PHY 140 Lab6

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The concentration of the car exhaust fume nitrous oxide, NO2, in the air near a busy road is a function of distance from the road. The concentration decays exponentially at a continuous rate of 2.54% per meter.¹ At what distance from the road is the concentration of NO₂ half what it is on the road? Round your answer to the nearest integer. At i meters from the road the concentration of NO2 in the air is half the concentration on the road. At what distance from the road is the concentration of NO₂ 10% of what it is on the road? At i meters from the road the concentration of NO₂ in the air is 10% of the concentration on the road.

Chemistry 2. The following experimental data are obtained for the decomposition of nitrogen dioxide:   2 NO2(g) → 2 NO(g) + O2(g) ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ Time, s [NO2], M ln[NO2], [NO2]-1, M-1 ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ 0 10.0 x 10-3 -4.605 1.00 x 102    60 6.83 x 10-3 -4.986 1.46 x 102 120 5.18 x 10-3 -5.263 1.93 x 102 180 4.18 x 10-3 -5.477 2.39 x 102 240 3.50 x 10-3 -5.655 2.86 x 102 300 3.01 x 10-3 -5.806 3.32 x 102 ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ Plot a graph of ln[NO2] versus t and 1/[NO2] versus t. Determine the decomposition of NO2 follows a first order or second order rate law with respect to [NO2].

MISSED THIS? Read Section 15.5 (Pages 650 - 656) . Part A Which of these two reactions would you expect to have the smaller orientation factor? a. O(g) + N2(g) → NO(g) + N(g) b. NO(g) + Cl2(g) → NOCI(g) + Cl(g) Complete the sentences to explain your answer. Match the words in the left column to the appropriate blanks in the sentences on the right. Reset Help symmetrical Unlike in Yeaction (b), both reactants in reaction (a) are This makes NO(g) + Cl2 (g) → NOCI(g) + Cl(g) orientation in reaction (a) important. asymmetrical The reaction with the smaller orientation factor is expected to be O(g) + N2(g) → NO(g) + N(g) less more Submit Request Answer Provide Feedback

3. Circle the processes that are nonspontaneous Climbing stairs dissolving salt in water Converting table salt (NaCl) to its elements 2 H2O(1) → 2 H2(g) + O2(g) O Type here to search 12:20 AM 4/24/2021 80 D FIG H GIRAK

What is the mechanism and role of a catalytic converter in the reduction of harmful emissions from automotive exhaust gases?

Reaction 1 FeO(s) + CO(g) → Fe(1) + CO2(g) AG" > 0 Reaction 2: C(s) + CO2(g) → 2 CO(g) AGzn <0 Overall reaction: FeO(s) + C(s) → Fe(l) + CO(g) AG n < 0 Subm The chemical equations above represent the main reactions that occur during the production of Fe(l) under certain conditions. The overall reaction couples reactions 1 and 2, resulting in a < 0? thermodynamically favorable process. Which of the following best explains whether or not a particle diagram could represent how the coupling of reaction 1 and reaction 2 results in AG A particle diagram that represents the increase in the volume of gaseous product particles would be a good representation of how the coupling of reactions 1 and 2 results in a thermodynamically favorable process. A particle diagram that represents the decrease in the average kinetic energy of the particles would be a good representation of how the coupling of reactions 1 and 2 results in a thermodynamically favorable process. A particle diagram cannot represent…

so that means route a is preferrable in a small lab and route b is preferred in a chemical plant?

Give detailed Solution

For the reaction BrO3– + 5Br–+ 6H+ → 3Br2 + 3H2O at a particular time, –Δ[BrO3–]/Δt = 1.5 × 10–2 M/s. What is –Δ[Br–]/Δt at the same instant?

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How do I convert Nm to cm ? Then inches ?

Scientists can determine the age of ancient objects by a method called radiocarbondating. The bombardment of the upper atmosphere by cosmic rays converts bitrogen toa radioactive isotope of carbon, C-14, with a half-life of about 5730 years. Vegetationabsorbs carbon dioxide through the atmosphere and animal life assimilates C-14 throughfood chains. When a plant or animal dies it stops replacing its carbon and the amount ofC-14 begins to decrease through radioactive decay. Therefore, the level of radioactivitymust also exponentially decay. A parchment fragment was discovered that had about74% as much C-14 radioactivity as does plant material on the earth today. Estimate theage of the parchment.

4. Identify t -2 a) S → S

Scientists can determine the age of ancient objects by the method of radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive isotope of carbon, 14C, with a half-life of about 5,730 years. Vegetation absorbs carbon dioxide through the atmosphere, and animal life assimilates 14C through food chains. When a plant or animal dies, it stops replacing its carbon, and the amount of 14C present begins to decrease through radioactive decay. Therefore, the level of radioactivity must also decay exponentially. Dinosaur fossils are too old to be reliably dated using carbon-14. Suppose we had a 66 million year old dinosaur fossil. What percent of the living dinosaur's 14C would be remaining today? (Round your answer to five decimal places.) 0.0000007537 X % Suppose the minimum detectable amount is 0.2%. What is the maximum age (in years) of a fossil that we could date using 14C? (Round your answer to the nearest year.) yr

Scientists can determine the age of ancient objects by the method of radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive isotope of carbon, 14C, with a half-life of about 5,730 years. Vegetation absorbs carbon dioxide through the atmosphere, and animal life assimilates 14C through food chains. When a plant or animal dies, it stops replacing its carbon, and the amount of 14C present begins to decrease through radioactive decay. Therefore, the level of radioactivity must also decay exponentially.   a) Dinosaur fossils are too old to be reliably dated using carbon-14. Suppose we had a 67 million year old dinosaur fossil. What percent of the living dinosaur's 14C would be remaining today? (Round your answer to five decimal places.)   b) Suppose the minimum detectable amount is 0.7%. What is the maximum age (in years) of a fossil that we could date using 14C? (Round your answer to the nearest year.)

Scientists can determine the age of ancient objects by the method of radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive isotope of carbon, 14C, with a half-life of about 5,730 years. Vegetation absorbs carbon dioxide through the atmosphere, and animal life assimilates 14C through food chains. When a plant or animal dies, it stops replacing its carbon, and the amount of 14C present begins to decrease through radioactive decay. Therefore, the level of radioactivity must also decay exponentially. Dinosaur fossils are often dated by using an element other than carbon, like potassium-40, that has a longer half-life (in this case, approximately 1.25 billion years). Suppose the minimum detectable mass is 0.4% and a dinosaur is dated with 40K to be 67 million years old. Is such a dating possible? What is the maximum age (in millions of years) of a fossil that could be dated using 40K? (Round your answer to one decimal place.) (Can you…

Table 1 [A] M 0.200 0.200 0.400 The order in A is The order in B is k= Ok=[A]²[B] Ok=[A][B]² [B] M O k=[A][B] 0.0800 0.160 0.160 rate = k[A]²[B] Using the data in Table 1, fill in the blanks with a whole number (0,1,2,3,etc) rate = k[A][B] O M²s-1 Initial rate of production of Given the data in Table 1, what is the correct rate law for the reaction? rate = k[A][B]² C M/S 0.500 1.00 4.00 Given the value in Table 1, calculate the numerical value of k to three significant figures Given the data in Table 1, what are the units of k? O Ms¹ O M-²S-1

3 / 3 100% + | 5. The following series of reactions show the catalyzed conversion of oxygen to ozone: ½ 0, (g) + NO (g) → NO, (g) 2 NO, (g) → NO (g) + O (g) 2 O, (g) + O (g) → 0, (g) -> a) Write the overall reaction. b) Is NO, or NO the catalyst for this reaction? Explain your answer. the following reaction:

Everything needed is included. This is NOT graded, it is for practice. No grade is given for this. It is an old practice exam.  The oxidation of carbon monoxide is important in reducing ground-level pollution from cars: CO(g) + 1/2 O2 (g) −−→ CO2 (g)                                    Use the information you have available to answer the following questions. This reaction is typically run using a catalyst at elevated temperature. What is the value of ∆H◦ rxn for Equation 1 at a temperature of 700 K?

O to 185s? 185 to 416? 416 to 815 s? The decomposition of N,O, can be described by the equation 2 N,0,(soln) → 4 NO, (soln) + 0, (g) Consider the data in the table for the reaction at 45 °C in carbon tetrachloride solution. t (s) [N,0,] (M) 1.876 185 1.670 416 1.444 815 1.124 Given the data, calculate the average rate of reaction for each successive time interval.

The reaction rate for the decomposition of N2O5 to form NO2 and O2 was studied as a function of temperature. The first order reaction rate constants were found to be:    What is the Ea for this reaction in kJ/mol? Use Excel to plot the pertinent data and use linear regression to calculate the slope of the line connecting your data.

Consider the following balanced equation: Cl 2(g) + 2 Br (aq) → Br 2(aq) + 2 CI (aq) [CI 2] [Br ] Rate (M/s) 1.0.509 0.382 0.01544 2.0.613 0.382 0.02239 3.0.485 0.436 0.01600 What is the order with respect to chlorine gas? O -1 O 1/2 O 1 O 3/2 O 2 O 3 O 4 cannot be determined

Is the forward reaction endothermic or exothermic? Calculate the value of ΔH for this reaction Calculate the EA for the forward reaction. What is the total potential energy content of the activated complex?

Peroxynitric acid (HOONO2) is an unstable molecule that decomposes to nitric acid and oxygen: 2HOONO2(aq) → 2HNO3(aq) + O2(g)When the concentration of peroxynitic acid is graphed against time, the resulting plot is curved, but if the logarithm of this concentration is plotted, we instead get a straight line. Based on this, which statement is true? a)  This decay is a second order in peroxynitric acid. b)  The slope of the straight-line graph is the rate constant. c)  One needs the concentration of peroxynitric acid to calculate its half-life. d)  The rate law appears to be of the form -Δ[HOONO2]/Δt = k[HOONO2].

9. The half life of acetylsalicylic acid (the medicinal ingredient in Aspirin) is approximately 2 hours in adolescents. There is 275 mg of acetylsalicylic acid in one tablet of Regular Strength Aspirin. a) Write an equation that models the amount of acetylsalicylic acid in one's system after t hours. Assume the person has only taken 1 tablet of Regular Strength Aspirin. b) How much acetylsalicylic acid (to the nearest tenth of a milligram) is left a. After 6 hours b. After 2 days

The decomposition of N2O5 can be described by the equation

a) HJinitinl Rate in M-s 2.5 x 10 Experiment initial 1 0.0020 M 0.0050 M 2 0.0020 M 0.0025 M 1.3 x 10 0.0015 M 0.0025 M 1.3 x 10 4. 0.0050 M 0.0010 M 0.5 x 103 According to the experimental data and by considering the reaction given below, find and demonstrate the way to calculate the rate law. Explain each step. Initial rate data: 2H,(g) + Cl{g) –→ 2HCI(g) b) Consider this reaction. 4NH,(g) + 30,(g) 2N{g) + 6H,O(!) If the rate of formation of N, is 0.10 M-s, what is the corresponding rate of disappearance of O,? Explain step by step how to calculate the target value.

The activation energy and heat of reaction would decrease. A 75 g sample of aluminum is at room temperature (25°C). A student does a lab that causes the metal to absorb 68 J of heat. What is the new temperature of the aluminum? The specific heat of aluminum is 0.897 J/g. °C. Show Your Work 26°C 24°C 29°C 4.0°C %23

Chapter 13 is a Homework question. question 47. Please explain how can I do it without graphing it because if this question comes on the test how can I quickly solve this question without any graph and do it mathematically? If possible can you make a video? Thank you.

The formation of ammonia (NH) occurs according to the following equation N (9) + 3H (9) - 2N H, (a) The following data was collected over a period of time IHa), M INHl. M 0.4 Time (s) INl. M 0.1000 0.0500 0.035 25 0.25 0.1 50 0,205 О.13 0.1675 0.0225 0.012 75 0.155 100 0,136 0.176 125 0.0008 0.1024 0.1984 150 0.00065 0.10195 0.1987 Use the table to determine the rate of disappearance of hydrogen gas between 100 and 125 s. 7.44 x 10 M/s O 2.38 x 10 M/s о 1.34 х 10Эм/s O 4.20 x 102 M/S O 6.00 x 103 M/s

The decomposition of N,O, can be described by the equation 2N,0, (soln) –→ 4 NO, (soln) + 0, (g) Consider the data in the table for the reaction at 45 °C in carbon tetrachloride solution. 1 (s) [N,O;] (M) 2.287 165 2.062 466 1.706 725 1.449 Given the data, calculate the average rate of reaction for each successive time interval. What is the average rate of reaction for the time interval from 0 s to 165 s? average rate of reaction: 0.00136 M/s Incorrect What is the average rate of reaction for the time interval from 165 s to 466 s?