Wednesday

November 25, 2015
Total # Posts: 312

**Chemistry**

How do I calculate the amount of grams of Na2HPO4 and NaH2PO4 to prepare 200 mL of a buffer with an 8.25 pH so the sum of the concentrations of HPO4 and H2PO4 ions is 0.5 M? Does this involve writing a Ka expression and equilibrium? I am confused and Thanks for your help!
*March 11, 2012*

**chemistry**

This is a verbatim question on my final review for 2nd quarter College General Chemistry and it didn't make any sense to me so that is why I decided to post and ask for assistance. You not knowing either doesn't make me feel any more confident in my ability to pass ...
*March 4, 2012*

**chemistry**

How many grams of water are required to dissolve 27.8g of NH4(NO3)(MM=80.05 g/mol)to make a 0.500M solution?
*March 4, 2012*

**Math**

oh, ok thanks!
*February 15, 2012*

**Math**

Ok so you're supposed to solve the system by method of substitution. And the problem is: -2/3x + y = 2 2x - 3y = 6 So i put y= 2/3x into the second equation which looks like: 2x - 3(2/3x + 2) = 6 and then 2x-2x-6=6 So like everything cancels out? So then what do you put as...
*February 15, 2012*

**Chemistry**

If 25 grams of CoCl2•H2O,2 being the subscript of cl and the h, was heated to constant weight. What mass of anhydrous salt would remain?
*February 14, 2012*

**literacy**

When choosing your search strategy for a search engine, it's best to
*January 16, 2012*

**Chemistry**

This is a lab I have, but have no clue what to do. Please do out the steps so i can understand. Reactions and Data: NaOH(s)--> Na1+(aq)+ OH1-(aq) (Heat of solution of NaOH) This reaction involves adding solid NaOH to water and watching the temperature change as it dissolves...
*December 31, 2011*

**Chemistry**

For the following reaction: 6ClO2 (g) + 3H2O (l) = 5HClO3 (l) + HCl (g) If a chemist wants to make 55.0 g of HCl, how much ClO2 is needed?
*November 14, 2011*

**Chemistry**

For the following Reaction: 2AgNO3 + CaBr2 = 2AgBr + CaN2O6 If a chemist starts with 12.0g AgNO3, how many grams of CaBr2 must be added to use up all of the AgNO3?
*November 14, 2011*

**Chemistry**

For the following reaction: Al2(SO4)3 + 6NaOH = 2Al(OH)3 + 3Na2SO4 How many moles of Na2SO4 can be made with 3.2 moles of NaOH and excess Al2(SO4)3?
*November 14, 2011*

**Chemistry**

In the reaction between aluminum and hydrochloric acid, how many moles of hydrogen gas would be liberated when 3.612E-2 grams of aluminum are treated with excess hydrochloric acid? Moles of hydrogen gas liberated = mol The atmospheric pressure was measured to be 0.9666 atm and...
*November 5, 2011*

**Chemistry**

In the reaction between aluminum and hydrochloric acid, how many moles of hydrogen gas would be liberated when 3.612E-2 grams of aluminum are treated with excess hydrochloric acid? Moles of hydrogen gas liberated = mol The atmospheric pressure was measured to be 0.9666 atm and...
*November 4, 2011*

**Math **

Mr.Santiago brought 10 crates of oranges. There were 50 oranges in each crates. He sold 65% of them. 8% of the remainder went bad, and he threw them away. A) How much money did Mr.Santiago earn if he sold the oranges 5 for $1.20 B) If he made $24.15 by selling the rest of the ...
*October 28, 2011*

**social studies**

Forecasts of economists have.....1. overestimated inflation 2. underestimated inflation 3. generally been accurate on inflation 4. been less accurate than forecasts of economic growth 5. been as accurate as those for economic growth
*October 27, 2011*

**Chemistry**

In one experiment, the mass of water is 92.6 grams, the initial temperature of the water is 67.6oC, the mass of liquid nitrogen added to the water is 61.4 grams, and the final temperature of the water, after the liquid nitrogen has vaporized, is 35.6oC. Specific heat of water...
*October 13, 2011*

**Chemistry**

Ethanol (C2H5OH) boils at a temperature of 78.3oC. What amount of energy, in joules, is necessary to heat to boiling and then completely vaporize a 13.1 g sample of ethanol initially at a temperature of 11.1oC. The specific heat of ethanol is approximately constant at 2.44 JK-...
*October 6, 2011*

**Composition and communication **

Using the internet, find two examples of what you consider biased writing about the effect of videogames on children?
*August 28, 2011*

**HISTORY **

What are the main differences between the Shiites and the Sunnis?
*July 30, 2011*

**Media influences on American Culture**

I just need to know how to start a final paper on a culturally influential,on television show, movie, song or website
*July 30, 2011*

**Media Influences on American Culture**

How do i go about doing this assignment. Thats not what i wnated you to do. I was trying to tell you what i needed to do
*July 4, 2011*

**Media Influences on American Culture**

Take the role of Director of marketing for WhizBang Games as it evaluates various forms of Social media in helping to create a "buzz" around the latest game, Master Dynasty; a social game
*July 4, 2011*

**composition and communication1**

I think the feedback from writepoint was very helpful to me because it explains to me what i did wrong and how to fix your mistakes. It also tell you where to put correct punctuation. One mistake that i have learned is to write out the number under 1o. Dont use to much ...
*June 27, 2011*

**composition and communication1**

Can somebody please help me write 150 words on feedback from writpoint I"ve got this so far I think the feedback from writpoint was very helpful to me because it explains to me what i did wrong and how to fix my mistakes. It also tells where to put correct punctuation.
*June 27, 2011*

**composition and communication 1**

Can you help me on the writing elements please
*June 26, 2011*

**composition and communication 1**

I think number 1 is effective because everyone needs to have a will before they die. If you dont have a will nobody gets your stuff. And #3 because people now days are being denied credit all the time.For too many reasons
*June 26, 2011*

**composition and communication 1**

Heres #1 a lot of people dont have wills. Everyone needs a will, but not all people have one. Wills are important because they explain who gets your stuff ater you die. you dont wnat your things going to someone you dont want them to go to. My Aunt Martha went to a lawyer to ...
*June 26, 2011*

**composition and communication 1**

maybe im not understanding it
*June 26, 2011*

**composition and communication 1**

because the other paragraphs talk about wills and credit scores and avoiding and managing debts
*June 26, 2011*

**composition and communication 1**

yes its more effective do to the situation of the ecomomy we are in today. The paragraph should include more information on how someone is drnied credit
*June 26, 2011*

**composition and communication 1**

they is 5 paragraphs but im suppose to identify which 2 paragraphs was more effective, focusing on the writing elements rather than the opinions presentes. i didnt want to have to type all 5 paragraphs
*June 26, 2011*

**composition and communication 1**

Indiviuals can be denied credit for a number of reasons, Individuals who are near limit on existing cards, have to much outstandind debt or too many accounts overall, have a history of a late payments, charge off or bankruptucy are likely to be denied credit. Individuals ...
*June 26, 2011*

**composition and communication 1**

please if anyone can help me on this assignment. That would be so awsome. I have to identify which of the two selected pharagraphs was more effective, focusing on the writing elements rather than the opinions presented
*June 26, 2011*

**Pre Algebra**

I am doing an ice cream cone project for math on cones and had to figure out the surface area for them, but there is a question that is "how to the surface and lateral area of each relate?" my teacher said you will see a pattern but i dont. i.e. sa= 13,293.5 and la= ...
*May 10, 2011*

**math**

Gillen has 30 vehicles, some are bicylces and some are cars. These vehicles have a total of 88 wheels. How many bicycles would there be?
*April 25, 2011*

**chemistry**

given the reaction 4NH3 + 3O2 =2N2 + 6H20 how many moles of N2 would form if 2.77 moles of NH3 reacted completely?
*April 3, 2011*

**chemistry**

given the reaction 4NH3 + 3O2 =2N2 + 6H20 how many moles of N2 would form if 2.77 moles of NH3 reacted completely?
*April 3, 2011*

**english**

It’s time for a road trip! You are going to a major concert festival in another state and have found a lift there on a ride board through the concert web site. There are three other people sharing the ride with you, each from a different background and with a different ...
*April 2, 2011*

**english**

i have already tried those links i have been searching the internet everywhere and havent found very much thanks though!
*March 6, 2011*

**english**

i need help with this english essay i'm writing. I need help finding some pathos, ethos, and logos for the book lord of the flies.
*March 6, 2011*

**Math**

Find the exact number of cubes measuring 3 Cm. on an edge that will fill a box shaped like a rectangular prism that measure 24 cm by 18 cm by 9 cm
*March 3, 2011*

**Physics**

Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 66 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall.
*February 27, 2011*

**english**

prosective of a paragragh
*February 16, 2011*

**Calculus**

Does f(x)= 1 + cos(x), have an inverse or not, if so, what is the inverse? please explain.
*February 15, 2011*

**statistics**

A sample of n=5 scores has a mean 50. Another sample has n=10 scores and a mean of 60. If the two samples are combined, will the combined sample mean be greater than 55
*February 9, 2011*

**writting**

In Stephen Kings essay "Why We Crave Horror" what are some hasty generalizations, facalies, and use of logos?
*January 25, 2011*

**statistics**

The average age of evening students at a local college has been 21. A sample of 19 students was selected in order to determine whether the average age of students had increased. The average age of the students in the sample was 23 with a standard deviation of 3.5. Determine ...
*January 4, 2011*

**PLEASE HELP Chem**

Please tell me if these are right. 1.According to Le Chatelier’s principle, what is the effect on the products when N2 is added to the equilibrium mixture of each of the following reactions? a. 2NH3(g) < = > 3H2(g) + N2(g) B. N2(g) + O2(g) <= > 2NO(g) C. 2NO2(...
*December 7, 2010*

**Chem**

Please tell me if these are right. 1.According to Le Chatelier’s principle, what is the effect on the products when N2 is added to the equilibrium mixture of each of the following reactions? a. 2NH3(g) < = > 3H2(g) + N2(g) B. N2(g) + O2(g) <= > 2NO(g) C. 2NO2(...
*December 6, 2010*

**sociology**

Yep it's now 2013 & I have the same assignment in week7 & I am confused on it as well. :(
*December 3, 2010*

**Chem**

could you tell me if these are right and help me with the other 2 I cant seem to get them to come out. Calculate the pH of each solution given the following [H3O+] or [OH -] values. (a) [H3O+] = 1.5 10-8 M 1.0E-7 is what I got (b) [H3O+] = 5.3 10-6 M (c) [OH -] = 4.8 10-2 M I ...
*December 1, 2010*

**Chemistry**

I was just wanting to make sure I did these right. How many grams of solute are in each of the following solutions? a.) 2.5 L of 3.0 M Al(NO3)3 solution. for this one I get 1600 g of Al(NO3)3 b.) 75 ml of 0.5 M C6H12O6 solution. and for this one I get 6.8g of C6 H12 O6 How ...
*November 29, 2010*

**math axis of symmety**

What is the equation of the axis of symmetry of the graph with the order pairs of (-2,0) and (6,0). How would I do this since? I thought perhaps I could do -2+__=6 which would be 8 then 8/2 =4 so x=4 my brother says I'm suppose to do 6-2=4/2=2 so x=2 who's right or are...
*October 23, 2010*

**phys**

-.8m/s
*October 18, 2010*

**poetry**

What is the secret to reading someone with words?
*October 12, 2010*

**ethics and society**

so what needs to be done to correct this problem
*October 12, 2010*

**ethics and society**

i think it is an escape route for those who are elected
*October 12, 2010*

**ethics and society**

Are the accountability systems put in place within our public service agencies working best as an escape route for those elected to govern the agency or as a tool of transparency for the interest of the people who elected them?
*October 12, 2010*

**economics**

if land suitable for growing corn is also suitable for growing soybeans, the discovery that soybean oil prevents cancer will A.have no effect on the cost of growing corn B.reduce the cost of growing corn C.raise the cost of growing corn D.decrease the demand for corn is the ...
*October 11, 2010*

**college**

It is stand accounting procedures, or GAAP, to make an adjusting entry to remove the current year’s principle from the long-term liabilities. This entry reduces the long-term liabilities and increases the current liabilities. You are the bookkeeper for Biker’s ...
*September 25, 2010*

**MAth**

explain how children's concepts of partitioning need to be refined to produce a concept of fractional parts
*September 14, 2010*

**precalculus 2**

log(x-4)-log(3x-10)=log(1/x)
*September 12, 2010*

**ECONOMICS**

supporting details for "is economic equality possible and would it be socially just?"
*September 10, 2010*

**Economics**

yes i knew it wasnt possible but i need some reasons like poor and rich people and like supporting reasons. i just dont know how to word it
*September 9, 2010*

**Economics**

poeple have the same income per year or total wealth. wealth meaning the value of all the assets a person owns.
*September 9, 2010*

**Economics**

is economic equality possible and would it be socially just?
*September 9, 2010*

**math**

if a set of index cards are labeled with the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. one card is drawn, find the probability that it is an even number
*July 14, 2010*

**Economics**

Numerous times is history, the courts have issued consent decrees requiring large companies to break up into smaller competing companies for violating the antitrust laws, The two best known examples are American telephone and telegraph (AT&T) in the 1980s and Microsoft 20 ...
*July 14, 2010*

**economics**

The Federal Reserve board of governors has power to raise or lower short-term interest rates. Between 2005 and 2006, he fed aggressively increased the benchmark federal funds interest rate from 2.5 percent in February 2005 to 2.5 percent in June 2006. Assuming that other ...
*July 13, 2010*

**Math**

Im still confused about how you got from x=4 to (4, -8)?
*May 13, 2010*

**Math**

Find 3 coordinates on the circle when the center of the circle is (4, -3) and the radius is 5 Help me!!! Thank you :)
*May 13, 2010*

**science**

when you use a graph to solve a problem about how far a car traveled during a specified time during which it was accelerating how many area calculations do you have to make? what is/ are the shape/shapes you are calculating? a. one area calculation, a rectangle b. one area ...
*May 12, 2010*

**Algebra**

Find the center and radius of the circle. Equation: x^2 + (y+7)^2=4 Formula for center at the origin is x^2+y^2=r^2 Is this what I use and how do I go about this?
*April 18, 2010*

**Algebra**

Find the center and radius of the circle. x^2+(y+7)^2=4 I know that the formula for the center at the origin x^2+y^2=r^2 Very lost. Need Help!
*April 18, 2010*

**Algebra**

Thanks!!
*April 18, 2010*

**Algebra**

Write an equation of the line satisfying the given conditions. Parallel to the line y=-5x-6 and a y-intercept of -2. Would it be: y=-5x-2 The slope stays the same due to it being parallel and the only thing that changes is the y-intercept and that would be the -2. Am I correct?
*April 18, 2010*

**Algebra**

Okay. I had went ahead and done this. I found out that a negative slope the line goes down left to right and a positive slope got up left to right. Thanks for the help.
*April 18, 2010*

**Algebra**

I am having to graph this linear equation. y=-2x+4 This is what I know. The y-intercept is 4 and the slope is -2. So I would start at the y-axis at 4, then would I go down 2 units and over to left one or go up 2 units and to the right one. Dont know how to graph it.
*April 18, 2010*

**Algebra**

Equation: 2x/5-x/3=5 (2x/5 and x/3 is a fraction) I know that you are suppose to combine like terms, like x, but don't know what I need to do, since they are fractions. Help please.
*April 17, 2010*

**Algebra 2**

A car enters a interstate highway 15 mi north of the city. The car travels due north at an avrage speed of 62.5 mph. Write an equation to model the car's distance from the city after traveling for h hours.
*April 9, 2010*

**Algebra**

Okay. I thought this was true, but was confused. Thanks for clearing this up for me. And also for a fast response.
*April 9, 2010*

**Algebra**

Solve this equation: -4x^2=0 Lost what to do to solve this equation, especially with the exponent of 2.
*April 9, 2010*

**Math**

Ok. Can you explain how this is so? Just so I know and understand.
*April 8, 2010*

**Math**

Write a brief scenario that can modeled with a linear equation. AND Summarize a situation modeled by a quadratic equation. I am completly lost with these two questions. I understand the difference between these two functins but don't know how to come up with a scenario or ...
*April 8, 2010*

**Math**

Given that P(A)= 1/36, what are the odds against A occuring? I found this formula in my chapter odds against A= 1-P(a)/P(a) Would it be 1-1/36 over 1/36? Or how do I go about it?
*March 21, 2010*

**Math - # theory**

1.8984375 E-20 is on a calculator. What is the 20th digit to the right of the decimal. I need to know how to work it, not the answer.
*March 9, 2010*

**geometry**

commutative
*March 9, 2010*

**Math**

Ok. I counted some numbers twice. I needed to write the numbers out like you did. Thanks
*March 7, 2010*

**Math**

Would the total possible outcomes be 17? The number of evens would be 10 and the multiply of 3 is 7. So 10 and 7 together is 10.
*March 7, 2010*

**Math**

A spinner has regions numbered 1 through 21. What is the probability that the spinner will stop on an even number or a multiple of 3? Okay so I am lost. I understand that the probability of an event is the # of ways an event can occur over the total # of possible outcomes. I ...
*March 7, 2010*

**Math**

After I posted that, I realized that I should have put down 52 (rounded). I actually got the total number of weeks in a year, by the interent. It had this number, but also the 52.365. Not sure how they did that. Thanks
*March 7, 2010*

**Math**

Question: The total yearly food bill for a family of four is $8589.88. To the nearest cent, what is the mean weekly food bill? Would I take $8589.88 divided by 52.365 (this is the number of weeks in a year) to get the answer $164.04?
*March 7, 2010*

**Math**

I see. I understand. I was wondering why I was getting such a weird number. Thank you!!
*March 6, 2010*

**Math**

I have a bar graph that shows the number of students by major in the College of Arts and Science. Math shows 200 students History shows 300 students English shows 400 students Science shows 150 students Other shows 175 students What percent of students in the college are ...
*March 6, 2010*

**english**

I am writing a descritive essay about the Mcdonald's Big Mac. I am having trouble coming up with adjectives to describe how it looks, tastes, feels, sounds, and tastes like. Also some adjectives to describe how eating this makes me feel. Can you help?
*February 27, 2010*

**physics**

A 6.0-kg box is raised a distance of 3.0m from rest by a vertical applied force of 80 N. Find (a) the work done on the box by the applied force, (b) the work done on the box by gravity, and (c) the final kinetic energy of the box.
*February 24, 2010*

**Math**

Thank you !
*January 27, 2010*

**Math**

2 cups of flour = 6 cookies x cups of flour = 10 cookies I found out that 3 cookies get 1 cup of flour and each cookie get 1/3 cup . Also 3 1/3 cups equal 10 cookies . Now i have to write and solve a proportion and i dont know how to do that . Can you please help me ?
*January 27, 2010*

**math**

15, 21, 21, 24, 25, 26, 35
*December 13, 2009*

**Managerial Economics**

The Largo Publishing House uses 400 printers and 200 printing presses to produce books. A printer's wage rate is $20, and the price of a printing press is $5,000. The last printer added 20 books to total output, while the last press added 1,000 books to total output. Is ...
*November 10, 2009*