CHE 110 Milestone One Draft of Public Health Issue (1) (1)

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…

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

IRS whistleblowers testify at Hou: XM $4 off on Delicious, Rejuvenating X A ALEKS-Andrew Herrera - Learn X ← → C www-awa.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-lvgXwPgmUhvlTCeeBZbufuBYTi0Hz7m7D3ZcZsVtNxxGh3NolGhgexjUoyas3VCHOBjufyala7Wgbxc... ☆ = @ 89°F Near record Fill in the information missing from this table: 4- ELECTRONIC STRUCTURE AND CHEMICAL BONDING Calculating the capacity of electron subshells subshell 3s 5s Explanation 4p 2 Some electron subshells principal quantum number n 0 0 0 Check }° с angular momentum quantum number / ▬▬ 0 0 0 Q Search FO maximum number of electrons 0 П 10 F7 F8 8 F9 X 3 en F10 *- OF ** PrtSc W 0/3 Insert © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility @dx a Delete Andrew ^ 0 olo Ar O X ⠀ 4:45 PM 7/20/2023

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A 23-year-old woman with a history of asthma was brought to the emergency department by ambulance. She was extremely short of breath. Her level of consciousness was diminished greatly, and she was only able to respond to questions with nods or one-word responses. She had a weak cough, with nearly inaudible breath sounds. After drawing blood gases, she was placed on supplemental oxygen. Vital signs: heart rate, 160 bpm; blood pressure, 120/84 mm Hg; temperature, 37°C; and respiratory rate, 36/min. Her initial blood gas and total hemoglobin results were as follows: pH = 7.330 pCO2 = 25 mm Hg pO2 = 58 mm Hg HCO3 = 13 mmol/L tHb = 12.4 g/L QUESTIONS: 4. What clinical findings are most indicative of this patient’s impending failure?

(a) Available forms of nutrient are released from organic matter through the process of decomposition; (b) To order to have a sustainable system, the rate of addition from crop residues and manure must be less than the rate of decomposition. * A if a is correct B if b is correct C if both statements are correct D if neither statement a nor b are true

DDT (molar mass = This ban was brought about due to the persistence of DDT in many different ecosystems, leading to high accumulations of the substance in many birds of prey. The insecticide was shown to cause a thinning of egg shells, pushing many birds towards extinction. If a 20-L drum of DDT was spilled into a pond, resulting in a DDT concentration of 354.49 g/mol) was a widely used insecticide that was banned from use in the United States in 1973. 8.66 x 10-5 M, how long would it take for the levels of DDT to reach a concentration of 1.41 x 10-7 M (a level that is generally assumed safe in mammals)? Assume the decomposition of DDT is a first-order process with a half-life of 56.0 days. Time =|| days

Drug Concentration A pharmaceutical companyclaims that the concentration of a drug in a patient’sbloodstream will be at least 10% for 8 hours. Supposeclinical tests show that the concentration of a drug (aspercent) t hours after injection is given byC(t) = 200t/2t2 + 32During what time period is the concentration at least10%? Is the company’s claim supported by the evidence?

Strontium phosphate, Sr3(PO4)2Sr3​(PO4​)2​, dissociates when placed in water. This compound has a solubility of 0.112 mg/L in water at 20 °C.   Calculate the Ksp of Sr3(PO4)2Sr3​(PO4​)2​. Please write your answer using scientific notation according to the following format: 0.0010 would be writen as 1.0*10^-3.

If a field was sprayed with 2.5 x 104 g DDT per acre, how many years would it be for the concentration to drop to 50.0 grams per acre? Assume 365.25 days per year. Rate = 3.465 x 10-4 days-¹[DDT] =[?] years t, years Enter

"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

PLACE THE GIVEN, UNKNOWN, AND FORMULA TO USE.COMPUTE USING 3  SIGNIFICANT FIGURES FOR EACH STEP AND FOR THE FINAL  ANSWER.

A vehicle manufacturing company forms a plan to begin the production of vehicles with catalytic converters. Which is the best description of the regulation or program the company is trying to accommodate? A an effort set in place to stop public school bus drivers from running the engine when the vehicle is not in motion an effort set in place to allow the EPA to regulate emissions from motor vehicles in the United States C. an effort set in place to ensure that vehicles in the United States have an air pollution control device an effort set in place to encourage the manufacture of vehicles that have no emission control systems and no emissions from gasoline

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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)

t12 values for the degradation of chlorophyll-a in canned green beans heated at various temperatures Temperature ("C) t12 values (min) 105 22.6 115 4.2 125 1.2 At the same temperature range, the slope form the same graph was found as 0.0442 (with the same unit) for chlorophyll-b. As the temperature of the process increases, which chlorophyll will be more affected by the temperature increase? Explain in one sentence.

Explain the chemistry of the 2020 Beirut explosion.

PAP Chemistry-2903012-42100P-1 / Gases / Lesson 148 Aguilar All changes saved 25. The kinetic molecular theory says that collisions between particles are elastic, but real-world collisions do not follow this assumption. What is some of the kinetic energy changed into after a collision? O heat O light O potential energy O chemical energy SAVE & EXIT SUBMIT ALL ANSWERS PREVIOUS 25 of 25 96