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Problem- Methanol is toxic because it is metabolized in a two-stop process in vivo to formic acid (HCOOH). Consider the following overall reaction under standard conditions: O2(g) + CH3OH(l) -> HCOOH(l) + H2O(l) +1019.6 kJ
a. Is this reaction endothermic or exothermic?
b. What is the value of Hrxn for this reacton?
c. How much heat would be absorbed or released if 60.0 g of methanol were metabolized in this reaction?
Provide your answer in scientific notation
For a normal-shaped distribution with μ = 50 and σ = 8: a. What proportion of the scores has values between 46 and 54?
For a particular redox reaction ClO2- is oxidized to ClO4- and Fe 3+ is reduced to Fe 2+ . Complete and balance the equation for this reaction in basic solution. Phases are optional.
Dana Davenport donates eight hours of her time on a Saturday to help out a qualified charity. What is her charitable contribution deduction?
A simple random sample of 40 salaries of NCAA football coaches has a mean of $415,953 and a standard deviation of $463,364. Construct a 95% confidence interval estimate of the mean salary of an NCAA football coach.
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The pH of 0.05 M benzoic acid is 2.24. Calculate the change in pH when 2.45 g of C6H5COONa is added to 20 mL of 0.50 M benzoic acid, C6H5COOH. Ignore any changes in volume. The Ka value for C6H5COOH is 6.5 x 10-5.
What is the sign of the entropy change for the heat transfer. You probably know that when two objects at different temperatures are brought into contact, heat always travels from the hotter object to the colder object; never the reverse.
a student placed 14.5 of glucose in a volumetric flask added enough water to dissolve the glucose by swirling then
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A nurse desires to prepare a 1.0% (m/v) solution of silver nitrate from 32mL of a 4.0% (m/v) stock solution. Explain how much water should be added to the 32mL stock solution
Calculate the pH of a solution that is .210M in nitrous acid and .290M in potassium nitrite. The acid dissociation constant of nitrous is 4.50X10^-4.
At a certain temperature, the equilibrium constant for the following chemical equation is 3.90. At this temperature, calculate the number of moles of NO2(g) that must be added to 2.31 mol of SO2(g) in order to form 1.10 mol of SO3(g) at equilibriu..
Problem- Explain the difference between UV/Vis and Fluorescence spectrophotometry. a) Which has greater sensitivity? b) Draw 2 block diagrams to illustrate the differences
a sulfuric acid solution containing 571.6 g of h2so4 per liter of solution has a density of 1.329 ggtcm3. calculate a
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Ozone is an air pollutant produced when nitrogen dioxide, NO2 , from automobile exhaust reactswith oxygen. The chemical equation for this reaction is NO2(g) + o2(g) ---> NO(g) + O3(g).
estimate the value of the equilibrium constant at 650 rm k for each of the following reactions. delta hcircrm f and
To get hold of 8.0g of potassium dichromate from a solution labeled 5.0% by mass, explain how many grams of solution are needed
The specific heat of liquid water is 4.184 J/g. degree C. Calculate the energy required to heat 10.0 g of water from 26.5 degree C to 83.7 degree C.
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