39. Which unknown acid has a concentration of 0.15 M? (A) HCIO₂ (B) HF (C) HI 10. Which base is weakest? (A) C6H5NH2 (Kb = 3.9×10-10) (B) CsHsN (Kb = 1.7×10⁹) (C) CO3²- (Kb = 1.8×10 ) (D) C₂H5NH2 (Kb = 5.6×10) (A) 2.3x10-¹1 (C) 7.00 . What is the pK, of CH3NH3? The K, of CH3NH2 is 4.4×104. (D) H₂SO3 (B) 3.36 (D) 10.64

Question: The following data measures how quickly He(g) diffuses in gas chromatograph detector as function of temperature. Temperature (K) Time of diffusion of He(g) (ms) 200 300 400 500 600 700 800 9.72 7.93 6.87 6.15 5.61 5.19 4.86 Which of the following functions of temperature will give straight line when plotted vs. time? Circle your answer. (a) Temperature vs. time (b) Ln(temperature) vs. time, (c) √Temperature vs. time, 1 (d) vs. time, Temperature

C4H8D ------------… 7 ... 6 Problem 7 ...... 2 ...... 4 ppm, 8 ... 3 ---- 3 3 ...… -------

Use the References to access important values if needed for this question. You have the following data points which belong to a function of the form y = ae", where b can be positive or negative. 4.13 3.26 2.57 0.100 0.200 0.300 You wish to determine the value of the constant, 6, and to do so you will construct a linear plot. What will you plot against what? y-axis label: Iny - x-axis label: x From the values of a and y in the table above, calculate the values of the three corresponding data points. Click on the graph below, and use the "Freeform Curves" tool to plot the data. Line segments will automatically connect the points. Enter Solution What is the numerical value of the constant, b? b = Submit Answer Retry Entire Group No more group attempts remain

What purpose does the Artist wheel serve in chemistry?|

Chemistry Compute 1240.64/12.5. Round the answer appropriately. Express your answer numerically using the proper number of significant figures.

CUTICLE OIL O Microsoft W final E.A 1. G fahrenheit x 9 Learning M X O Schoology x O ch 9 key A mukilteo.schoology.com/common-assessment-delivery/start/4592487484?action on.. Bb Molar Mie O Periodic x 3-6, 6-5, & 6-6 Test 6 of 10 © 29 POSSIBLE POINTS: 2 What is the mass of a 5.521 mole sample of MgCl2? O 17.26 g O 100.7 g O 525.7 g O 256.1 g 4. 6 8 9 10 Lenovo DI 23 $ 7 4 t r e ーの づ

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Categorize each as a determinate or an indeterminate error and further classify determinate errors as instrumental, method or personal.d) The tip of the pipet used in the analysis is broken. e) In measuring the same peak heights of a chromatogram, two technician each report different heights.

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