Monday

July 27, 2015

July 27, 2015

Total # Posts: 4,994

**Chemistry**

If you have a di or polyprotic buffer state below whether you see evidence of this in the form of your pH curve. If you do not see evidence of this, explain why this should be the case Wouldn't you see evidence of a di or polyprotic buffer if there are multiple ...
*August 13, 2013*

**physics**

A hot-air balloon is rising upward with a constant speed of 2.80 m/s. When the balloon is 9.48 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?
*August 13, 2013*

**chemistry**

I do mean spilled, thanks.
*August 7, 2013*

**chemistry**

That is excellent thank you. Now you have given me the answer working through it myself makes a lot more sense. Can you help me with the one below as well. A 25.0 mL solution of HCl has been spilt. It took 21.8 mL of saturated 2.5 M NaOH to neutralise the acid. What was the ...
*August 7, 2013*

**chemistry**

Can one calculate the number of moles of air? If so, calculate the number of moles in 1 kg of air (making sure your calculation, units and assumptions are fully explained); If not, explain why it is not possible to calculate the number of moles of air.
*August 7, 2013*

**chemistry**

A 25.0 mL solution of HCl has been spilt. It took 21.8 mL of saturated 2.5 M NaOH to neutralise the acid. What was the molar concentration of the acid?
*August 7, 2013*

**maths**

Determine the acute angle between the line passing through the points A(-2;1/5) and B(0;1) and the line passing through the points C(1;0) and D(-2;6)
*August 6, 2013*

**Physics**

Why is it highly unlikely to find an ion with a charge less than -4 or greater than +4? I need examples of different types of ions and evidence to support the logic using the concepts of ionization energy and electronegativity.
*August 6, 2013*

**Math**

during the warranty period, 6% of their computers are returned because they have defective keyboards, 5% are returned because they have defective disk drives, and 1% are returned because both the keyboard and the disk drive are defective. What is the probability that a ...
*July 27, 2013*

**math**

sorry,i 'm not understand the number 4,4,4 either
*July 27, 2013*

**math**

complete the pattern : 1/2 , 3/4 , 1 , 4 , 4 , 4
*July 27, 2013*

**math**

it's the right answers,that's why i cannot figure it out
*July 27, 2013*

**math**

the iceman found recently in a glacier was a first thought to be about 5300 years old.Roughly when did he have his 14th birthday?2700bc,300bc,3700bc,5300bc or 7300bc
*July 27, 2013*

**math**

i don't understand what is x of y alone ,
*July 27, 2013*

**math**

if a number x is 10%of y and z,and z is 3 times of y.What % is x of y alone? 1)3.3% 2)2.5% 3)5% 4)4%
*July 27, 2013*

**math**

complete the pattern:50,20,8,4,4,4.
*July 23, 2013*

**Spain History**

I'm doing a survey for my class to get opinions to see which side people favored the most, the Nationalists or the Republicans? I have interviewed the people I know but I'm still lacking.
*July 23, 2013*

**Spain History**

Which side would you support in the Spanish Civil War and Why?
*July 23, 2013*

**world geography**

Why are some bodies of water in Russia unnavigable for part of the year? They are frozen. They are too shallow. They are too swift. They contain chernozem.
*July 22, 2013*

**math**

would u please explain,thanks
*July 21, 2013*

**math**

a taut wire of length'w'emits a single note when plucked.if it were half as long it would emit the same note but one octave higher.how long should the same wire be to emit the same note but one octave lower?which gives the biggest answer?1)2.3x8 2)3.4x7 3)4.5x6 4)5.6x5...
*July 21, 2013*

**math**

in the number 0.123451234512345......(recurring)what is the 1992th digit after the decimal point
*July 21, 2013*

**math**

when tessa and fatima run a 100 metre race,tessa wins by 10m.then they repeat the race,this time with tessa starting 11m behind the starting line.if both girls run at the same speed as efore,what would be the expected result?
*July 21, 2013*

**Chemistry 3A**

An aqueous solution contains the ions B, C, and D that are in equilibrium with one another according to the reaction B (aq) + C (aq) ->/<- D (aq) A certain amount of water is added so as to double the volume of this solution, while keeping the temperature and the ...
*July 21, 2013*

**math**

A GARDEN places some lilies in a pond.he does this on the first day of the month of september.the lilies double in volume every day until on the last day of the month,the pool is full.on what day of the month was the pool half full of lilies?
*July 21, 2013*

**math**

thanks,but what is 3^2,is it 3time 2 or square root of 3
*July 20, 2013*

**math**

2 people start off to work directly away from each other.they each walk for 4 kms then turn directly to their right and walk for another 3 kms.how far apart are they
*July 20, 2013*

**math**

5 people measured a metal bar using the same measuing instrument,but each read the scale to a different level of accuracy.their 5 answers are show below.4 of them are correct(to the chosen level of accuracy),but one is not.which is the odd one out?1)244mm 2)243mm 3)243.7mm 4)...
*July 20, 2013*

**math**

a quiz has 25 questions with 4points awarded for each correct answer and 1 point deducted for each incorrect answer,with zero for each question omitted.John scores 77points.how many questions did he omit?
*July 20, 2013*

**math**

as a regular customer in my favourite restaurant,i get 10%discount.but to the cost of the meal must be +17.5%gstand 12%service charge.if the %are to be worked out in turn(which each%-addition or discount-being on the previous answer),which order of working leaves me the least ...
*July 20, 2013*

**math**

it takes 3weeks to build a large garage.if it takes 2/3 of a week to construct the frame and 5/4 of a week to put the roof on.how much time is spent on the rest of the construction?
*July 20, 2013*

**english**

“Boys don’t cook.” What type of rhetorical device or fallacy is this? :“…what are you doing in those overalls? You should be in a dress and camisole, young lady!” what type of rhetorical device or fallacy is this?
*July 19, 2013*

**english**

The older you grow the more of it you’ll see. The one place where a man ought to get a square deal is in a courtroom, be he any color of the rainbow, but people have a way of carrying their resentments right into a jury box. As you grow older, you’ll see white men ...
*July 19, 2013*

**english**

"There's four kinds of folks in the world. There's the ordinary kind, like us and the neighbours, there's the kind like the Cunningham's out in the woods, the kind like the Ewell's down at the dump, and the Negroes." what rhetorical device or ...
*July 19, 2013*

**english**

to kill a mockingbird movie analysis question. 1) how does the lack of eye contact show Mayella is lying? Why is she lying? How does this show racism?How is this significant to the film? analysis further toward the so what factor. Thanks
*July 18, 2013*

**psy**

suppose you wanted to do research on how best to gradually charge the behavior of a fearful child. Which of the following theorist are you likely to come across in your resarch
*July 15, 2013*

**Math**

Simplify the complex fraction: [(4/(x-5))+(2/(x+2))]/ [((2x)/(x^2-3x-10))+3]
*July 12, 2013*

**Social Studies**

It can be said that one of the greatest contributions of the Moors was religious tolerance. Do you believe that is true? If so, why is it then that some people view Muslim culture to be a culture of intolerance?
*July 10, 2013*

**math**

OMG I CAN NOT get this !!!! Purchase price of article = $495 Down payment = $50 Number of payments = 36 True annual interest rate = 18% Monthly payment amount = $ The formula is I= 2YC ________ M(N+1) y = the number of payments made in a year. m = the amount financed or how ...
*July 10, 2013*

**math**

When I worked this problem out I got the answer $250.80. It was graded wrong. Can you explain what I did wrong. A deposit of $8,000 at 9.5% for 120 days $
*July 10, 2013*

**math**

When I worked this problem out I got the answer $250.80. It was graded wrong. Can you explain what I did wrong. A deposit of $8,000 at 9.5% for 120 days $
*July 10, 2013*

**math**

Loan Amount: $15,000 Method of payment: discount basis Amount of Interest : $650 Term of loan: 1 year Effective Rate of Interest (to the nearest tenth): I tried to work this out but I got it completely WRONG !!
*July 10, 2013*

**Answered myself lol**

Never mind I worked this out myself
*July 10, 2013*

**math**

Number of dinners = 125 Individual portion = 8 oz. Size of can = 32 oz. Number of cans required = I got 31.25 buttt you can't have 31.25 cans lol !
*July 10, 2013*

**math**

Labor rate = $12 per hour Hours worked = 36 Overhead rate = 125% Retail price of good furnished = $185 Sales tax rate = 7% Total bill for services and parts = $ The answer that I got was 762.80. Can you check my answer.
*July 9, 2013*

**math**

For some reason the computer keeps saying my answer is wrong.
*July 9, 2013*

**math**

A sphere has a radius of 3.5 inches. Volume (to the nearest tenth) = cubic inches The answer that I got was 179.6. It is wrong ! i I miss a step?
*July 9, 2013*

**math**

12= 6in. 16= 8 in. 18= 9 in ! Thank you !
*July 9, 2013*

**math**

Suppose you want to represent a triangle with sides 12 feet, 16 feet, and 18 feet on a drawing where 1 inch = 2 feet. How long should the sides of the triangle be in inches? The sides of the triangle on the drawing should be inches, inches, and inches.
*July 9, 2013*

**math**

I hope I will too. Math isn't my strongest subject.
*July 9, 2013*

**math**

Sorry if I am on here a lot. I just nee a lot of help an I really have to pass this class .
*July 9, 2013*

**math**

Thank you.! I was a decimal point off !
*July 9, 2013*

**math**

Your station charges $16.50 for a lubrication job. As a promotion you sell six coupons for lubrication jobs for $90. What percentage discount are you offering for customers who purchase the 6-coupon lube book? Discount (to the nearest tenth) = % The answer I got was 9% & my ...
*July 9, 2013*

**math**

The total price of an article is $7.02, including tax. If the tax rate is 8%, what is the retail price of the article?
*July 9, 2013*

**math**

Purchase price of article = $3,000 Down payment = $0 Number of payments = 36 Monthly payment amount=$93.33 True Annual Interest (to the nearest tenth) = a0 %
*July 9, 2013*

**english**

what motivates us as writers and viewers to create and interact with characters through pieces of work such as " a beautiful mind" (movie. This is our essay question. what topic and 3 arguments could i talk about in my essay
*July 9, 2013*

**math**

Purchase price of article = $5,555 Down payment = $555 Number of payments = 42 True annual interest rate=18% Monthly Payment= $
*July 8, 2013*

**Math**

Loan Amount: $15,000 Method of payment: discount basis Amount of Interest : $650 Term of loan: 1 year Effective Rate of Interest (to the nearest tenth): %
*July 8, 2013*

**Math**

Is the price 549.95?
*July 8, 2013*

**Math**

It's all one whole question! Can you just tell me the steps to solve each one you do not have to tell me the answer! I just need to know how to get the answer so I will know how to do this problem again ..
*July 8, 2013*

**Math**

Tim Worker buys a new sofa for $549.95. He pays 20% down and takes an installment loan to complete the purchase. He makes 12 payments which include his principal and a $50.00 finance charge. What is the APR on his loan? The down payment is $ The amount financed is $ The ...
*July 8, 2013*

**probability**

A stock market analyst figures the probabilities that two related stocks, A and B, will go up in price. She finds the probability that A will go up to be 0.6 and the probability that both stocks will go up to be 0.4 What should be her estimate of the probability that stock B ...
*July 7, 2013*

**probability**

Assume that there is an urn containing seven $50 bills, six $20 bills, five $10 bills, four $5 bills, and one $1 bill and that the bills all have different serial numbers so that they can be distinguished from each other. A person reaches into the urn and withdraws one bill ...
*July 7, 2013*

**math**

there are 6 white balls and 4 black balls.i takeout 2 balls at random,one at a time,without replacement.What is the probability that the second ball i take is black
*July 6, 2013*

**math - help please**

Assume that 2 cards are drawn in succession and without replacement from a standard deck of 52 cards. Find the probability that the following occurs: the second card is a 9, given that the first card was a 9.
*July 6, 2013*

**probability**

For a family with 2 children, the sample space indicating boy (B) or girl (G) is BB, BG, GB, and GG. If each of the outcomes is equally likely, find the probability that the family has 2 girls, given that the first child is a girl.
*July 6, 2013*

**chemistry**

can you explain how to find the bond order of (σ1s)^2(σ1s*)^2(σ2s)^2(σ2s*)^2(σ2p)^2(π 2p)^4(π 2p*)^2... I know that Bond order = (number of bonding electrons - number of antibonding electrons)/2 but i have no idea what to do..
*July 3, 2013*

**Science**

How far will a ball travel in 4.2 s if a baseball thrower pitches ball at 43 ms-1? (make sure you have the correct units)Velocity (ms-1) = Distance (m) / Time (s)
*June 29, 2013*

**Math**

Find the area of a circle whose circumference measures 100 cm. Area (to the nearest square centimeter) = cm2 I plugged in everything C = 2 r C=2x3.14x100= 628 <<< The computer said it was WRONG ! Then, I tried C= 2X3.14X50= 314 !!! If I am wrong can you EXPLAIN to me ...
*June 28, 2013*

**Math**

Omg Thank you !! I now know how to solve this type of problem the correct way ! Thank you so much !
*June 28, 2013*

**Math**

How did you get 26.67?
*June 28, 2013*

**Math**

Compute the area of a triangle with a base of 15 cm and an altitude of 10.5 in. Area (to the nearest tenth) = cm2 I plugged everything into the area formula which is A = (1/2)bh . A=.5x15x10.5= I got 78.75 rounded 78.8. The computer keeps saying I am wrong. What am I doing ...
*June 28, 2013*

**Chemistry**

nevermind dr. bob i figured it out.. the volume was 25 mL
*June 27, 2013*

**Chemistry**

is it 404?
*June 27, 2013*

**Chemistry**

do you know what the molar mass is?
*June 27, 2013*

**Chemistry**

we needed to make the solution's concentration about 0.002 M.
*June 27, 2013*

**Chemistry**

we did 1 dilution and do you need to know how much water is added? I attempted the problem and the hint that was given said..."use the mass of iron nitrate and the volume of your final solution to determine the concentration of the final solution."
*June 27, 2013*

**Chemistry**

If you weigh out 2.083 g Fe(NO3)3·9H2O, what is the final concentration of the dilute Fe(NO3)3 solution that you make?
*June 27, 2013*

**Math**

17,977.5
*June 26, 2013*

**Math**

You are given the job of laying carpet for a six-story building. At each floor the dimensions of the floor are 75 meters in length by 40 meters in width. A stairwell takes up a space 2.5 m by 1.5 m, and cuts through each floor. If the rest of the floor area is to be carpeted, ...
*June 26, 2013*

**Math**

A cylinder has a radius of 2 feet and a height of 18 feet. Volume (to the nearest tenth) = a0 cubic feet i TRIED to work out this problem. The answer I got was 226.3 I used the cylinder volume formula which is π r2 h.! The computer says my answer is wrong. what am I doing...
*June 25, 2013*

**Math**

V = 4/3r3. A sphere has a radius of 4 inches. Volume (to the nearest tenth) = cubic inches The answer I got was 261.2 but it was wrong.
*June 25, 2013*

**physics**

a 17 kg sled is being pulled along the horizontal snow covered ground by a horizontal force of 22 N. starting from rest the sled attains a speed of 1.9 m/s in 7.8 m find the coefficient of kinetic fiction between the runners of the sled and the snow.
*June 25, 2013*

**English**

Okay, thank you so much!
*June 24, 2013*

**Math**

I need help with this I keep putting the numbers in wrong on the formula ! PLEASE HELP Price of article = $315.50 Down payment = $31.55 Monthly payment amount = $16.50 Duration of payments = 20 months True annual interest rate to the nearest tenth = % Formula: I(Interest)= 2YC...
*June 24, 2013*

**Math**

formula
*June 24, 2013*

**Math**

Weird lol Well this is the formula I= 2yc/m(n+1) y = payments per year; c = total interest paid; m = amount financed; n = total number of payments. I do not know how to plug the numbers in right with this equation.
*June 24, 2013*

**Math**

I got 4.72& the computer says the answer was wrong.
*June 24, 2013*

**Math**

Your service contract for washer repair maintenance is offered at $48 per year. If a customer wants to pay it off in equal monthly installments for one year and if the true annual interest charge is 18%, what should his monthly payment be?
*June 24, 2013*

**math**

Your service contract for washer repair maintenance is offered at $48 per year. If a customer wants to pay it off in equal monthly installments for one year and if the true annual interest charge is 18%, what should his monthly payment be?
*June 23, 2013*

**Math**

Price of article = $315.50 Down payment = $31.55 Monthly payment amount = $16.50 Duration of payments = 20 months True annual interest rate to the nearest tenth= %
*June 23, 2013*

**Chemistry**

So would it be (3)(.750)/13? .1731 would be the answer?
*June 21, 2013*

**Chemistry**

Consider this molecular-level representation of a gas. 5 orange 6 green---> 3 pairs 6 blue If the partial pressure of a diatomic gas is .750 atm, what is the total pressure?
*June 21, 2013*

**Math**

Weights of the vegetables in a field are normally distributed. From a sample Carl Cornfield determines the mean weight of a box of vegetables to be 180 oz. with a standard deviation of 8 oz. He wonders what percent of the vegetable boxes he has grouped for sale will have a ...
*June 19, 2013*

**Math**

Weights of the vegetables in a field are normally distributed. From a sample Carl Cornfield determines the mean weight of a box of vegetables to be 180 oz. with a standard deviation of 8 oz. He wonders what percent of the vegetable boxes he has grouped for sale will have a ...
*June 18, 2013*

**math**

Express your answer as a decimal (to the nearest hundredth). What part of an hour is 40 minutes?
*June 18, 2013*

**math**

On Team B 80% of the football players weigh more than 200 pounds. If 41 men are on the team, how many weigh more than 200 pounds?
*June 18, 2013*

**English Composition II**

The practical context of an e-mail includes all of the following EXCEPT:
*June 4, 2013*

**Math**

The mass of a jar of beans is 525 g. If the jar has a mass of 25 g, the beans alone must have a mass of:
*June 4, 2013*