Friday
August 1, 2014

Posts by Chris


Total # Posts: 2,149

Chemistry
Calculate the pH of 7.2 × 10-8 M HCl. Report your answer to the hundredths place. Next, What fraction of the total H in this solution is from the HCl? Report your answer to the hundredths place. I apologize for the re-post, but I felt the previous one was labeled incorre...

Analytical
I apologize, I saw my mistake, and used HCL (7.2E-8)/(Total) and got: 51.245% This answer is still wrong, so now I am thoroughly confused.

Analytical
Thank you very much for the reply. I was able to solve for X (X = 7.03E-8), which I added to that of HCl (Total = 1.405E-7) and was able to obtain the pH (6.85, assume this answer is deemed correct). Here is my problem: I took the (H^+) from HCL (X?) and divided it by the (Tot...

Analytical
Calculate the pH of 7.2 × 10-8 M HCl. Report your answer to the hundredths place. Next, What fraction of the total H in this solution is from the HCl? Report your answer to the hundredths place.

algebra
Your salary after a 3% salary increase if your salary before the increase was S, what is the algebric expression?

Chemistry
How to do significant values in Chemistry? I am totally stuck; I have no idea what to do? My teacher gave me C due to the significant value error. Please help

math
Many thanks!!!

math
an urn contains 3 blue chips and 7 red chips. sequentially draw 3 chips without replacement. what is the probability that all drawn chips will not be the same color?

statistics
an urn contains 3 blue chips and 7 red chips. sequentially draw 3 chips without replacement. what is the probability that all drawn chips will not be the same color?

Algebra 1
-2 - radical bar 5 over radical bar 10 simplify

Algebra 1
N/5-9=1/5

math
i mande 440 at a yard sell in 10 20 i need to have 5 more 10 than 20

algebra 2
y varies directly with x. When y = 20, x = 50. Find x when y = 36.

Math Stats
Chris is shopping for CDs and decides to purchase 3 movie soundtracks. The store has 9 different movie sountracks in stock. How many different selections of movie sountracks are possible?

math
1/3 + 5/6 = 7/6 7/6 + 3/8 = 37/24 37/24 = 1 13/24 or approx 1.5417

health
2. ________ in the pancreatic islets secrete the hormone insulin in response to a high concentration of glucose in the blood. A. Beta cells B. Alpha cells C. Gamma cells D. Sigma cells i put b but it said it was wrong

Physics
. The cheetah is the fastest running animal in the world. Cheetahs can accelerate to a speed of 20 m/s in 2.5 an can continue to accelerate to reach a stop speed of 29 m/s. Assume the acceleration is constant until the stop speed is reached and is zero thereafter. (a) Express ...

math
Ling bought 5 dishes and 9 glasses for $25.50. Each glass cost 50¢ cents more than each dish. How much did Ling spend the glasses

trig
I think you mean find all angles theta between 0 and 2pi.

math
What is 77 percent round to nearest tenth of a degcree

writing
Can someone check my answers for me? True or False... 1. TRUE you should use a comma before the word “and.” 2. FALSE The following is a sentence fragment: It no longer flies. 3. TRUE In the following sentence, the ()'d word is used correctly: The (Jones’) co...

Chemistry
prepare some 0.1 HCl by diluting the appropriate volume of stock 'conc' HCl to 1L. The stock acid is 37.4% HCl by weight and has a density of 1.19g/mL . Measure out the required volume with a graduated clyinder

Physics
In a stunt for an action movie, the 100 kg actor jumps from a train which is crossing a river bridge. On the river below, the heroine is tied to a raft floating towards a waterfall at 3 m s−1. The raft and heroine have a total mass of 200 kg. a If the hero times his jump...

Math
What is 3/4 exivalent to? And 0.9 is exivalent to?(:

Math
5/6 is exivalent to? 0.85 is exivalent to? 3/4 is exivalent to? And 0.9 is exivalent to?

science
what are the number of digits in a measurement that are known with a certain degree of reliability?

Geometry
Use the figure below in which ec bisects ad at c. Find the value of x and the measure of the indicated segment.

Calculus
An open top box is made by cutting congruent squares from the corners of a 12 inch by 9 inch sheet of cardboard and then folding the sides up to create the box. What are the dimensions of the box which contains the largest volume?

Algebra 1
when the cost of a car is multiplied by 0.07 the results is $1710. Find the cost of the car.

math
2x^2+18x-20=0

Math (Geometry)
What is the midpoint of line BC with B (2,0) and C (-4,6)?

finance
A manufacturing company issues a bond with a 100,000 face value and a coupon rate of 7%. If the bond has a life of 30 years, pays annual coupons, and the yield to maturity is 6.8%, what percentage of the bond's price is the present value of the face value?

chemistry
How is overall molecular polarity affected by molecular symmetry (specifically shown for alkenes in book)? And what are the consequences for melting and boiling points (in cases of high molecular symmetry versus low molecular symmetry)? I looked for help in the book but it did...

chemistry
What is high molecular symmetry and low molecular symmetry and give examples of both please help!!!

healthcare
what is the effects of hippa and other regulations on the use of these media for health care communication?

organic chemisrtry
What is a stretch (symmetric versus asymmetric)? What is a bend? ionterpreting infrared spectra NEED HELP PLEASE!!!!!!!!!!!!!!

organic chemisrtry
What must a molecule possess to be able to absorb radiation in the infra-red region?

organic chemisrtry
How do melting points differ for ionic compounds versus those that contain only covalent bonds? Why is this so (explain)?

organic chemisrtry
What is high molecular symmetry and low molecular symmetry and give examples of both please

organic chemistry
How is overall molecular polarity affected by molecular symmetry (specifically shown for alkenes in book)? And what are the consequences for melting and boiling points (in cases of high molecular symmetry versus low molecular symmetry)?

Math
a rare truffle once sold for 13 dollars and 20 cents for a 0.44 ounce can how much would 1 a pound be

Math
I am having trouble figuring out this question: My quotient is 1 more than 30/5. My remainder is 2. What division sentence am I?

health
Mean intake of seafood in the United States is approximately 3- 1/2 ounces per week, and increased intake is? A. Not advised B. Believed to cause harm C. Not likely to help or harm D. Recommended i think c

help please
thank you

help please
i think its d

help please
Which age groups benefit from physical activity? A. Children B. Middle aged adults C. Older adults D. All of the above

help please
d

help please
By making smart food choices, you can help protect yourself from: A. Accidents B. Bone loss C. Type 2 Diabetes D. Both B and C

health
it is c

health
What types of food can saturated fats be found in? A. Lima beans B. Whole milk C. Seafood D. Potatoes I got A what do you think

Algebra
;p

Pre algebra math
How do I do 21 - y, explain

Math
HELP?! 1.-9^2 2.(5x^9y)(-2x^-2y^-3) 3.(a^1b^-2) / (a^-2b^4) 4.(7x^-1/y^4)^-2 Scientific notation: 5) .0000745 Decimal Form: 6) 9.3*10^6 Solve: 7.3√-27 8.√(-5a)^2 Simplify: 9.√60x^5y^2 10.√75x^3 / √3x

Algebra2
So if the absolute vale equals a negative number there is no solution? Such as: |x^2+2x+1|=-4 So, that has no solution?

Algebra2
Making Sure these are right? absolute value: 1.|7x+2|=10 x=1.1 x=1.7 2.|3x-5|=-1 x=1.3 x=2

Law
The Jones Act, as the Merchant Marine Act was passed to support a strong national merchant marine, requiring that ships transporting goods on U.S. territorial waters to be built, owned and operated by U.S companies. The majority of the crew also must consist of U.S. citizens. ...

reading
the answer is captions

reading
is it captions

reading
the table of contents is the thing you read that shows you what page to turn to of witch chapter.

reading
subheads and table of contents

reading
I think its b but not sure.

reading
In order to get an idea of significant subject areas in a chapter, it is best to read the: A. subheads. B. graphics. C. captions. D. table of contents.

reading
When is the best time to read review the discussion questions? A. Immediately after you have finished all of the reading. B. After you write your notes. C. Before you begin any detailed reading. D. At least 1 hour after your detailed reading.

math
i used a calculator and the answer is b.

chemistry
if the pressure of 1.50L of hydrogen gas at 100 degrees celsius decreases from .500atm to .115atm,what is the final volume. assume temp remains the same

college physics
A 565 N mountain climber moves across a rope strung across a canyon. When she is more than halfway across, she notices the rope makes a 10.0 degree angle (from horizontal) behind her and a 25.0 degree angle (from horizontal) ahead of her. What are the tensions in the rope in f...

Chemistry
302.4 grams

Chemistry
You need to make 4200 mL of 0.450 M CuSO4. How many grams of CuSO4 do you need?

spanish
never mind figuerd it out

spanish
when will i get the answer?

spanish
1.También tengo mi propio auto. 2. Me llamo Mario Verdejo. 3. Soy el mejor chofer de Santiago. 4. Mi nuevo cliente se llama Jaime Talavera y es de los Estados Unidos. 5.Mañana vamos al Valle de Maipo. can some one help me put this in order cant seem to figure it ...

ENGLISH
Does the phrase "frozen to the spot" means: I couldn't move because of fear?

ENGLISH
Yea sorry typo .. I think it's A because B and C are personification and D is referring to a man and it didn't say what kind of figure it was.

ENGLISH
The phrase "my eye caught the shadow means" : A. I saw the shadow out of the corner B. My eye went and grabbed hold of a shadow C. The shadow grabbed my eye D. I saw a man standing at my side

Physics help
A wave is described by the equation y = (4.5×10−2) sin (1.9x − 3.2t), where lengths are measured in meters and time in seconds. What is the displacement of a particle at position x = 2.7 m at time t = 5.8 s? Note: Remember that the argument of the sine functi...

Physics!
The figure shows a uniform disk with a circular hole cut out of it. The disk has a radius of 4.00 m. The hole's center is at 2.00 m, and its radius is 1.00 m. What is the x-coordinate of the center of gravity of the system? The center of the disk is (0,0) The center of the...

Physics
A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? In rad.

physics help please
A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement?

Physics
A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? Help me get this answer please.

finance
You have finally saved 10,000 and are ready to make your first investment. You have the three following alternatives for investing that money: 1) Captial cities ABC Inc. bonds with a par value of $1000 that pays an 8.75 percent on its par value in interest, sells for $1.34 and...

business finance
Her are the data on $1000 par value bonds issued by Microsoft, Ford, and Xerox at the end of 2008, Assume you are thinking about buying these bonds as of January 2009. Answer the following questions. a. Calculate the values of the bonds if your required rates of return are as ...

nutrition
What personal boundaries would be establish in a nutrition seminar session?

chemistry/check please
-Hydrogen is the lowest density solid 2.which element has the highest? Osmium

chemistry
In solid form, what element has the lowest density? Which has the highest density? -Hydrogen is the lowest density solid 2.which element has the highest? can you help?

chemistry/help
In solid form, what element has the lowest density? Which has the highest density? -Hydrogen is the lowest density solid 2.which element has the highest? can you help?

chemistry/help
In solid form, what element has the lowest density? Which has the highest density? 1. Hydrogen is the lowest density solid 2.which element has the highest?

chemistry / help please
What is the name of: ZnNO3, of (NH4)2O, of Rb3PO4, or NH4ClO4?

PHYSICS
An applied force accelerates a 50-kg crate along a frictionless floor from rest to 5 m/s.The work performed by this force is most nearly 125 J 250 J(x) 500 J 625 J 1,250 J Can someone please explain this to me and help? I thought it was 250 J but my calculation was wrong.

world history
Why did Queen Mary imprison her half -sister Elizabeth? a-She had converted to Calvinism b- She had led an uprising c- She was beautiful d- She was popular and protestant answer: D correct?

learing
D.

chemistry
the chemical substance called flavin (an anthocyanin) is it write?

chemistry
What chemical substance is in red cabbage which serves as an indicator for acids and bases?

world history
Can you tell me 3 ways that the conclusion of WW1 leads into directly into WW2? thank you.

PHYSICS PLEASE HELP
A particle travels counterclockwise around the origin at constant speed in a circular path that has a diameter of 2.50 m, going around twice per second. Point Q is on the path halfway between points P and R, which lie on the x axis and the y axis, respectively. State the follo...

algebra
In a canoe race, a team paddles downstream 480 m. in 60 s. The same team travels up stream in 80 s. Find the team's rate in still water and the rate of the current. Please show how the equation is set up to solve

algebra
A jet travels at a rate of 798 mi/hr. with the wind. Going against the wind, the jet travels at a rate of 762 mi/hr. What is the rate of the jet in still air and the the rate of the wind? please show how the equation should be set up

ALGEBRA
Jim paddles a canoe upstream at a rate o 3mi/hr. Traveling downstream, he travels at 8 mi/hr. What is his rate in still water and what is the rate of the current? PLEASE SHOW THE SOLUTION EQUATION

math
5/10=3/5

Physics :)
The vector F is (12.0, −3.00) in rectangular notation. What is this same vector in polar notation? Express the angle as a positive number between 0° and 360°. I got 12.4, just can't get the angle.

spanish/help pleaseeeee
1-trabajaba 2- iban 3-teniamos 4- era 5-cuidaban 6- jugaba 7- nos divertiamos. complete the paragragraph. Cuando yo------ chica,mi vida era muy diferente.Yo nunca----,solo-------con mis amigos. Mis padres-----al trabajo y mis abuelos me-----.Nosostros no -----un televisor, por...

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