Please assist- Done perfectly- Portland uses sodium hydroxide (NaOH).docx
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Please assist. Done perfectly. Portland uses sodium hydroxide (NaOH) to increase the pH of its drinking water to 8.0 as a high pH values, lead wil form lead hydroxides (Pb(OH)2) What concentration of Pb2* is expected to be found in the drinking water supply if lead pipes/fixtures are present (assume euilibrium conditions)? Is this concentration below the EPA action level threshold of 15 ppb? HINTS: Pb(OH)2(s) ?? Pb2+ + 2OH\' Ksp : 1.2*10-15 Recall, when using the Ksp equation, the concentrations are all in M (moles/L). Solution Pb(OH) 2 -----> Pb +2 + 2OH - K sp = [Pb +2 ] [OH - ] 2 = 1.2 x 10 -15 pOH = -log[OH - ] = 6 (pOH = 14-pH = 14-8 =6) [OH - ] = 10 -6 = 0.000001 K sp = [Pb +2 ] [OH - ] 2 = 1.2 x 10 -15 [Pb +2 ] (10 -6 ) 2 = 1.2 x 10 -15 [Pb +2 ] = 1.2 x 10 -15 /10 -12 = 1.2 x 10 -3 M [Pb +2 ] = 0.0012 moles/lt = 0.0012x mol wt = 12 x 207.2x 10 -4 = 2486.4 × 10 -4 g/lt = 24864 ppb No, the concentration of lead is more than thresold 15ppb .
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![Please assist. Done perfectly.
Portland uses sodium hydroxide (NaOH) to increase the pH of its drinking water to 8.0 as a high
pH values, lead wil form lead hydroxides (Pb(OH)2) What concentration of Pb2* is expected to
be found in the drinking water supply if lead pipes/fixtures are present (assume euilibrium
conditions)? Is this concentration below the EPA action level threshold of 15 ppb? HINTS:
Pb(OH)2(s) ?? Pb2+ + 2OH' Ksp : 1.2*10-15 Recall, when using the Ksp equation, the
concentrations are all in M (moles/L).
Solution
Pb(OH) 2 -----> Pb +2
+ 2OH -
K sp = [Pb +2
] [OH -
] 2
= 1.2 x 10 -15
pOH = -log[OH -
] = 6 (pOH = 14-pH = 14-8 =6)
[OH -
] = 10 -6
= 0.000001
K sp = [Pb +2
] [OH -
] 2
= 1.2 x 10 -15
[Pb +2
] (10 -6
) 2
= 1.2 x 10 -15
[Pb +2
] = 1.2 x 10 -15
/10 -12
= 1.2 x 10 -3
M
[Pb +2
] = 0.0012 moles/lt = 0.0012x mol wt = 12 x 207.2x 10 -4
= 2486.4 × 10 -4
g/lt = 24864
ppb
No, the concentration of lead is more than thresold 15ppb](https://image.slidesharecdn.com/pleaseassist-doneperfectly-portlandusessodiumhydroxidenaoh-230131011509-29bcead6/85/Please-assist-Done-perfectly-Portland-uses-sodium-hydroxide-NaOH-docx-1-320.jpg)
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a. 0.010 M NaCl pH will be approximately 7 because the solution.pdf
a. 0.010 M NaCl
pH will be approximately 7 because the solution will be neutral
b. 0.010 M NaOH
0.01 M NaOH
pOH= -log(0.01) =2
pH +pOH =14
pH = 12
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the x in denominator can be ignored as the value is much smaller than 1
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Solution
a. 0.010 M NaCl
pH will be approximately 7 because the solution will be neutral
b. 0.010 M NaOH
0.01 M NaOH
pOH= -log(0.01) =2
pH +pOH =14
pH = 12
c. 0.010 M NH3
NH3 + H2O NH4(+) + OH-
Kb = 1.8*10^-5 = [X]2/(1 - X)
the x in denominator can be ignored as the value is much smaller than 1
1.8*10^-5 = [X]2
[OH]=[X]=4.243*10^-3
pOH = -log[OH]=2.37
pH +pOH =14
pH = 11.63
d. 0.010 M malonic acid
pka1=2.85,pka2=5.70
concentration doesnot matter for diprotic acids
pH= (pka1 + pka2) /2
pH=(2.85+5.70)/2=4.275.
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This document discusses alcohols, including their structure, nomenclature, classification, physical properties, acidity and basicity, and methods of preparation. Key points covered include that alcohols contain an -OH functional group, can be classified as primary, secondary or tertiary based on carbon atom bonding, associate through hydrogen bonding affecting physical properties, and can be prepared through fermentation, hydration of alkenes, nucleophilic substitution, and reduction of carbonyl compounds.
a. 0.010 M NaCl pH will be approximately 7 because the solution.pdf
a. 0.010 M NaCl
pH will be approximately 7 because the solution will be neutral
b. 0.010 M NaOH
0.01 M NaOH
pOH= -log(0.01) =2
pH +pOH =14
pH = 12
c. 0.010 M NH3
NH3 + H2O NH4(+) + OH-
Kb = 1.8*10^-5 = [X]2/(1 - X)
the x in denominator can be ignored as the value is much smaller than 1
1.8*10^-5 = [X]2
[OH]=[X]=4.243*10^-3
pOH = -log[OH]=2.37
pH +pOH =14
pH = 11.63
d. 0.010 M malonic acid
pka1=2.85,pka2=5.70
concentration doesnot matter for diprotic acids
pH= (pka1 + pka2) /2
pH=(2.85+5.70)/2=4.275
Solution
a. 0.010 M NaCl
pH will be approximately 7 because the solution will be neutral
b. 0.010 M NaOH
0.01 M NaOH
pOH= -log(0.01) =2
pH +pOH =14
pH = 12
c. 0.010 M NH3
NH3 + H2O NH4(+) + OH-
Kb = 1.8*10^-5 = [X]2/(1 - X)
the x in denominator can be ignored as the value is much smaller than 1
1.8*10^-5 = [X]2
[OH]=[X]=4.243*10^-3
pOH = -log[OH]=2.37
pH +pOH =14
pH = 11.63
d. 0.010 M malonic acid
pka1=2.85,pka2=5.70
concentration doesnot matter for diprotic acids
pH= (pka1 + pka2) /2
pH=(2.85+5.70)/2=4.275.
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The function and process whereby physicians, nurses, and social workers proactively arrange for post-hospital care is known as: Select one: The direction, control, and governance of U.S. hospitals rests on a three-legged platform involving which entities: Patients have the right to set limits on the scope of treatment, but cannot refuse treatment after it is finally and formally recommended by a physician:
Solution
1. Physians, nurses and social workers arrange for post-hospital care in the process of Discharge planning.
2. a. Board of Directors (trustees), Administration, Medical staff
3. False. The patients have right to refuse treatment at any stage of treatment.
4. c. Healthcare promulgator, healthcare regulator, healthcare payer
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The four components of aggregate expenditures are- Question 3 options-.docx
The four components of aggregate expenditures are:
Question 3 options:
Solution
The four components of aggregate expenditures are: 4 = consumption, investment, government spending, and net exports.
I hope my solution solves your query.
Regards.
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The IS staff wants to know about important management tools built into.docx
The IS staff wants to know about important management tools built into Windows Server 2008. In your opinion, what two management tools that will be of useful for them?
Solution
1) Windows System Resource Manager : It provides resource management to control the amount of resources a process or a user can use based on business priorities. Restrictions can be set to be imposed by
2) Server Manager : New roles-based management tool for Windows Server 2008 and is a combination of Manage Your Server and Security Configuration Wizard SCW from earlier version of windows (Windows Server 2003).Instead of just a starting point to configuring new roles, Server Manager collect all of the information regarding operations a users conduct ( or probably perform )on the server, such as, getting a remote deployment method set up, adding more server roles etc., and provides a consolidated, dashboard/portal-like view about the status of each role.
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The Inventive Co- is considering a new project- This project requires.docx
The Inventive Co. is considering a new project. This project requires an initial cash investment of $84,000. The project will generate cash inflows of $14,000 in the first year. Then, the project will do nothing for two years, after which time cash inflows of $38,000 will be generated for four years. How long will it take the Inventive Co. to recover its $84,000 investment?
The net present value of a project\'s cash inflows is $12,933 at a 11.2 percent discount rate. The profitability index is 1.55 and the firm\'s tax rate is 26 percent. What is the initial cost of the project?
Solution
1-cost of project=84000
Cash inflows
1- 14000
2 0
3. 0
4. 38000
5. 38000
6. 38000
7. 38000
8 38000
Payback period is 4.842 years
It a confusion whether 2nd part is in contiuation of 1st one or its a different question
If its a part of question mentioned above initial investment is 84000
If its a another part then information is incomplete neither no of Year are Given nor amount of cash flow is given so ut is impossible to calculate initial investment
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The internal document that is prepared to notify the appropriate perso.docx
The internal document that is prepared to notify the appropriate persons that ordered goods have been received and describes the quantities and condition of the goods is the
Solution
Receiving report.
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The Impact of Technology on the Developing Child name 7 negative ways it can
Solution
1. Now a days, children play time is majorly occupied by the gadgets, and thus lacking their physical abilitiy to achieve sensory and motor development.
2. Due to availability of gadgets like calculators, and mobile phones, children are loosing their ability to memorize/analyze their simple things like calculations, or memorizing phone numbers.
3. Child obesity is one of the impact of technology on developing child. This is just because of lack of physical activity.
4. Children are lacking their family life, due to the business of parents, and therefore getting addicting to gadgets, and missing human relations.
5. The availability of gadgets to parents, and therefore, their ability to work from home, is inflicting negligence towards their children.
6. Children addiction towards television and internet, are lacking their sleep during nights.
7. Due to various programs over internet, and television, children are pyschologically loosing their mind, and dreaming of almost impossible things in real world.
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The Homeland Security Act of 2002 is divided into 17 titles while brin.docx
The Homeland Security Act of 2002 is divided into 17 titles while bringing together under one umbrella more than 22 federal agencies. Select one such agency and describe their role and responsibilities in HLS. Which agencies do you believe they would work most closely with at an emergency response incident?
Solution
Federal Emergency Management Agency(FEMA) is an agency of the United States Department of Homeland Security,
roles and responsibilites:-
->FEMA manages the National Flood Insurance Program..
->National Disaster Medical System (NDMS):NDMS is made of teams that provide sufficient medical and allied care to disaster victims. These teams contain doctors, nurses, pharmacists, etc.
->National Response Coordination Center (NRCC):- provides emergency management coordination, planning, resource deployment, and collects and disseminates incident information as it builds and maintains situational awareness—all at the national-level
->Urban Search and Rescue (US&R):perform rescue operations of victims from structural collapses, confined spaces, and other disasters..examples :earth quakes...gas leakes..etc
->Mobile Emergency Response Support (MERS):-provides communication support to the people..
->Preparedness for nuclear incidents and Emergency Management Institute training and certifications.
->FEMA is one agency tha works most closely with at an emergency response incident....
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The Homeland Security Act of 2002 is divided into 17 titles while brin (1).docx
The Homeland Security Act of 2002 is divided into 17 titles while bringing together under one umbrella more than 22 federal agencies. Select one such agency and describe their role and responsibilities in HLS. Which agencies do you believe they would work most closely with at an emergency response incident?
Solution
The Homeland Security Act is purely designed for more security from International Threats for UN people’s. The Homeland Security Act is established in November 2002 signed bylaw by The President Mr. George W.Bush and supported in 118 members of Congress. The main reason is Security fails in attacks of 9/11and subsequence mailings of Anthrax Spores.
HSA is created new environment for security reasons avoids in Services, High risk of Terriost Attacks, Elevated, Guarded, Cyber Attacks.
HSAct is Similar to IIRTPA but newly designed for more security reasons. It is mainly used in Government Bodies like Customs Services, Coast guard and U.S. Secret Services and NIA . It is more protect for UN Peoples from severe risk of Terriost Attacks, High Threat from Illegal notices, Elevated ,Guarded for unwilling risks and Low magnificence risks.
The Homeland Security Act is documented under the divided into Titles out of 22 Titles. The Titles 17 consisting of seven (7) sections include several acts amendments of United States backbone act is Inspector General Act of 1978 and Titles of Security Service Number with 5 Titles of United States codes.
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The following table contains national income accounting data for a hyp.docx
The following table contains national income accounting data for a hypothetical economy
The following table contains national income accounting data for a hypothetical economy
Solution
hi
I took me while to figure this out but i think i got it.
To find Disposable Income (DI) you first need to find your GDP (Y).
Y= C + I + G + (X-M)
Y = 300 + 50+ 5 + 70
Y=425
So the formula for DI ( Gross Income - Taxes + Transfer Payments) is
DI = Y - T + TP
DI = 425 - 75 + 15
DI = 365
From that you can find savings (Whatever is not consumed is saved)
S= DI - C
S = 365 - 300
S = 65
To find the leakage (Withdraws) just add up the components (Savings + Net Tax +Imports)
W=S + NT + M
W= 65 + 75 + 5
W = 145
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The following items are taken from the financial statements of the Pos.docx
The following items are taken from the financial statements of the Postal Service for the year ending December 31, 2014:
Solution
Total liabilities = Accountspayable + Notes payable
Total liabilities = 18000+70000 = $88000
Owners Equity = 102000-14000(owners drawings)
=$88000
The Current entry for lawer is
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The following program has already been written to populate its data ar.docx
The following program has already been written to populate its data array with 10 values entered by the user. Using a loop, complete the program so that it displays “palindrome†if the array is the same read backwards as forwards (as in <9, 13, 15, 15, 13, 9>, which reversed is the same) and “no†otherwise.
int main() {
int data[10];
int i;
for (i = 0; i < 10; i++) {
printf(\"Value %d: \", i + 1);
scanf(\"%d\", &(data[i]))
}
Solution
int main() { Â Â Â Â int data[10]; Â Â Â Â int i; Â Â Â Â int all_match; Â Â Â Â for (i = 0; i < 10; i++) { Â Â Â Â Â Â Â Â printf(\"Value %d: \", i + 1); Â Â Â Â Â Â Â Â scanf(\"%d\", &(data[i])) Â Â Â Â } Â Â Â Â all_match = 1; Â Â Â Â for (i = 0; i < 5; i++) { Â Â Â Â Â Â Â Â if (arr[i] != arr[9 - i]) { Â Â Â Â Â Â Â Â Â Â Â Â all_match = 0; Â Â Â Â Â Â Â Â } Â Â Â Â } Â Â Â Â if (all_match) { Â Â Â Â Â Â Â Â printf(\"palindrome\ \"); Â Â Â Â } else { Â Â Â Â Â Â Â Â printf(\"no\ \"); Â Â Â Â } }
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The German philosopher Immanuel Kant condemned Utilitarianism as an im.docx
The German philosopher Immanuel Kant condemned Utilitarianism as an immoral ethical theory mainly because:
It does not sufficiently take into account stakeholder interests.
It can morally legitimize pain and suffering and infringement of rights so long as the greater good is achieved.
It is not sufficiently democratic.
It is not as scientific and mathematical as the Utilitarians said.
Solution
It does not sufficiently take into account stakeholder interests.
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The graph of temperature versus molar mass is given for the hydrides o.docx
The graph of temperature versus molar mass is given for the hydrides of oxygen, sulfur, selenium, and tellurium. The points given are the melting (Mp) and boiling (Bp) points of the hydrides.
The melting and boiling points decrease from hydrogen telluride, H2Te, to hydrogen sulfide, H2S; however, we find an abrupt increase in the melting and boiling points for water. Water shows an abrupt increase in its melting and boiling points because the water molecule has stronger intermolecular forces than the hydrides of sulfur, selenium, and tellurium.
Which of the following statements explain this anomalous behavior of water?
Check all that apply.
View Available Hint(s)
Check all that apply.
H20 HoTe Bp 25 Mp Molar mass (g/mol)
Solution
Options (b) and (c) explains the anomalous behaviour.
Due to stronger intermolecular hydrogen bonding apart from weak London forces (e.g, Vander Waals forces) that exists in other compounds also there is an abrupt increase in melting and boiling point of water. London forces are weakest forces and therefore, it requires more energy to break hydrogen bonds than to break them.
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The general role of financial intermediaries is to- A-Provide advice t (1).docx
The general role of financial intermediaries is to:
A.Provide advice to consumers on how they should handle their finances.
B.Help ensure there is enough money in circulation.
C.Provide funds to the federal government to finance a trade deficit.
D.Channel money from savers to those who want to borrow.
Solution
D. Channel money from savers to those who want to borrow.
Explaination:
A financial intermediary is a financial institution that borrows from savers and lend to individuals or firms that need resources for investment. The investments made by financial intermediaries can be in loan and/or securities.
The principle role of financial intermediaries is transforming financial assets that are less desirable for a large part of the public into other financial asset, which is preferred more by the public. This transformation involves at least four economical functions: providing maturity intermediation, risk reduction via diversifications, reducing the costs of contracting and information processing and providing a payment mechanism.
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The general role of financial intermediaries is to- A-Provide advice t.docx
The general role of financial intermediaries is to:
A.Provide advice to consumers on how they should handle their finances.
B. Help ensure there is enough money in circulation.
C.Provide funds to the federal government to finance a trade deficit.
D. Channel money from savers to those who want to borrow.
Solution
D. Channel money from savers to those who want to borrow.
Explaination:
A financial intermediary is a financial institution that borrows from savers and lend to individuals or firms that need resources for investment. The investments made by financial intermediaries can be in loan and/or securities.
The principle role of financial intermediaries is transforming financial assets that are less desirable for a large part of the public into other financial asset, which is preferred more by the public. This transformation involves at least four economical functions: providing maturity intermediation, risk reduction via diversifications, reducing the costs of contracting and information processing and providing a payment mechanism.
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The functional group RCO2R-' is characteristic of a(n) ____- 1) 2) 3).docx
The functional group RCO 2 R\' is characteristic of a(n) ____.
1)
2)
3)
4)
5)
1)
2)
3)
4)
5)
Solution
1) General formula given is of ESTER.
2) The class of the compound given is PHENOL.
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The following information pertains to Naomi Campbell Company as of Dec.docx
The following information pertains to Naomi Campbell Company as of December 31, 2011. Assume that all sales were on credit. Accounts receivable (net) as of January 1, 2011 were $35,000 and inventory was $30,000.
Assets
Cash and short-term investments $ 40,000
Accounts receivable (net) 25,000
Inventory 20,000
Property, plant and equipment 210,000
Total Assets $295,000
Liabilities and Stockholders
Solution
Formula for inventory turnover ratio = Cost of goods sold/Average inventory
Given cost of goods sold = $45,000
Average inventory = (Opening stock+ Clsoing stock)/2
=($30,000 + $20,000)/2
= $50,000/2
=$25,000
Substituting the values in the formula
=$45,000/$25,000
=1.8 times.
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The G Banking Group recently reported that it was offshoring (moving) its back-office operations from European country D to India where it alreadyhas some significant operations. Centralising most back-office operations in India is part of the Group
Solution
Growth of BRIC Economies
Currently the most important growing economies in the world are Brazil, Russia, India and China and they have come to be known as the BRIC group. The growth of each of these economies contains unique aspects of the history of each country but there are some general factors that have influenced the growth of all four. These include the following:
General factors driving growth
Globalisation
This concept refers to the growing interdependence of countries worldwide and the freedom it gives to firms and individuals to initiate economic transactions with those in other countries. Factors that have contributed to the globalisation process include;
_ developments in electronic communication such as the internet,
_ improvement in transportation such as containerisation and the development of jumbo jets,
_ convergence of tastes through the development of foreign travel and the world wide media,
_ the reduction of trade barriers assisted by organisations like the World Trade Organisation (WTO) enabling the opening up of trade between countries and
_ the growing readiness of multinational enterprises (MNE
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Please do not answer if you-'re unsure of the answer- Thanks!.docx
Please do not answer if you\'re unsure of the answer. Thanks!
Solution
Participate in the intervention
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Please describe the process of the Implementation of Role-based access controls for optimal database security. provide instructions on how to implement this process as well as advantages and disadvantages of this type of access. Also explore the many different types of access controls that can be implemented to change the security of databases
Solution
Role based access control mean restricting user access for some resources like nodes,printers,scanners and applications in an organisation/
The main advantages are Authentication, authorization and auditing.
The basic actors of an RBAC are resources,permisiions,users and roles.The model is based on different entites in the system that require permission ,attributes to update and view.
Role based access helps you to decide what roles and permissions to assign for a particular resource.
While giving restrictions there should be list of roles which are one to one related with an entity.
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There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
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Please assist- Done perfectly- Portland uses sodium hydroxide (NaOH).docx
- 1. Please assist. Done perfectly. Portland uses sodium hydroxide (NaOH) to increase the pH of its drinking water to 8.0 as a high pH values, lead wil form lead hydroxides (Pb(OH)2) What concentration of Pb2* is expected to be found in the drinking water supply if lead pipes/fixtures are present (assume euilibrium conditions)? Is this concentration below the EPA action level threshold of 15 ppb? HINTS: Pb(OH)2(s) ?? Pb2+ + 2OH' Ksp : 1.2*10-15 Recall, when using the Ksp equation, the concentrations are all in M (moles/L). Solution Pb(OH) 2 -----> Pb +2 + 2OH - K sp = [Pb +2 ] [OH - ] 2 = 1.2 x 10 -15 pOH = -log[OH - ] = 6 (pOH = 14-pH = 14-8 =6) [OH - ] = 10 -6 = 0.000001 K sp = [Pb +2 ] [OH - ] 2 = 1.2 x 10 -15 [Pb +2 ] (10 -6 ) 2 = 1.2 x 10 -15 [Pb +2 ] = 1.2 x 10 -15 /10 -12 = 1.2 x 10 -3 M [Pb +2 ] = 0.0012 moles/lt = 0.0012x mol wt = 12 x 207.2x 10 -4 = 2486.4 × 10 -4 g/lt = 24864 ppb No, the concentration of lead is more than thresold 15ppb