A mixture of styrene and ethylbenzene are analyzed by MALDI-TOF-MS. Styrene, CgHg*, has a flight time of 8.694 x 107 sec. What is the TOF of ethylbenzene? Styrene has a molecular mass of 104.15 g/mol. Ethylbenzene has a molecular mass of 106.167 g/mol. Please show results of intermediate answers in your calculations for partial credit (you may type or insert images of legible handwritten notes).

After finishing the lab, Peter successfully identified his unknown was acetone (molar mass: 58.1 g/mol).  He then realized that he had forgotten to write down the temperature on his data sheet because he and has partner had done the math together.  Peter unfortunately doesn't know his lab mates phone number or last name, so he can't look him up on social media.  Poor Peter - he only has 30 minutes to turn in his lab report.   Based on the data he collected below - what was the temperature of his water bath?   Peter remembers that his water bath never boiled, but his acetone did fully evaporate. Mass of flask: 77.002 g Mass of flask + unknown condensed liquid: 77.487 g Temperature of water bath: ???? Pressure of gas in our system: 0.997 atm Volume of gas in our system: 250 mL   Group of answer choices: A) 85 °C B) 100 °C C) 91 °C D) 97 °C

I Review I Constants I Periodic Table MISSED THIS? Read Section 15.2 (Page) ; Watch KCV 15.2, IWE 15.1. Consider the reaction Part A Cl2 (g) + 3F2(g) → 2CIF3 (g), A[Cl2]/At = -0.054 M/s. Determine A[F2]/At. Express your answer to two significant figures and include the appropriate units. • View Available Hint(s) HÅ A[F2]/At = Value Units Submit Part B Determine A[CIF3]/At. Express your answer to two significant figures and include the appropriate units. • View Available Hint(s) HẢ ? A[CIF3]/At = Value Units Submit P Pearson Copyright © 2021 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us |

Which of the following variables are directly related? (more than one answer can be chosen) P& V P &T III V&T O A. II O B. II O C. I

Hi I need help finding the rate of disappearance and rate of appearance of NO2 for time's 200 and 300 seconds. I have pasted a screenschot of my excel data table, I just need help figuring out how to get the rate of dissapearance and appearance for NO2. Thank you so much. 1 2 3 890626695 10 11 12 13 14 15 16 17 18 19 A B C D 0 0.0062 0.0116 0.016 0.0198 0.0228 0.0256 0.0278 E F G [NO₂] Times (s) [N205] (A In[N205] 1/[N205] Rate of Di Rate of Appear 0 0.02 -3.91202 00050 100 0.0169 -4.08044 0.0142 -4.25451 200 300 400 500 H 00059 00070 0.012 -4.42285 00083 0.0101 -4.59522 00099 0.0086 -4.75599 00116 600 0.0072 -4.93367 00139 700 0.0061 -5.09947 00164 K

What trend do you notice regarding the effect of temperature on the Haber process? Sup- port your answer using data from the graph. Answer using 2 to 3 complete sentences.

Quinine is the bitter-tasting compound in tonic water. Quinine is also used to prevent malaria. The chemical formula of quinine is C20H24N2O2. If you burn a 0.895 g sample of quinine in excess oxygen, how many grams of carbon dioxide would you obtain?

MDL WEEK 3 ACTIVITY 3 UAM: VERTICAL DIMENSION/FREE-FALL ANSWER IN 1 WHOLE SHEET OF PAPER SOLVING PROBLEM: Illustrate the set-up or scenario and write the GUESS. (10points) 1. Apollo was challenged to dive from a bridge, starting from the rest, he jumped off the bridge that is 2.0 meters above the water. a. How long would it take Apollo to reach the water? b. How fast must be his velocity right before he would have touched the water? Set-up/Drawing: GIVEN: UNKNOWN: TIME AND FINAL VELOCITY EQUATIONS: A. t = 2d/g B. V₁ = Vi+gt SUBSTITUTION: SOLUTION: 2. A brick falls freely from a high scaffold and hits the ground after 5.5 seconds. How high is the scaffold? What is the velocity of the brick just before hitting the ground? SET-UP/DRAWING: GIVEN: EQUATIONS: /SUBSTITUTION/SOLUTION A. d= Vit+2 gt2 B. V₁ = Vi +gt UNKNOWN: "Be strong and courageous. Do not be afraid or discouraged for the LORD our God will be with us wherever we go". Joshua 1:9

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