Question 10 of 13 - Ch11 HW

D21 Quizzes - Spring 2023 × | с < + Your Chemistry answe × b Answered: Balance th × app.101edu.co 1 Balance the following chemical equation (if necessary): BF (s) + Li₂SO₂ (s) → LiF(s) + B₂(SO₂),(s) + 04- Reset 2 O B₂(SO3)3 0₂ 0 ♡ 3 3 Aktiv Chemistry ) Time's Up! 4 □ 5 Li₂SO₂ л n = O) 04 05 06 6 + Ch 12-14, 18 Public sp X 2+ 7 07 BF (s) (1) 3 ल ³+ 4+ 8 9 ☐8 (g) D2L Quiz 10-12 - Spring 20 X • x H₂O LiF 0 口。 (aq) Delete b Success Confirmation x | + Update: Submit

student found a bottle of unknown origin in the basement of an "CAUTION—contains С₁H₁O.” No other A old house. The bottle was labelled information was given, but inside the bottle were some white crystals. The student took the bottle to a chemistry laboratory, where she analyzed the crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4 adding one mole of Br, and forming C₁₂H₁OB2₂. When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two different samples, J and K, were obtained. Compound J had a molecular formula of C.HgO₂, and its NMR is shown below. Compound K had a molecular formula of C₂H₂O, and it could be oxidized to compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet (1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm. students, deduce possible…

High-fructose corn syrup is an immensely popular sweetener composed of mixtures of fructose and glucose. During manufacturing, the syrup contains small quantities of impurities that are removed by pumping the syrup over a bed of activated charcoal. All impurities absorb to the charcoal while the rest of the syrup passes through. Draw a diagram for the process and label it. Write the material balance(s) for the process. Your charcoal can absorb a maximum of 0.685 kg impurities per kg of charcoal. You are designing a purification process intended to process 203 lb of high-fructose corn syrup per hour. The syrup contains a very small fraction of impurities: 1.000 wt%. You’d like the charcoal to last for exactly 11 days before needing replacement. How much charcoal (lb) should be used?

Balance the following equation:  (select)123456789101112131415  I4O9 (s) +  (select)123456789101112131415  I2O6 (s)  →   (select)123456789101112131415  I2 (s) +  (select)123456789101112131415  O2

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…

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…

Sign in to edit and save changes to this file. 1. 121 49ln→ 121 + "5oSn 2. 8Be → 2_ 3. 1°4BE → °1B + 4. 8437Rb → °+1e + 128 128 5. 55CS→ 54Xe 6. 131m "s6Ba → oy + 7. 23793Np →42HE + ...

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 LD 50 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 LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 12 fluid ounce glass of the beverage you used in this lab. Assume that the concentration of Allura Red in the beverage is 0.000034 M. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL

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 LD 50 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 LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of number of glasses of Allura Red sports drink, each containing 8.8 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body weight. Assume the person has a body weight of 165 lbs. 2.205 lbs 1 kg !! You may assume two significant figures but do not use sčientific notation. Do not include units with your answer. Your Answer: Answer

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 LD 50 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 LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of number of glasses of Allura Red sports drink, each containing 11.1 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body weight. Assume the person has a body weight of 200 lbs. 2.205 lbs = 1 kg You may assume two significant figures but do not use scientific notation. Do not include units with your answer.

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 LD 50 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 LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of number of glasses of Allura Red sports drink, each containing 9.3 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body weight. Assume the person has a body weight of 225 Ibs. 2.205 Ibs = 1 kg %3!

A new analytic instrument is capable of detecting picogram quantities of a chemi-cal substance. How many times more capable is this instrument than one that candetect nanogram quantities of the same chemical?

In compounding a prescription, a pharmacist weighed 0.05 g of a substance on a balance insensitive to quantities smaller than 0.004 g. What was the maximum potential error in terms of percentage?

A certain copper ore contains 2.32% of Cu2S by mass, and the remainder of the ore contains no copper. In a particular year, a single open-air smelt furnace heated 37000 tons of this ore. Compute the maximum mass of copper metal that could have been obtained by this process. (Clarification: The tons in this problem are English tons, with 1 ton = 2000 lb. You can answer in g, kg, or lb, but the computer does not understand tons as a unit for the answer.)

duction to MasteringChemistry - Attempt 1 duction to Vocabulary Questions Reset Help maple 1. Hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as pine cedar elm and pine mango 2. Conifer leaves are generally thin and needle-like, while seeds are contained in cones. Conifers cedar include pine and elm elm 3. Deciduous trees lose their leaves seasonally and include trees such as mango and maple 4. Evergreens are plants that maintain their leaves in all seasons and include trees such as elm pine and cedar Submit Previous Answers Request Answer Introduction to Ma. fa トト」 トI fo fo ins prt sc 8% 8 9 10

Rosa was looking for patterns to help predict the products of chemical reactions. She recorded three similar decomposition reactions in the table. Reactants Products 2NACIO, 2NaCI + 302 302 + 2KCI 2KCIOз 2LICIO3 What products should she record in the last row of the table? O 2 LICI + 302 3LICI + 202 O 2 LiO + 3CI2 O 3LIO+ 2Cl2 Mark this and return Save and Exit Submit ntentViewers/AssessmentViewer/Activit.

phs.blackboard.com/webapps/assessment/take/take.jsp?course_assessment_id%3D 36688_1&course_id%3D_31958 1&content_id%3_1130567_1&- 8r 10 13 140 15 16 20 11 12 17 18 19 20 A Moving to another question will save this response. Quèstion 6 Select the statement that is not supported by the following equation: q=0=(mwater)(Cwater)(ATwater)+ (mmetal)(Cmetal)( ATmetal) The total change in heat is the sum of the changes in heat of water and a metal. Energy is conserved. Energy is transferred between water and a metal. Energy is lost during a calorimetry experiment. A Moving to another question will save this response. hp & %23 9. 6. 00 进3

To finance the development of a new product, a company borrowed $46,400 at 3.94% compounded quarterly. If the loan is to be repaid in equal quarterly payments [at the beginning] of every quarter over seven years and the first payment is due three years after the date of the loan, what is the size of the quarterly payments? Do not include the dollar sign, $, in your answers. Do not inc/ude the comma usually used to denote thousands. (a.) How much is owed after the deferral period? (b.) What is the size of the quarterly payments? (Hint: BGN must be up) Subject Finance Sub-subject Search To finance the development of a new product, a company borrowed $46,400 at 3.94% compounded quarterly. If the loan is to be repaid in equal quarterly payments [at the beginning] of every quarter over seven years and the first payment is due three years after the date of the loan, what is the size of the quarterly payments? Do not include the dollar sign, S, in your answers. Do not include the comma…

Which of the following statements is correct?

Q5. As part of the aspirin synthesis lab, the orgo students also had to perform the following calculation to demonstrate their knowledge. Are you able to help them work this out?Saponification is a process in which soap is produced from the chemical reaction between animal fat (triglycerides) and a strong base such as NaOH. An example of such a balanced chemical reaction is shown here:C57H110O6 + 3NaOH à C3H5(OH)3 + 3C18H35O2NaIf, during the saponification reaction, 228.5 g of C57H110O6 is mixed with 211.7 g of NaOH and 180 g of soap is produced: a. Calculate the theoretical yield of soap (in grams), C18H35O2Na, and indicate which species is the limiting reactant. Provide your answer to 2 decimal places. b. Calculate the percent yield for this reaction. Provide your answer to 1 decimal place. Show ALL steps and equations involved in your calculations. Remember to label all steps clearly and use appropriate units

please highlight the correct answer

CI(g) + H202 (ag) -› CI- (ag) + 02 (g) (acidic) Match the words in the left column to the appropriate blanks in the sentences on the right.

WPCI5 + XH2O ® yPOCl3 + 2HCI The above equation is properly balanced when Ow = 1, x = 2, y = 2, z = 4 O w = 2, x = 2,y= 2, z = 2 O w = 2, x = 2,y = 2, z = 1 Ow = 1, x = 1, y = 1, z = 2

Detailed calculations on how to prepare the solutions listed below Solution: 50 mL 1 M oxalic acid Oxalic acid Mw = 90.03 g mol-1 Oxalic acid purity = 98% Solution: 10 mL 3 M sulfuric acid Sulfuric acid Mw = 98.079 g mol-1 Sulfuric acid density = 1.84 g mL-1 Sulfuric acid purity = 98% Solution: 10 mL saturated potassium oxalate potassium oxalate (monohydrate used) Mw = 184.23 g mol-1 Solubility of potassium oxalate in water at 25°C = 360 mg mL-1 Solution :20 mL 3% hydrogen peroxide Hydrogen peroxide is commercially available as a 32% solution.

To standardize the sodium thiosulfate solution in the iodometric determination of copper, 2.29 grams of potassium iodate (KIO3; MW=214 g/mol) was dissolved in a 100.0 mL volumetric flask. What is concentration of the KIO3 solution? NOTE! Report your answer in scientific notation to 2 decimal places. Type your answer in a format similar to this example --> 3.21*10^-4. Type your answer...

Enter a balanced equation for the reaction between aqueous lead(II) nitrite and aqueous sodium bromide to form solid lead (II) bromide and aqueous sodium nitrite. Express your answer as a chemical equation. Identify all of the phases in your answer. | 圈 femplates Symbols undo redo reset keyboard shortcuts help ΑΣΦ . DA chemical reaction does not occur for this question.

Balance the following chemical equation. H₂O +CaCO3 →H₂O + Ca + CO₂ Assume the coefficient of CO₂ is 1. What is the balanced equation? |H₂O +CaCO3 → H₂O + Ca + CO₂

Hart Enterprises recently paid a dividend of $2.25. It expects to have a dividend growth rate of 12% for the first 3 years followed by a constant rate of 6% thereafter. The firm’s required return is 8%. What is the firm’s stock value today? Could you show how to find the solution using excel formulas and what to plug into them

The theory that argues that individual investors and financial institutions have specific maturity preferences is called the Multiple Choice liquidity preference theory. market segmentation theory unbiased expectations theory inverted forward theory

Part A transcript When glucose (C6H12O6 (s)) is consumed, it reacts with O₂ gas in the body to produce gaseous carbon dioxide and liquid water. Enter the balanced chemical equation for the reaction. Express your answer as a chemical equation including phases. 0 ΑΣΦ ? A chemical reaction does not occur for this question. Submit Previous Answers Request Answer

Ceramics used as abrasives must be hard and tough and be able to withstand high temperatures that arise from frictional forces. What is the minimum required hardness (measure in Mohs scale) for a material to be used as abrasive? Your answer

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.