
(3 pts) What is the molecular weight of ibuprofen, C13H1802? (Show your work!)
Determine a reasonable molecular formula for a compound with a molecular weight of 113. Show your work. b. Report the degrees of unsaturation for your formula.
10) Solve the following A,B and C: Note: Show all work A. Determine the molecular weight (experimental) of sucrose. B. Calculate the molecular weight (accepted) of sucrose (C12H22O11). C. Calculate the percentage of error between your experimental and accepted values.
Question 150 pts [SHOW YOUR WORK, 6 pts.] What is the energy (in kJ) of 1 mole of photons with the wavelength of 450. nm? Question 160 pts [SHOW YOUR WORK, 10 pts.] What wavelength of light (in nm) is emitted when a Be3+ ion relaxes from n=8 to n=2?
**Show all work and label answers for full credit. Box in your final answers." 1. When a person takes an ibuprofen pill, the amount of ibuprofen (in milligrams) in the person's bloodstream can be modeled by the function P(t) = 400(0.71)' where t represents the time in hours after the pill is taken. a. How much ibuprofen is taken initially? (2 pts.) 400 b. According to this model, is the amount of ibuprofen increasing or decreasing over time? (2 pts.)...
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What was the work done by the suspended weight when the car (a) moved up the incline and (b) moved down the inclinc? (Show your calculations.) 2. What was the work done by gravity acting on the car when it (a) moved up the incline and (h) moved down the incline? (Show your calculations.) 3. (a) For the car going up the incline. what percentage of the work done by the suspended weight was...
750 mt 2. Calculate the molecular weight of Freon-12, if 122.70 liters of its vapor at 200.00 C and 790.00 mm Hg has a mass of 397.00 g. Show your work. 3. Suppose a student performs this experiment and obtains a molecular weight of 70 g/mol for isopropyl alcohol. Give valid sources of error for what could have caused the molecular weight to be higher than expected. 4. Suppose a student performs this experiment and obtains a molecular weight of...
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Question 9 (13 points) In a test of weight loss programs, 40 adults used the Atkins weight loss program. After 12 months, their mean weight loss was found to be 2.1 lb, with a standard deviation of 4.8 lb. Answer the questions to construct and interpret a 90% confidence interval for the true mean weight loss for all adults who used the Atkins weight loss program. a. (1 pt.) What parameter are you estimating? (p or...
1. Covert the following, showing all work: a. How many moles of ibuprofen, C13H18O2, are in a 200 mg tablet that is 100% ibuprofen? b. A 5.00 g sample of NaOH is dissolved in 750 mL of solution. What is the concentration of Na+ ions in solution? 2. Nicotine contains 74.02% carbon, 8.710% hydrogen, and 17.27% nitrogen. It has a molar mass of 162.28 g/mol, what is the empirical formula and molecular formula for nicotine?
1.2 pts.) Complete the following (assume that mass and weight are equivalents), a) The weight of your alcohol that you started with = 1. 9 b) The molecular weight of your alcohol = 102.17 gimo ne number of moles of your alcohol in your sample that you used to start the reaction = 0.01297 more d) The number of molecules of your alcohol in your sample that you used to start the reaction = (6.023 x 10 molecules 0.01297 moles)...
L 2. (15 pts) What is the general solution of x' = Ax, where A = show your work.
L 2. (15 pts) What is the general solution of x' = Ax, where A = show your work.