DAD 220 Module Three Major Activity

Explain how  the rate of reaction rate in pressure cookers was increased by including these subtopics:1. Chemical reaction(s) involved with chemical equation(s) 2. Reactants, products, and possible catalysts involved in the chemical reaction 3. Explain with collision theory and energy potential diagrams: how the rate of reaction is affected by temperature, surface area, nature of reactants, concentration, etc. by using collision theory? 4.Discuss whether the reaction is endothermic or exothermic (use Hess’s Law, Le Châtelier’s Principle, or Kinetic Molecular Theory to explain in increasing rate of reaction and relevance by including all 4 required subtopics )

Explain how the rate of reaction rate in pressure cookers was increased by including these subtopics:1. Chemical reaction(s) involved with chemical equation(s)2. Reactants, products, and possible catalysts involved in the chemical reaction3. Explain with collision theory and energy potential diagrams: how the rate of reaction is affected by temperature, surface area, nature of reactants, concentration, etc. by using collision theory?4. Discuss whether the reaction is endothermic or exothermi

Can you use the craap method to determine if the article by caltech titled Beirut explosion: TNT equivalence from the fireball evolution in the first 170 milliseconds is credible?explain why or why not?

Corrected True/False: Indicate whether each statement is true or false by circling the word true or the word false. If false, correct the statement to make it true in the space provided. 10. A physical change usually involves a greater enthalpy change than does a chemical change. True / False 11. In endothermic reactions the products have more kinetic energy than the reactants. True / False 12. The process of nuclear decay is a third order reaction. True / False 13. The rate-determining step is the slowest step in a reaction mechanism. True / False

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Route 1:RME = 82.92%MI= 1.34 Route 2RME = 93.33%MI = 1.57 Route 3RME = 57.34%MI = 1.89 Compare the value of Reaction Mass Efficiency (RME) and Mass Intensity (MI) generally, and choose which metrics is more significant in green measurement. Justify your answer.

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…

Tegacynv.schoology.com Atmospheric Carbon Dioxide Concentration Over Time 420 current 380 340 300 1950 260 220 180 140 400,000 350,000 300,000 250,000 200,000 150,000 100,000 50,000 0 (present) Years before present Source: NASA Global Climate Change, Carbon Dioxide Proxy Measurements, based on data from NOAA, June 2016 The rate at which carbon dioxide is being added to the atmosphere now is higher than ever before. higher lower co, (parts per million)

MITIMI DATAT 11 12 13 14 15 Pb(OH)4(aq) + H3PO4(aq) + C₂H6(s) + C3H8(s) + C5H10(s) + Cu₂O(aq)- ->> HCl(aq) O2(g) O2(g) O2(g) - PbO₂2(8) + CuOH(aq) PC15(s) + CO2(g) CO2(g) + CO2(g) + H₂O H₂O(g) H₂O(g) H₂O(g) SLIVEWOR Identify the type of chemical reaction happening in equations 1-15.

3. The decomposition of N2O5 in the gas phase was studied at constant temperature, 2N2O5 (g) → 4NO2 (g) + O2(g) The following results were collected: find nature) N2O5] 0.1000 Ln[N2O5] -2.30 2.65 2.99 -3.69 -4.38 -5.08 a. Complete the table. Using the data and graph paper, plot the [N2O5] versus time and Time (s) 10g. (LN) 0.0707 0.0500 50 0.0250 100 0.0125 200 0.00625 300 400 Ln[N2O5] versus time. Determine the value of k. Which graph did you use? graph *b. On your graph of [N2O5] versus time, highlight the times it takes for each halving of the reactant concentration. What is the half-life? Using this half-life calculate k. design experiments to find the activation energy,

General Chemistry for Engineers Lesson: Chemical Kinetics  Directions: Answer the following problems by showing the complete solution. In return, I will give you a good and high rating. Thank you so much! Note: Please input the units and measurements in the calculations. Thank you so much! Number 21 and 22

ALEKS-Andrew Herrera - с BREAKING: Trump Target X G co2 mass - Google Search X www-awa.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-lvgXwPgmUhvITCeeBZbufuBYTi0Hz7m7D3ZcS7wwwixkly301VUrFixkxntsU-sHou_SrXFcoeXT-... X G ml 1- Google Search 85°F Sunny OSTATES OF MATTER Using the combined gas law Exmlanation For many purposes we can treat nitrogen (N₂) as an ideal gas at temperatures above its boiling point of -196. °C. Suppose the temperature of a sample of nitrogen gas is raised from -96.0 °C to -78.0 °C, and at the same time the pressure is increased by 15.0%. Does the volume of the sample increase, decrease, or stay the same? x | Check If you said the volume increases or decreases, calculate the percentage change in % the volume. Round your answer to the nearest percent. -- Q Search increase LO O decrease O stays the same G140 in percent - Google Sear x + C 10 X 1/5 S © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center f

If you have both 1-hour and 8-hour data for ozone, report the higher AQI value. Suppose you had a 1-hour value of 0.163 ppm and an 8-hour value of 0.082 ppm. The reported AQI value should be Blank 1 and this falls under the category Blank 2 in the AQI scale.

Order from smallest to greatest

Match the symbol to its meaning. amount of material (counting by individual particles) E(a) collision frequency rate constant reduced mass N collision cross-section k steric factor amount of material (counting by moles) A pre-exponential factor lowercase Greek sigma activation energy lowercase Greek mu > >

3. Which of the following is the BEST document where a laboratory technician can read the recommendation on how to handle chemical spills? ○ NFPA O PERMISSIBLE EXPOSURE LIMIT (FEL) O MATERIAL SAFETY DATA SHEET (MSD)

Identify the oxidizing agent in the chemical reaction                    5Fe+2(aq) + MnO4-(aq) + 8H+(aq)                5Fe+3 + Mn+2(aq) + 4H2O(l)   The answer is ………………………………   Calculate the total number of atoms in 500 Ml OF 0.200 M KNO3 solution.     The answer is ………………………………                   Mg has three stable isotopes. Given a sample of Mg with the following masses and percent abundances: 24Mg:  23.9850 amu,   58.42% 25Mg:  24.9858 amu,   15.22% 26Mg:  25.9826 amu,   26.36% The average atomic mass (in amu) is ……………………   What mass of Na2SO4 is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M     The answer is ………………………

y courses / S22 CHEM 161_01_04 / 27 March - 2 April/ Quiz 9 Time left 0:53:13 Calculate the mass of oxygen that will be prepared through the decomposition of 50 kg of potassium chlorate ( KCIO3 , Molar mass= 122.55 g/mol) 2 KCIO3 →2 KCI + 3 O2 Select one: O a. 612 kg O b. 12.25 kg O c. 9.8 kg O d. 19.6 kg Next page

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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…

Not all XO molecules such as NO, survive long enough to react with oxygen atoms; some are photochemically decomposed to X and atomic oxygen, which then reacts with O, to re-form ozone. Write out the three steps (including one for ozone destruction) for this process and add them together to deduce the net reaction. Does this sequence destroy ozone overall, or is it a null cycle, which is defined as one that involves a sequence of steps with no chemical change overall?

A chemical is sprayed onto a lawn at a rate of 0.90 kg active ingredient per hectare. The chemical has a half-life of 30 days at 20C. A storm event occurs 15 days after application and causes 3.5% of the material present in the 25 hectare field to be lost (total losses). If average temperatures during the 15-day period were 17C, how much material (mass) was lost during the storm?

[15 minutes] Predict the chemical formula for the ionic compound that will form when the elements listed below combine as ions, and then name the compound. A. Al and S B. Kand N C. Sr and O D. Al and Cl E. Na and F 6/24/24 WILBERTH A. NARVAEZ | ELEMENTARY CHEMISTRY 19 19