCl(s) is -436.7 kJ/mol and the heat of formation of KCl(aq, 1 m) is -419.5 kJ/mol. Determine the heat of solution of KCl.
How many mL of medicine X would you need to give a 100 g dose?
What is the percent hydrogen (H) by weight of a solution containing 53.5mL of CH3COCH3? The density of acetone is 0.788 g/mL.
What is the reason for using a phase transfer catalyst? a)It is used to transfer the catalyst to the active site of the reaction b)It serves as a proton transfer agent which moves protons from a base to an acid c)It is a small molecule which attac..
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