# Calculate the pH of the solute in an aqueous solution of 0.0047 M codeine, if the pKa of itsconjugate acid is 8.21. What is the percentage protonation of the solute?

46,915 questions, page 156-
## Math

What is an estimate of the solution of the equation 6n+3=2? Use a table Can someone help me plzz?

*asked by Madison Kayla on October 25, 2017* -
## chemisty

how many grams of KCL are there in 1200 ml of a 2% KCI solution

*asked by shon on January 6, 2010* -
## bio tech

Describe hpow you would prepare 2 L of a 0.5 g/ml dextrose solution?

*asked by kim on February 21, 2016* -
## math

Write the inequality that represents the solution set for −15/9 y

*asked by z on February 20, 2017* -
## chemistry

What is the concentration of a solution if the absorbance is 0.66 and the constant (a x b) is 8.2 L/mol?

*asked by aaloy on October 1, 2008* -
## algebra

Graph the solution of each linear inequality. y

*asked by janet on December 22, 2009* -
## Math 1

Find the solution and write a word problem for 5/12 - 1/3 and 1/2 - 2/3

*asked by Anonymous on October 9, 2009* -
## math

3. Determine which ordered pair is a solution of y = –5x + 10. (1 point) (–15, 5) (2, 0)++ (–1, –5) (3, 25)

*asked by dori on March 15, 2019* -
## chemistry

how do you get the percent of a solution that is 2.5 ml copper sulfate and 7.5 ml water?

*asked by Emma on December 15, 2009* -
## science

what is the solution of this answer: t1=883.33N t2=1533.3N

*asked by JL on August 27, 2018* -
## Math

Which equation does NOT have the set of all numbers as its solution? 1. |-x| = |x| 2. ||x|| = |x| 3. |-x| = -(-(-x)) 4. -(-x) = x I need help with this problem.

*asked by Misty on December 10, 2014* -
## chemistry

What is the pH of the solution created by combining 12.00 mL of the 0.10 M NaOH with 8.00 mL of the 0.10 M HC2H3O2?

*asked by need help please!!! on April 24, 2010* -
## Calculus

Determine whether the given orderd pair is a solution of the system ( -2, 1) X/3

*asked by Kelly on November 27, 2007* -
## Civics and Economics

what was the problem and solution in the Electoral College Compromise?

*asked by Tweety on September 14, 2010* -
## chemistry

Explain what a saturated solution is. Give a specific example.

*asked by kayla on August 4, 2008* -
## geometry

proportions i'm struggling on this problem x over x+8= x- 5 over x could someone please help me solve the solution

*asked by Anonymous on January 5, 2010* -
## chemistry

How many milliliters of a 0.50 M solution contain 14.0 g of BaCl2 (Barium Chloride)?

*asked by Emily on September 14, 2010* -
## Statistics

What would be an example with solution of the Poisson distribution in the frequency of repurchases?

*asked by Patte on May 21, 2018* -
## chemistry

How many grams of Al2(SO4)3 are there in 600 ml of (1.50)M solution

*asked by Anonymous on July 21, 2010* -
## math

describe a solution in which you would use more than one unit to measure length. tell why?

*asked by lerne on January 4, 2010* -
## Math

Does the term "one real solution" and "one root" mean the same thing

*asked by Anonymous on February 7, 2017* -
## maths

find series solution of the differential equation y"+3x^2y'-xy=0

*asked by Anonymous on June 25, 2015* -
## MATH

ADDING LITERS 1/2 , 3/4 AND 7/8 SOLUTION; 1/2=4/8, 3/4=6/8 AND 7/8 ANSWER? 14/8 PUZZLE!

*asked by SAMUEL on July 20, 2010* -
## algebra

Q: Determine whether -3.5 is a solution of the inequality. x greater than or equal to 6 A: No

*asked by Carmen on October 4, 2008* -
## algebra

Q: solve using the addition principle 2x + 6 > x + 16 the solution set is {x|x > ?} A: {x|x > 10}

*asked by Carmen on October 4, 2008* -
## algebra

solve using the multiplication principle -6x < -18 the solution set is {x|x ? ?} A: {x|x < 3}

*asked by Carmen on October 4, 2008* -
## math

Solve for x to the nearest hundreth for an algebraic solution. 2^(x-2)=54

*asked by Anonymous on January 17, 2011* -
## alg

solve and check solution 12x=11x-5

*asked by jerson on October 12, 2009* -
## Chemistry

Determine the pH of 263 ml of solution which has [NH 4I] = 0.300 M. Kb = 1.74 × 10-5 for NH3(aq)

*asked by Cait on April 14, 2011* -
## Math

I do not know how to do this problem can someone help me please. Thank you. Determine if the given ordered triple below is a solution. (3, 3, -5) x + 9y = 30 2x - 8y = -18 5y + 2z = 5

*asked by Erica on October 20, 2015* -
## Chemistry

Aluminum is an example of what? a-a compound b-a solution c-an element d-an alloy

*asked by Mary on July 23, 2010* -
## chemistry

How many moles of Kbr are there in 35.8ml of a 0.172M solution?

*asked by twynna on February 20, 2011* -
## chemistry

if i want to change the pH of any solution from 5 to 8 what the volume of NaOH 0.1 N needed

*asked by mohamed on March 9, 2011* -
## math

Write a proportion that is a different form of the following but will still yield the same solution: 3/4 = x/2

*asked by poo on December 13, 2009* -
## math

is each ordered pair a solution of the given system? write yes or no. y=6x+12 2x-y=4 (-4,-12)

*asked by Anonymous on April 25, 2010* -
## science

what is air? a compound, a mixture, a solution, or an amalgam

*asked by richard on October 9, 2009* -
## Algebra 2

what is the positive solution of the equation 5x^2 + 2x -16 =0? solve by factoring.

*asked by Zach on December 8, 2014* -
## Algebra

How would you solve y=2x+3 and y=2x-2 using elimination method. This is a no solution problem.

*asked by Jalen on May 5, 2016* -
## chem

how many ml of 0.15 m naoh solution are required to neutralize 35.00 ml of 0.22 m hcl

*asked by Anonymous on April 23, 2010* -
## calculus

Find the general solution of the equation. 6t*dy/dt+y=sqrt (t),t>0.

*asked by rebekah on June 27, 2016* -
## Math Help!!!

what is the solution to square root -75 to the nearest integer? 9******* 8 -8 -9

*asked by math help asap on November 21, 2014* -
## pre-calc

is x=15 degrees a solution of radical 3/3 cos2x+sin2x=0

*asked by larry on November 13, 2007* -
## algebra

Solve the inequality. Graph the solution set. 2r-9>-6

*asked by allexelle on April 10, 2015* -
## Algebra 2

what is the positive solution of the equation x^2 = 2x + 35? solve by factoring.

*asked by Zach on December 8, 2014* -
## algebra

missing coordinates of the ordered repair so its a solution 2 x + 4y - 6 = 0 (?,2) 2(2)+4y-6=0 4+4y-6=0 8y-6=0 6y=8

*asked by Felicia on June 14, 2016* -
## Math/ Algebra

Ms. Sue please I need help with these two problems! Tell whether the given number is a solution of each question 5b+1=16; -3 14=1/3x+5;27

*asked by Algebra Please Help Ms. Sue! on October 10, 2016* -
## analytical chemistry

why should EDTA solution be stored in polyethylene container?

*asked by lorraine on August 1, 2010* -
## Chemistry

How many g of sodium nitrate do I need to make one Liter of 15% m/v solution?

*asked by Monica on October 10, 2010* -
## chemistry

How would you prepare 250.0 ml of a 0.6 M aluminum sulfate solution

*asked by lyne on March 2, 2009* -
## Math

choose the correct solution and graph for the inequality. 3y-411 Y > - 5 or y < 2 Y < 5 or y > - 2*** Y < - 5 or y > 2 Y < - 5 or y > - 2 Thanks

*asked by Bubbles on October 19, 2015* -
## chemistry

How much water do you need to add to 10 mL of a solution of HCl with a pH of 3 to change the pH to 6?

*asked by Anonymous on March 6, 2011* -
## CHE103

describe the hazards you should be aware of when you use 2.0 M HCl solution

*asked by Abdul on April 13, 2011* -
## chemistry

you are right....I wrote it wrong. Does this mean that the solution will be more toward the redish side?

*asked by George on July 18, 2010* -
## adult education

How many grams of KOH would be necessary to make 200 mL of a 0.15 M solution?

*asked by debbie on April 23, 2010* -
## Algebra I

Fill in the compound inequality 4(x-6) 2(x-10) and 5(x + 2) >/ 2(x +8) with less than, greater than, at least, or at most so that the solution is only one value

*asked by Tonya on October 7, 2014* -
## 10th grade

why does Henry believe that compromise with the British is not a workable solution?

*asked by natalie on November 8, 2010* -
## chemistry

What mass of KOH is necessary to prepare 799.9 mL of a solution having a pH = 11.53?

*asked by AMANDIP on November 24, 2010* -
## Chemistry

A 1.50 M solution containing 25 Grams of Al(OH)3 would occupy what volume in liters?

*asked by Jacob on March 29, 2010* -
## Math

Solve the inquality and describe the solution set. y - 6 ≥ 12

*asked by Mystery Girl on February 24, 2016* -
## chemistry

describe how you would prepare 500mL of 0.25 M NaNO3 solution?

*asked by siti on July 4, 2015* -
## chemistry

How does the saturation of a solution affect crystal formation?

*asked by PLEASE help on September 14, 2017* -
## chemistry

How many mL of 0.3 M HCl(aq) are needed to neutralize a 60 mL solution of 0.15 M Ba(OH)2? THe answer please

*asked by mo on May 5, 2008* -
## math

Use the intermediate value theorem to verity that x^4+X-3=0 has a solution in the interval(1,2)

*asked by Anonymous on October 10, 2010* -
## Math

2x+5y=16 5x-2y=11 Please help me solve this system of equations!! I keep getting no solution and i do not know what I am doing wrong.

*asked by Gaby on January 6, 2010* -
## Math

X^3+5x-4=0 Show this equation has a solution between x=0 and x=1. (The question is two marks)

*asked by Winter on June 5, 2017* -
## physics

2.0kg of water at 0 degree celsius is to be changed into ice at this temperature. The same mass of water now at 100 degree celsius is to be changed into steam at this temperature. specific latent heat of fusion of water= 3.34 x10^5 J kg^-1. specific latent

*asked by Anonymous on February 26, 2018* -
## marketing

1.A store has fixed costs of 80,000 and an avarage gross margin of 26%. Variable expenses are estimated to be 6% of sales. a.calculate the break-even sales volume. b.calculate the profit/losses for sales of 300,000 I got the formulas: unit contribution=

*asked by bri on March 25, 2008* -
## statistics

Question2: When parking a car in a downtown parking lot, drivers pay according to the number of hours or fraction thereof. The probability distribution of the number of hours cars are parked is given below X 1 2 3 4 5 6 7 8 f(X) 0.30 0.24 0.17 0.10 0.08

*asked by s.Alhosani on December 11, 2011* -
## Organic Chem/ Calculate Yield

How would you calculate the percent yield for a reaction that began with 10 moles of acetone and 16 moles of benzaldehyde which yielded 6 moles of dibenzalacetone as the product? The molecular weights are as follows (acetone = 58.08 g/mole), (benzaldehyde

*asked by Steve on March 8, 2007* -
## statistics

You randomly choose 16 unfurnished one-bedroom apartments from a large number of advertisements in your local newspaper. You calculate that their mean monthly rent is $613 and their standard deviation is $96. Does this SRS give good reason to believe that

*asked by arshi on November 19, 2013* -
## Calculus 12th grade (double check my work please)

1.)Find dy/dx when y= Ln (sinh 2x) my answer >> 2coth 2x. 2.)Find dy/dx when sinh 3y=cos 2x A.-2 sin 2x B.-2 sin 2x / sinh 3y C.-2/3tan (2x/3y) D.-2sin2x / 3 cosh 3yz...>> my answer. 2).Find the derivative of y=cos(x^2) with respect to x. A.-sin (2x) B.-2x

*asked by anon on March 6, 2011* -
## Math

Calculate the total amount of mercury you ingest per day (i.e., divide your total mercury ingestion by 30 days), and then calculate the amount you ingest per your body weight per day (1 kg = 2.2 lbs. or 1 lb = 0.454 kg) 213.3 µg/g Hg/30day So far I have

*asked by Eboni on September 19, 2017* -
## compemtary math

. To determine the compound amount of an investment of $10,000 with an interest rate of 6% compounded monthly after 4 years requires you to use a table factor that goes beyond the Compound Interest Table. Calculate the new table factor for this investment.

*asked by mary on October 3, 2013* -
## Physics

Astrology, that unlikely and vague pseudoscience, makes much of the position of the planets at the moment of birth. The only known force a planet exerts on earth is gravitational. (a) Calculate the gravitational force exerted on a 4.00 kg baby by a 90 kg

*asked by Heather on November 19, 2017* -
## Chemistry

I have a few question about an equilibrium lab we performed. Approximately .1 g of CoCl2 * 6H2O was mixed with 2 mL of 12 M HCl. The solution turned blue. Then, water was added and stirred into the solution in 2 mL incriments until no further color change

*asked by Kim on May 29, 2007* -
## maths,science, physics

A block of mass 50kg was left to slide down a ramp elevated at an angle of 45 decrease as shown in the diagram below (assume g=9.8 ms^-2). I . Calculate the net force causing the block to slide down the ramp (assume no friction) II. Calculate the net force

*asked by Oxy on June 5, 2016* -
## Math

Use the data given below to answer the following questions 68, 63, 67, 66, 65, 87, 69, 61, 86, 82, 28 A. What is the outlier of the data? Explain WHY you consider this number the outlier. B. Calculate the mean of the given data set. You must show your work

*asked by Need Help on September 6, 2018* -
## Chemistry

We will calculate the amount of acid to use in each titration. Assume that you are using 0.0512 M NaOH(aq). A good volume of NaOH(aq) to use per titration is 15 mL. From this molarity and volume, the moles of NaOH can be calculated. Since the unknown acid

*asked by Erin on February 8, 2017* -
## CHEMISTRY

list three differences between molecular and ionic compounds, and explain how they relate to the differences in bond types.....how do i relate to the differences in bond types? List the differences and we'll talk about how they relate to the bond type. 1.

*asked by INEEDHELP!!! on December 6, 2006* -
## Economics

Help The answer i got is : GDP grew 10% GDP for 2006 using 2005 as the base year increase by 20% real GDP grow? 10% If i'm right, let me know, if not, please show Calculation Thank You Use the following data to answer questions 1-3 (be sure to provide all

*asked by Randy Johnson on December 1, 2008* -
## A2 Chemistry

This question is about the unnecessary production of carbon dioxide Outdoor flames, such as patio heaters and the Olympic flame, contribute to global warming. This is not only due to the heat released, but also due to the carbon dioxide produced from the

*asked by Chris on February 11, 2013* -
## physics

In the circuit below, at time t = 0, the switch is closed, causing the capacitors to charge. The voltage across the battery is 12 V The circuit: flickr. com/photos/ 68751220@N03 /6848519773/ A)Calculate the time constant for the RC circuit B)Calculate the

*asked by Dan on July 27, 2012* -
## Chemistry

Which of the following mixtures of KCl in water is a saturated solution and which is an unsaturated solution; 1)100g of KCl in 100mL of H2O at 40°C 2)50g of KCl in 100mL of H2O at 70°C 3) 120g of KCl in 100mL of H2O at 60°C My data is: Temperature82°C

*asked by Lori on February 19, 2013* -
## Algebra

1,Sovle using the substitution method. Show your work. If the system has no solution or an infinite number of solutions,state this. -x - 3y = -20 5x + 3y =40 2 Sovle using the elimination method. Show your work. If the system has no solution or an infinite

*asked by Destiny on September 18, 2011* -
## ALGEBRA HELP #3

The graph shows the functions f(x), p(x), and g(x): Graph of function g of x is y is equal to 1 plus the quantity 1.5 raised to the power of x. The straight line f of x joins ordered pairs negative 5, 3 and negative 3, negative 1 and is extended on both

*asked by Tony K on August 11, 2017* -
## devry

A small startup software developer company needs to create a program that will calculate the pay of its employees. For the third version of the program, the company wants the program to accept an employee’s name, the number of hours the employee worked,

*asked by pp on January 24, 2011* -
## Probability

Let X be a continuous random variable. We know that it takes values between 0 and 3, but we do not know its distribution or its mean and variance. We are interested in estimating the mean of X, which we denote by h. We will use 1.5 as a conservative value

*asked by A on April 23, 2014* -
## Chemistry

A 500g iron (Fe) rod was left in air for a long period of time, and got covered with rust (Fe2O3) as a result of reaction with atmospheric oxygen. The mass of the rusty rod was determined as 560g. a) calculate the theoretical yield of Fe2O3(s), that is the

*asked by Riley on March 18, 2012* -
## Chemistry

Determine the concentration of each type of ion in O.100M solutions of each of the following compounds. a. KBr b. Rb2S c. CuCl2 d. Mg(NO3)2 If someone could just even explain what they are asking for and how to do the problem, I would greatly appreciate

*asked by Anonymous on March 25, 2007* -
## physics

Two pucks collide on an air hockey table. Puck A has a mass of 17.0 g and is initially traveling in the +x direction at 7.00 m/s. Puck B has a mass of 51.0 g and is initially at rest. After the pucks collide, puck A moves away at an angle of 52.0 deg above

*asked by Tsion on March 24, 2014* -
## Algebra

Compare the future amounts (A) you would have if the money were invested at simple interest and if it were invested with annual compounding. $4,000 at 12% for 30 years (a) Calculate the future amount if the money were invested at simple interest. (b)

*asked by Sue Jackson on August 28, 2012* -
## Algebra

Compare the future amounts (A) you would have if the money were invested at simple interest and if it were invested with annual compounding. $3,000 at 11% for 20 years (a) Calculate the future amount if the money were invested at simple interest. $ (b)

*asked by shirley on May 28, 2012* -
## Physics

I'm supposed to to calculate an experimental value for the acceleration of gravity from the slope of an acceleration vs. delta mass graph... also i'm supposed to find the percent error (to the normal acceleration of gravity of 9.8).. the slope is .442 i'm

*asked by Amber on October 30, 2014* -
## physics

Two crates A and B connected together by a light rope are pulled along a factory floor by an applied force, F. Crate A has a mass of 50 kg and the coefficient of friction (μ) between crate A and the floor is 0,25. Crate B has a mass of 35 kg and μ

*asked by Nick on June 3, 2012* -
## Chemistry

I saw that article on Google - that is actually how I got the idea to sublimate the naphthalene. But thank you for the suggestion! It makes me feel much more confident to know that I am on the right track! Thank you! We have a lab where we have to separate

*asked by Summer on February 27, 2007* -
## Physic (Stress & Strain)

1) Calculate the tension stress in a 21.00mm diameter rod subjected to a pull of 30.000kN. 21mm =0.021m 30.000kN = 30000N A = pi*d^2/4 = 3.1416 * (0.021)^2m^2/ 4 = 3.1416 * 0.000441/ 4 = 0.0013854456/ 4 = 0.0003463614 Stress = Load/ Area = 30000/

*asked by Danny on June 23, 2013* -
## Physics (Stress & Strain)

1) Calculate the tension stress in a 21.00mm diameter rod subjected to a pull of 30.000kN. 21mm =0.021m 30.000kN = 30000N A = pi*d^2/4 = 3.1416 * (0.021)^2m^2/ 4 = 3.1416 * 0.000441/ 4 = 0.0013854456/ 4 = 0.0003463614 Stress = Load/ Area = 30000/

*asked by Danny on June 23, 2013* -
## Networking LANs

You have been contracted to build a network for a multimedia development firm that currently uses a 10-Mbps Ethernet network. The company requires a high-bandwidth network for the multimedia team, which constantly views and manipulates large files across

*asked by Beth on September 29, 2008* -
## science

Bill finds an unusual object and wishes to calculate it's density. He discovers a problem of accurately weighing it, because it won't stay on the weighing pan. To solve this he adds the object to a beaker containing 59 mL of distilled water and finds the

*asked by Arthur on August 18, 2009* -
## PHYSIC 220

A ferryboat transports tourists among three islands. It sails from the first island to the second island, 4.38 km away, in a direction 37.0° north of east. It then sails from the second island to the third island in a direction 76.5° west of north.

*asked by SFSU on February 12, 2016*

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