BUS5461

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3. Standard white vinegar you can buy in the grocery store is 5% concentration. That means 5% of the liquid vinegar is acetic acid and 95% of the solution is water. In a hardware store, you can buy industria strength vinegar, which is 30% concentration. This means that 30% of the vinegar is acetic acid, and the remaining 70% is water. Samuel does another experiment, this time with 5% vinegar and 30% vinegar. He sets up two science fair volcanoes (in no particular order), each with the same temperature, mass of baking soda and volume o vinegar. But one volcano uses 5% vinegar and the other volcano uses 30% vinegar. He measures the volume of gas production for the'first minute of each reaction, and he records the data below. Volcano # 1 Volume of gas produced (mL.) vs. Time (s) for Volcano #1 Time Volume of gas (s) produced (ml) 60 E 50 10 20 30 25 8 40 38 46 30 20 Volume of gas produced (ml) 40 50 50 60 52 of 10 53 20 40 60 80 Time (s) Volcano # 2 Volume of gas Volume of gas produced…

Hello, can I get help with Part B & Part C. Thank you

s.com/course.html?courseld%3D15828855&HeplD353706194671Of71a192e43597b01c6e0#10301 Principles of Chemistry I (Chem 1107-327) signments <09 - Pre-Lab 9.11 Pre-Lab Methane burns in oxygen to produce CO2 and H2O. CH:(9) + 202(g)→2H»O(1) +CO2(g) Part A If 0.55 L of gaseous CH, is bumed at STP, what volume of O, is required for complete combustion? Hνα ΑΣφ Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining 40 DELL

16. The combustion of gasoline (octane) in a car engine can be represented by the following equation: 2C3H18(1) + 2502(g) a. What mass of oxygen is used up to burn a full tank of 36.00 kg of gasoline? Text --> 16CO2(g) +18H20(g) b. Why might a vehicle that is calibrated to run perfectly at sea level run poorly at higher elevations? Text Тext According to the Canadian Automobile Association, the average Canadian drives 20,000 km/yr. C. Assuming that distance, how many more kg of carbon dioxide are added to the atmosphere each year by a Toyota Tacoma (fuel economy of 12.8 L/100 km) than a Toyota Prius (4.52 L/100 km)? The density of gasoline is 0.719 kg/L.

Need help to calculate for percentage % recovery

You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.

QUESTION 24 In the experiment "Beer-Lambert's Law and Spectrophotometry", you prepared a calibration plot similar to the one pictured below. What is the approximate concentration of a solution whose absorbance is 0.35? Calibration Plot 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0. 0.01 0.02 0.03 0.04 0.05 Save A Click Save and Submit to save and submit. Click Save All Answers to save all wnswers. Absorbance

12 of 19 <. I Review | Constants | Periodic Table Part B Before investigating the scene, the technician must dilute the luminol solution to a concentration of 4.00×10-2 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00 L of the diluted spray? Express your answer with the appropriate units. » View Available Hint(s) moles of luminol = Value Units %3D

Complete the stoichiometry table using the starting values provided. vol. density (g/mL) molecular reagent mass (g) mmoles equivalents (mL) weight 3-nitrophthalic acid 0.463 hydrazine (8% aq. wt./vol) 1.00 1.139 sodium dithionite 5.323 theoretical product luminol Select the name of the catalyst used for this reaction, if there was no catalyst used, select none: none

1. Aluminum sulfate can be made by the following reaction: 2AlCl3(aq)+3 H2SO4(aq)➡Al(SO4)3(aq)+6HCl(aq). It is quit soluble in water, so to isolate it the solution has to be evaporated to dryness. This drives off the volatile HCl, but the residual solid has to be heated to a little over 200 celsius to drive off the water. In one experiment, 25.0 g of AlCl3 were mixed with 30.0 g of H2SO4. Eventually, 28.46 g of pure Al2(SO4)3 were isolated. Calculate the percentage yield. 2. The potassium salt of benzoic acid, potassium benzoate (KC7H5O2), can be made by the action of potassium permanganate on toluene (C7H8) as follows: C7H8+ KMnO4➡ KC7H5O2+ 2MnO2+ KOH+ H2O. If the yield of potassium benzoate cannot realistically be expected to be more tha 71%, what is the minimum number of grams of toluene needed to achieve this yield while producing 11.5g of potassium benzoate? 3. A chemist set up a synthesis of phosphorus trichloride by mixing 12.0g P with 35.0g Cl2 and obatained 42.2 g of PCl3.…

Because of the risk of lead poisoning, the exposure of children to lead-based paint is a significant public health concern. Thefirst step in the quantitative analysis of lead in dried paint chips is to dissolve the sample. Corl evaluated several dissolution techniques.24 In this study, samples of paint were collected and pulverized with a Pyrex mortar and pestle. Replicate portions of the powdered paint were then taken foranalysis. Results for an unknown paint sample and for a standard reference material, in which dissolution wasaccomplished by a 4–6-h digestion with HNO3 on a hot plate, are shown in the following table. (a) Determine the overall variance, the variance due to the method, and the variance due to sampling. (b) What percentage of the overall variance is due to sampling? (c) How might the variance due to sampling be decreased?

suppose your absent minded lab partner grabbed medium porosity filter paper instead of the fine porosity paper and you noticed cloudiness in your filtrate. will the reported concentration of limiting reactant solution be greater than, less than, or equal to the true concentration of limiting reactant solution? Na3PO4 and BaCl2 are the solutions used

Make an excel plot of InK versus ( s(). sp Insert a linear trendline and have the equation displayed on the chart. Record the value of the slope and the y-intercept of the trendline. Upload the graph in the Lab Report Submission link in Blackboard. kp 11 Solubility and Thermodynamics Lab Checker.htm ownload Exp 11 Solubility and Thermodynamics Lab Checker.htm (91.1 KB) Temperature of Crystal Solubility in M Ksp Formation in Kelvin 341 Correct 7.6 Correct 57.76 Correct 343 Correct 6.8 Correct 46.24 Correct 346 Correct 5.8 Correct 33.64 Correct 348 Correct 5.2 Correct 27.04 Correct 350 Correct 4.7 Correct 22.09 Correct Value or Calibration Curve M Incorrect or Calibration Curve 0.0026 M Incorrect ง

Chrome File Edit View History Bookmarks People Tab Window Help Bb LX Bb Bb 台 h + A labflow.com/app/course/362/report/7684#tab=REPORT : Apps B5 Blackboard Mail - Ava Schied... OUAConnect e Biology Syllabus >> REPORT SUMMARY Water Cyclohexane tF KMN04 Soluble Insoluble 12 Insoluble Soluble Sucrose Soldole Insoluble Vegetable oil Insoluble Soluble Electrolytes Lightbulb observation for 0.1 M NaCl Bright glow Lightbulb observation for 0.1 M sucrose No light Lightbulb observation for 0.1 M HCI Bright glow Lightbulb observation for 0.1 M acetic acid (HC2H302) Dim glow Lightbulb observation for 0.1 M NaOH Bright glow Lightbulb observation for 0.1 M NH,0H Dim glow Lightbulb observation for 0.1 M ethanol (C2H5OH) No light Concentration Mass of empty evaporating dish (g) 27.761 Volume of NaCl solution (mL) 9.9 Mass of evaporating dish and NaCl solution (g) 38.770 Mass of evaporating dish and dry NaCl (g) 29.450 OCT 3 T W

OSHA's Hazard Communication Standard requires chemical manufacturers to evaluate hazards relating to their products and provide a Safety Data Sheet in accordance to the Globally Harmonized System (GHS) in which the use of pictograms (see Figure 1) is required to communicate hazard information. Predict (with reasons) two (2) hazards related to each of the two activities below, and assign two (2) relevant pictograms listed in Figure 1 to each of the two activities. Activity 1: Removing diethyl ether (last opened in 2019) using a rotary evaporator. Activity 2: Using carbon monoxide gas as a reducing agent to reduce iron chloride. Figure 1. Pictograms advised by the Globally Harmonized System for communication of chemical hazards.

What is the actual or real-life application of precipitation gravimetric analysis? Include the specific methodology.

150 140 130 120 110 100 90 80 70 60 50 40 30 XCIO3 10 -Ce₂(506)s D Đ 10 20 30 40 50 60 70 80 90 100 Temperature (°C) According to the solubility curve graph above, a solution containing 10 g of NH3 at 90°C can be described as- unsaturated b insoluble supersaturated Time left for this assessment: d saturated 42:16 Grams of solute per 100 g H₂O B NaNO3 KNO3) NH Ka