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За. Bromine and methanoic acid react in aqueous solution. Br, (aq) + HCO0Н (ад) — 2Br (aq) + 2H" (аq) + Со, (g) The reaction was monitored by measuring the volume of carbon dioxide produced as time progressed. o 5 10 15 20 25 [Source: © International Baccalaureate Organization 2019] 30 20 40 60 80 100 120 140 160 Time / s [Source: © International Baccalaureate Organization 2019] Determine from the graph the rate of reaction at 20 s, in cm³ s1, showing your working. 3b. Outline, with a reason, another property that could be monitored to measure the rate of this reaction. 3c. Describe one systematic error associated with the use of the gas syringe, and how the error affects the calculated rate. 3d. Identify one error associated with the use of an accurate stopwatch. Volume of carbon dioxide / cm T m mm mo

Answer question 21 and 22 short answers

30- 25 22.285 20 atm 15. 10- 50 100 150 200 250 300 seconds created x10 Is BF, being created or destroyed by the chemical 3 destroyed reaction? neither created nor destroyed is being created or destroyed, what is the rate at If BF3 which it is being created or destroyed 80 seconds after the reaction starts? Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol. If BF, is being created or destroyed, what is the 3 average rate at which it is being created or destroyed during the first 80 seconds of the reaction? Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol.

All changes saved 17 Allyson and Cami add 25 mL of 3 M hydrochloric acid (HCI) to beakers containing 0 mL, 25 mL, 50 mL, and 75 mL of distilled water. The students then drop 5 cm of Magnesium (Mg) ribbon into each beaker and measure the time for the magnesium to completely react with the acid. The results are shown in the data table. W Y. 125 mL 125 mL 125 mL 125 mL 100 mL 100 mL 100 mL 100 mE 75 mL 75 mL 75-mE 75 mL 50 mL 50-mL 50 mL 50 mL 25-mL 25 mL 25 mL 25 mL Magnesium and HCI Reaction HCI Water Time Beaker (mL) (mL) (s) W 25 8. 25 25 16 25 50 23 Y 25 75 33 17 of 25 NEXT SAVE&EXIT PREVIOUS Which statement BEST explains the change in reaction time as the amount of water increases? US 7:18 Lit & 8.

Part A Consider the equation for the decomposition of SO2 Cl2, SO2Cl2 (g) → SO2 (g) + Cl2 (g) Use the graph and the best fitting line to predict the concentration of SO2 Cl2 at 1700 s. The graph of In SO2 Cl2] versus time is Express your answer to two significant figures and include the appropriate units. -2.3 Slope y-intercept HẢ ? -2.4 y = -0.000290t - 2.30 -2.5 Value Units -2.6- -2.7 Submit Request Answer -2.8+ 500 1000 1500 2000 Time (s) Provide Feedback In [SO,Cl2]

100% Correct A typical person has an average heart rate of 69.0 beats/min. Calculate the given questions. How many beats does she have in 7.0 years? How many beats in 7.00 years? And finally, how many beats in 7.000 years? Pay close attention to significant figures in this question. 47.5% In Progress 100% 7.0 years: beats Correct 60% beats In Progress 7.00 years: 0% beats 7.000 years: 100% Correct Question Credit: OpenStax College Physics 97.5% Correct 100% Correct on 100% Correct

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Consider the following reaction: H2(g) + Cl2(g) 2 2 HCI(g) AH = -184.6 kJ The following graph represents a stress imposed on the system after equilibrium is initially established. HCL Cl2 He 60 50 40 30 20 10 + + 10 20 30 40 Concentration (mol/L)

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Name (please print): Fall 2022 Basic Laboratory Operations Post Lab Questions 1.) Suppose you're attempting to measure the density of a liquid that is highly volatile (it evaporates quickly). If you first measure the mass and then several minutes later you measure the volume of the liquid will the measured density be higher than the true value, lower than the true value, or the true density of the liquid. [It helps to understand this problem with the density equation.] 2.) Suppose you're attempting to measure the density of a liquid that is highly volatile (it evaporates quickly). If you first measure the volume and then several minutes later you measure the mass of the liquid will the measured density be higher than the true value, lower than the true value, or the true density of the liquid. [It helps to understand this problem with the density equation.] 3.) You're attempting to calculate the density of an alloy. The alloy is in the shape of a cylinder. If the mass of the alloy is…

Which energy levels precede and succeed 4s ?

For A⟶products, time and concentration data were collected and plotted as shown. [?] (?) t (s) 0.6000.600 00.000.0 0.4840.484 30.030.0 0.4050.405 60.060.0 0.3490.349 90.090.0 order =    k =    units =

"71 36 K/s ill.l O 10:01 يستخدم التطبيق المیکروفون Me et من 6 / What are the goals of adding vinegar to milk 2/ What are the results of adding vinegar to milk 3 / What is the benefit of adding vinegar to milk 10:01 زهراء 21.03.17 الساعة ص 10:01

4PH3 P4 + 6H₂ What is the rate of disappearance of PH3 from 0 to 75 seconds? Time [PH₂] [P4] [H₂] 0 2.00 0 0 75 1.50 ? ? 150 1.25 0.19 1.13 225 1.13 0.22 1.31 300 1.07 0.23 1.40 RatepH3 [?] x 10 M/s Coefficient (green) Exponent (yellow) Enter

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The Ksp of Fe(OH)3(s) is 3  ×10-39.  What concentration of Fe3+ can exist in pure water? A. 3  ×10-4 M B. 1 ×10-10 M C. 3  ×10-21 M D. 3  × 10-24 M E. 3  × 10-30 M

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For this question: How SPF blocks UV Rays from the sun Please try to answer it in a presentation way (provide slides & pictures) & please write in detail each slide and explain them Provides notes to write on index cards please DON'T FOGET: first slide should outline (summarize) the whole presentation and the last slide should have the bibliography please please try to answer everything as fast as possible please its super super important and urgent i really need it Please please please answer I really need you to answer this please I'm begging Just try your best to answer please

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very strong back drugs on the tumor sizes of mice. The doctor is searching for the correct combination of medications that will make the tumor shrink in size. The drugs he has at his disposal are drugs / B and C. His experiments are summarized below. Average rate of Exp. [A), in [B], in [C], in shrinkage M M M # |(mm/week) 0.0010 0.0020 0.0030 0.010 II 0.0010 0.0010 0.0020 0.0050 0.0030 0.0020 0.0015 0.090 0.0030 0.0020 0.0030 0.090 II IV What is the rate law for this system? %23