AgOH (s) ↔ Ag+ + OH-
If the pH of a specific wastewater is initially 6.5 and after treatment is 10.0, what is the maximum concentration of soluble Ag+ in mg/L a) prior and b) after treatment? c) Is pH 13 enough to reduce silver concentrations to Secondary MCL (maximum contaminant level) of 0.1 mg/L?
Data:
1) Atomic weight: Ag=107.87 g/mole; O=16.00 g/mole; H=1.01 g/mole;
2) Assume that any other compounds or metals in this wastewater do not influence this solubility reaction.
3) The temperature of the wastewater is 25 ºC.
In: Other
PLEASE SOLVE ALL PARTS AND EXPLAIN IN DETAIL.
I'M HAVING A DIFFICULT TIME UNDERSTANDING HOW TO FIND/SOLVE THESE TYPES OF PROBLEMS:
In 2017, as reported by ACT Research Service, the mean ACT Math score was μ=20.6 μ=20.6 . ACT Math scores are normally distributed with σ=4.8 σ=4.8 .
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For each of the six business environments, identify at least one potential problem that your business may face. Explain this problem in one or two sentences.
PLEASE MAKE COPY PASTE AVAILABLE
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Highlights the different models used for SMEs transactions, and discuss differences between the models and General Accepted Accounting Principles (GAAP).
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Develop a branding strategy for your credit repair service service that covers the brand name, logo, slogan, and at least one brand extension.
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± Convert between Units of Concentration Chemists often use molarity M, in moles/liter, to measure the concentration of solutions. Molarity is a common unit of concentration because the volume of a liquid is very easy to measure. However, the drawback of using molarity is that volume is a temperature-dependent quantity. As temperature changes, density changes, which affects volume. Volume markings for most laboratory glassware are calibrated for room temperature, about 20∘C.Fortunately, there are several other ways of expressing concentration that do not involve volume and are therefore temperature independent. |
A 2.400×10−2M solution of NaCl in water is at 20.0∘C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was 999.4 mL . The density of water at 20.0∘C is 0.9982 g/mL. Part A Calculate the molality of the salt solution. Express your answer to four significant figures and include the appropriate units.
SubmitHintsMy AnswersGive UpReview Part Part B Calculate the mole fraction of salt in this solution. Express the mole fraction to four significant figures.
SubmitHintsMy AnswersGive UpReview Part Part C Calculate the concentration of the salt solution in percent by mass. Express your answer to four significant figures and include the appropriate units.
SubmitHintsMy AnswersGive UpReview Part Part D Calculate the concentration of the salt solution in parts per million. Express your answer as an integer to four significant figures and include the appropriate units.
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In: Chemistry
A 95% confidence interval for the average waiting time at the
drive-thru of a fast food restaurant if a sample of 192 customers
have an average waiting time of 92 seconds with a population
deviation of 23 seconds
round to the nearest hundredth of a second
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In: Psychology
Respond to ONE of the following scenarios. Identify and discuss the relevant legal issues and discuss them fully. Specifically state what you think the outcome will be and why. In Questions #1, be sure to include the applicable general rule(s) as well as any exceptions and whether they apply.
1. Jim Bowie owns a lot in Starr County and wants to build a house according to a certain set of plans and specifications. He solicits bids from three building contractors as follows: George Kimbell bids $ 175,000; Green Jameson bids $170,000; and, Davy Crockett bids $ 166,000. Bowie accepts Crockett’s bid and construction begins. A month into the work, Crockett advises Bowie that due to an unexpected rise in fuel and materials costs, he will need $ 15,000 more to complete the project. Bowie raises a fuss, but after discussing the situation with the out-bid contractors who indicate that they cannot finish the contract for less, he agrees. When the house is finished, he refuses to pay the extra money. Discuss whether Bowie is legally required to pay the additional amount.
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In: Economics
Exercise 7-15 Manufacturing: Direct materials, direct labor, and overhead budgets LO P1
MCO Leather Goods manufactures leather purses. Each purse requires 3 pounds of direct materials at a cost of $4 per pound and 0.7 direct labor hours at a rate of $10 per hour. Variable manufacturing overhead is charged at a rate of $2 per direct labor hour. Fixed manufacturing overhead is $11,000 per month. The company’s policy is to end each month with direct materials inventory equal to 20% of the next month’s materials requirement. At the end of August the company had 4,580 pounds of direct materials in inventory. The company’s production budget reports the following.
| Production Budget | September | October | November | |||
| Units to be produced | 4,800 | 7,200 | 6,500 | |||
(1) Prepare direct materials budgets for September and
October.
(2) Prepare direct labor budgets for September and
October.
(3) Prepare factory overhead budgets for September
and October.
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In: Accounting
Use Charles's law to complete the following table (assume pressure and number of moles of gas to be constant):
| V1 | T1 | V2 | T2 |
| 117L | 11.3?C | -- | 120.4?C |
| -- | 129K | 174L | 308K |
| 2.13L | 14.4?C | 2.43L | -- |
| 15.9cm3 | -- | 19.9cm3 | 11.4?C |
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Post a brief summary on the effects of globalization on health in Russia. Discuss one change in quality of life in post-transition Russia. Also, explain one change in mortality in post-transition Russia. Provide examples for both.
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To find the pKa of X-281, you prepare a 0.092M test solution of X-281. The pH of the solution is determined to be 2.40. What is the pKa of X-281?
In: Chemistry
Question 1
Given a normal distribution with µ =15 and σ =5, what is the probability that
INSTRUCTIONS: Show all your work as to how you have reached your answer. Please don’t simply state the results. Show graphs where necessary.
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