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What would be the vapor pressure of a mixture of methanol-ethanol given the vapor pressure of pure methanol as 92 mm Hg and of pure ethanol as 45 mm Hg at 20°C? Assume ideal solution.

Consider the volatile organic solvent benzene (C6H6) with a boiling point of about 80°C. Why is this not surprising compared to water ? Explain (max of two to three sentences). 

The specific heat of water is 4.18 J/g C. Would the specific heat of air expected be higher or lower than this?

During an assignment, you feel emotionally triggered by the content. Which demand applies?

If you have 2.0 g of iron (specific heat for iron is 0.450 J/g oC) and 2.0 g gold (specific heat for gold is 0.128 J/goC). Which of the two metals would have a higher temperature when heated on the same hot plate at the same length of time? Explain briefly your answer.  

Calculate the mole fraction of water in a solution containing 15.40 g sucrose in 250.0 g water. Molar masses: water (18.02 g/mole) and sucrose (342.3 g/mole) Show your solution in the scratch paper. No solution no points!  

Please click on the link below to access the practice. Once you open the quiz, please complete the quiz on paper showing all of your work. Put question 1 on one side of the paper and question 2 on the other side of the paper. Once you are finished with the quiz you will have 10 minutes to upload your work to Moodle. Please make sure that you take a good picture of both pages and upload the pdf (1 document, 2 pages) to Moodle. @@PLUGINFILE@@/Practice%20Test.pdf?time=1760466473591

The data set below represents the number of burgers eaten per year by a Texan citizen. 40  ,  32  ,  20  ,  51  ,  15  ,  29  ,  33  ,  49  ,  19  ,  37  ,  20  ,  10  ,  0  ,  5  ,  105  ,  84  ,  23 Find the five number summary.  Round to the nearest tenth, if necessary.  (8 points)  Min = ______  ,  Q1 = _______  ,  Median = _______  ,  Q3 = ________  ,  Max = _______ List all outliers in this data set, if one or more exist.  Explain why the data value(s) is/are an outlier.  (2 points)

Fill in the blank word bank: mean, parameter, population, sample, standard deviation, statistic, survey.

Complete the table below.  Round to the nearest hundredth, if necessary.  (2 decimal places) Class Limits Class Boundaries Frequency Midpoint Relative Frequency Cumulative Frequency 2 – 14 – 4       15 – 27 – 7       28 – 40 – 17       41 – 53 – 12       54 – 66 – 9       X X ∑ f =  X X X (10 points) Note: Find lower and upper class boundaries, midpoint of each class, rel. f, and cumulative f.  Do not fill in the boxes with “X” in them. Based on the table above, sketch the frequency histogram (***5 points***) with the frequency of each class labeled on the vertical axis and the midpoint of each class labeled on the horizontal axis.