Calculate the average linear velocity (in cm/sec) if tm= 0.9 min for a 25 m x 0.25 mm x 0.2 um Rtx-1 column.

x100 eyepiece graticule 0 10 20 30 40 50 60 70 80 90 100 4070 stage micrometer Apatite crystals were measured using the following objective (100x). The particle sizes of the samples were 5, 7, 9 and 11 respectively. What is the average particle size of the apatite sample?

One of the most important applications of ion exchange is the separation of large molecules from small molecules? 1- true 2- Error

Estimate the Km and vmax from the data.  [S] (M) Velocity (µM/min) 2.5 x 10-6 28 .00001  70 .00004  112 .0001  128 .002  139 .01 140   Km=.00001 vmax=140 Km=.002 vmax=112 Km=.01 vmax=140 Km=.00001 vmax=70

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Ba(NO,l(aq) + K,SOlaq) Baso(s) + 2 KNOlaq) Volume Volume Trial 0.10 M Ba(NO)2 (ml) 0.10 M K,SO, (ml) Mass Baso4 (s) Limiting Reagent 50. 20. 0.46 50. 40. 0.92 3 50. 50. 1.15 4 50. 60. 1.15 50. 80. 1.15 • Question 8 Use the data to identify the limiting reagent for each reaction performed. V Trail 1 a. Neither/Both EV Trial 2 b. Baso4 EV Trial 3 C. KSO4 EV Trial 4 d. Ba(NO3)2 EV Trial 5 e. KNO3 Question Help: Message instructor I Calculator Submit Question • Question 9 Why is the amount of precipitate in the Data Table above the same in Trials 3 through 5? Edit Insert Formats B IVX x' A

Chemistry Fraction no. Elution Vol. (mL) Abs                      (λ = 410)   Fraction no. Elution Vol. (mL) Abs   (λ = 410) 1 (PB pH 6.0) 1 0.0050   11 11 0.0041 2 2 0.0032   12 12 0.0060 3 3 0.0040   13 13 0.0064 4 4 0.0064   14 14 0.0063 5 5 0.0067   15 15 0.1109 6 6 0.0067   16 16 2.8902 7 7 0.0050   17 17 0.8500 8 (PB pH 8.0) 8 0.0049   18 18 0.2019 9 9 0.0052   19 19 0.0378 10 10 0.0050   20 20 0.0073 Use the data above to plot an elution profile, in which the absorbance is on Y-axis, and elution volume (volume = fraction number) is on X-axis. The elution profile must indicate at (1) which point the pH change occurred, (2) the fraction(s) which contain the highest myoglobin content, and (3) the maximum absorbance detected.

SrCl, Observations B|I|U X X + fx | ®| D e Normal Activated charcoal observations Normal BIU fx| 田=| || 的|| || In 1. Based on your understanding of color's relationship to wavelength, identify the approximate wavelength of light (nm) emitted by strontium when it was burned. (No quantitative data was collected for this; you are giving an approximate value only, based on what you observed.) Explain your reasoning in full, making sure to cite specific data and observations to support your answer. Normal BIIIU X:| X'|- EE = fx| DI e 2. While boiling potatoes for dinner in salted water, the pot boils over and you notice that the flame on your gas burner turns to bright yellow-orange. How would you explain the appearance of a color in the previously blue flame? Normal BIIU X X + 田=|IT| 3. What would you conclude about chloride based on your results in the flame tests? Xe | X° | → EI fx| fr DI e E E IT E IT Normal BIIU 4. Place the metal solutions you tested in order of increasing energy…

100% nus (Alt+/) I 21 1 1 DATA AND CALCULATIONS Pressure Volume (kPa) (mL) 5.8 mL 191.30 10.8 103.47 13.3 84.13 15.8 71.52 18.3 62.57 20.8 55.66 PROCESSING THE DATA/CONCLUSION 1. If the volume is doulbled from 5.0 mL to 10.0 mL, w pressure? Slhow the pressure values in your answer.

2. The following values were obtained from the calibration of a 10mL pipet 10.28, 9.99, 10.12, and 9.63 mL. Calculate the mean value and the standard deviation from the mean.