163_PS1_PartA_S24_1019

26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about 36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons. Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving assumptions you make in this calculation rea L-36 Tile fiDw ill it cost2 The density of gold is 27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50

Assume the average person needs 75mg of vitamin C per day. If you were to travelacross the Atlantic Ocean (a 50 day voyage), how much (in volume) of your commercialsample would be needed?

Answer questions 1 and 2 according to the data given. Dater Weight of cream i: 326 kỳ. Table shows some data obtained directly from Lactascan instrument. Fat % SNF % Lacto- density 27.32 30.23 Raw milk 4.15 7.97 Skim milk 0.08 8.26 Q1. Calculate fat percent of creamn A) 46 B) 28 (C) 3D D) 0.046 آدرما 396 100 x Q2. Calculate efficiency of the cream separator. A) 100% B98% C) 97% D) 96% E) 87.2% amount 2500 L E) 0.28

I just need help with line A7 across.

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.

B NA BH2 bh3 S = 6 6H Calculator: NA indicates neutral axis Section Modulus I Beam Universal Calculator For the next four questions (including this one) ignore k and k1 in your calculations. Using the same table, enter the value for B in inches. (three sig figs)

question 2 and 3 with detail and reasons for each question

1-38. To entertain children between the ages of 2 and 90, I enjoy popping corks from bottles containing vinegar and baking soda pour about 50 mL of vinegar into a 500-mL plastic bottle. Then I wrap about 5 g of baking soda (which is sodium bicarbonate, NaHCO3) in one layer of tissue and drop the tissue into the bottle I place a cork tightly in the mouth of the bottle and step back. The chemical reaction generates CO2(g) that pressurizes the bottle and eventually bursts the cork into the air. Everyone smiles. I CH2CO2HNaHCO3 >CH2CO2 + Na + CO2(g) H2O Acetic acid Sodium bicarbonate in vinegar in baking soda (a) Find the formula mass of acetic acid and of sodium bicarbonate (b) How many grams of acetic acid are required to react with 5 g of NaHCO3? (c) Vinegar contains ~5 wt% acetic acid. How many grams of vinegar are required to react with 5 g of NaHCO3? The density of vinegar is close to 1.0 g/mL. How many mL of vinegar are required to react with 5 g of NaHCO3? (d) Which is the limiting…

STARTING AMOUNT esc C X C 2 F2 W # 3 1000 F3 ADD FACTOR x( ) $ 4 1 97.9 FS de in % 5 2 Convert 23.4 kJ to calories 2.34 x 104 t 4184 kcal 6 P 0.001 J 4.184 COMEC DOLL ANSWER & 7 9.79 × 104 cal 00 8 RESET FO 2 23.4 ( 5590 A FIT 120 Jan 21 del +

Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL 2.205 lbs = 1 kg You may assume…

$ F4 An aqueous solution of 2.87 M hydrochloric acid, HCl, has a density of 1.05 g/mL. The percent by mass of HCl in the solution is %. Submit Answer % 5 T G F5 Retry Entire Group 9 more group attempts remaining 6 Cengage Learning | Cengage Technical Support Y H [Review Topics] [References] Use the References to access important values if needed for this question. MacBook Air F6 & 7 gilinent-take F7 8 00 1 DII FB K ( 9 F9 0 L ) O A F10 P Chapter Previous + 11 X Next ☐ Save and Exit OWLY S deles

CH₂-COOH Citric acid has the formula HO-C-COOH I CH₂-COOH CH2–CDD - Na* + HD-C-CDD- Na CH₂-COO- COO-Na A 25.0 mL sample of a concentrated citrus fruit cordial component (e.g. for lime juice), used in the food & drinks industry, was diluted to 250 mL in a graduated volumetric flask. A 25.0 mL sample of this diluted solution, required, on average, 22.5 mL of a standard 0.100 molar sodium hydroxide solution using phenolphthalein indicator for the titration end-point. A) 0.0075 Assuming all the acid in the cordial was citric acid, calculate the concentration of the acid in g/mL in the original solution. B) 0.576 D and is tribasic acid, forming the tri-sodium salt on complete neutralisation with sodium hydroxide. 1.44 0.00225

I need answers for # 2-9 on this worksheet

Please answer questions 3 and 4 and show work please. Thank you

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I need help with questions 1-4? Also if I'm wrong on question 1 can you do it again? If not you can continue with questions 2-4?

Explain your rationale for using the summative assessment (below) from the lesson plan on mixing substances in a 5th-grade classroom based on the below standard and learning objective, including how it aligns with the learning objective.  Summative Assessment  Summative: Components of the Lab Report Purpose: The student should clearly state the purpose of the experiment, which is to determine whether the mixing of two or more substances results in new substances. Procedure: The student should describe the steps they took to conduct the experiment. This includes the substances they chose to mix and the safety equipment they used. Observations: The student should record any observable changes that occurred when the substances were mixed. This could include a color change, the formation of a precipitate, or a change in temperature. Conclusion: The student should state whether a new substance was formed based on their observations. They should also reflect on their accuracy in…

Hey! Could you check these answers to make sure they are all correct? If they aren't, could you please help me to figure out what I did wrong?

Absorbance (arb.units) SA 8.3 B-Carotene Calibration Curve 2004 65,03UM 3.26 mM 5,06 nM y=(105612 Mx-0.1736 2.94 M 4304 1064 ENY 181 121 Concentration (M) 1004 5 Abserbence (arb.units) 200 0.25 300 A student creates a standard curve of B-Carotene and plots the line of best fit. They then measure the absorbance of a solution of B-Carotene with an unknown concentration. What is the concentration of the sample? You can assume they used a cuvette with a pathlength of 1 cm. 400 500 600 Wavelength (nm) YOU

Q2. Two widely used pain relievers are aspirin and acetaminophen (Tylenol). “Liquid” Children's Tylenol® is simply acetaminophen suspended in fruit-flavored sugar water with food coloring and an acid buffer. As you may know, "children's medications" are big money makers for pharmaceutical companies. Despite this fact, the liquid form of Children's Aspirin is NOT commercially available. CONCISELY explain why liquid Children's Aspirin is not available (HINT: cannot be prepared!) CH3 میں میں aspirin OH HO .NH–C acetaminophen

Please provide all answers in the spaces provided. All answers must be hand drawn using a pencil, a pen, or an equivalent tablet device. Answers that are typed, drawn using templates, or pasted from the Internet (!!!) will not be accepted. You should upload your problem sets into Gradescope after scanning them with your phone or exporting your tablet drawings as a pdf file. You are strongly encouraged to work in groups while completing this problem set, but each student must turn in their own copy of the answers. Please let us know if you have any questions or need further instructions. 1. Provide the reagent(s) that would be required for each of the following synthetic transformations. Please note that some of the reactions involve multiple steps. In cases where relative stereochemistry is shown (i.e. wedges and dashes, E-or Z-alkenes, etc.), your reagents should be selected to yield the correct isomer as the major product. You do not need to supply any arrow pushing mechanisms, but…