Friday

April 29, 2016
Total # Posts: 925

**chemistry**

great thanks a lot, soz bout double post
*August 6, 2009*

**chemistry**

if equal volumes of solutions having pH6 and pH7 are mixed what is the resulting pH?
*August 6, 2009*

**chemistry**

if equal volumes of pH6 and pH7 are added what is the resulting pH?
*August 6, 2009*

**math**

greatest mean would refer to the highest average life of each light bulb, while the greatest median when looking at a 5 year supply is not as relevant, half your light bulbs would have a lifespan below the median and half would have a life span above. Compare this to all light...
*August 5, 2009*

**math**

20-2=18 18*7=126 126-12=114 114/2=57 you would have 57 cookies
*August 5, 2009*

**Math**

exactly, say it was a 5 sided dice, each side labeled A-E. P is probability, what is the probability of rolling an A OR an E the shorthand notation being P(AorE) the answer should be given as a decimal, 1 meaning that the outcome is certain to happen, 0 meaning there is no ...
*August 5, 2009*

**nutrition and wellness**

C. Fiber
*July 29, 2009*

**Math**

If f(x)=x^2-2 and g(x)=1/(3x) (x does not equal 0), find (f+g)(x) and f(fxg)(-2)
*July 27, 2009*

**Grammar**

which is the complete subject,simple subject The two-and-a-half-month-old child received 2nd degree burns across the bridge of his nose. simple subject is: received 2nd degree burns :complete subject is two-and-a-half-month-old
*July 26, 2009*

**7th grade**

Using the waterways was the easiest way to transport goods in those days, it would also have been quicker than a horse or ox drawn wagon that did not have established roads to go on.
*June 29, 2009*

**Math**

Need help. Multiply using the rule for the square of a binomial (6x^2-4)^2
*June 19, 2009*

**Spanish**

Can someone help me with this please Re-write the following dialogue adding the correct form of “estar” or the gerundio of the verb (other than estar) in parenthesis to form the present progressive form. Jose: Hola María. ¿Qué ___(5)___ (ESTAR t&...
*May 25, 2009*

**7th grade input/output patterns**

I need to see a completed example of input/output patterns at the 7th grade level. Thanks,
*April 17, 2009*

**7th grade**

How much lace edging is needed to go around a circular tablecloth with a diameter of 6 ft?
*April 15, 2009*

**HELP Physics**

A 2 cm object is placed 36 cm from a screen. Where should a converging lens of focal length 8 cm be placed between them to form a clear image on the screen? What two possible magnifications could the image have?
*March 10, 2009*

**physics HELP**

(m)/(1/s) would give you (m)*(s/1)=ms, so it can't be D. (m/1)*(1/s) WOULD give you m/s, though, so the answer must be B.
*March 10, 2009*

**physics HELP**

Hz = 1/s What would you do to 1/s to get m/s?
*March 10, 2009*

**Algebra**

Thank you a million Reiny.
*March 9, 2009*

**Algebra**

Thank you so much you are a god.. can you pleas ehelp me wit h the word problem?
*March 9, 2009*

**Algebra**

in that equation I have to solve for x. 5. x^3 + 2x^2 - 9x = 18 in this word problem i have to solve my factoring. 8. Suppose the altitude of a rising hot-air balloon is given by h = 0.04 t2 + 2t, where “t” is the time in seconds after the balloon leaves the ground. ...
*March 9, 2009*

**algebra interest word problem**

i don't know
*March 9, 2009*

**algebra interest word problem**

its $2166 NOT $166
*March 9, 2009*

**algebra interest word problem**

i don't know how to work it. didn't work out.
*March 9, 2009*

**algebra interest word problem**

Erin Grabish recevied $2,000 for speaking at a financial planning seminar. Erin invested the money in a certificate of deposit for 2 years. When she redeemed the certificate of deposit, she received $2166. What simple interest rate did Erin receive on this certificate of deposit?
*March 9, 2009*

**algebra interest word problem**

THANK YOU!
*March 9, 2009*

**algebra interest word problem**

Steve Marino borrowed $500 from his credit union for 2 years. The simple that he paid was $52.90. What simple interest rate was Jeff charged?
*March 9, 2009*

**Enm Science**

What are the advantages and disadvantages of animal studies and epidemiological studies for establishing dose-response relationships?
*March 7, 2009*

**5th grade**

5-4x4 divided by 7 plus 4 = negative 13 and 2 7ths.....can you insert parentheses to make this a true number sentence?
*March 5, 2009*

**science**

what is a longhorn and what does it look like
*February 25, 2009*

**science**

What is the value of knowing whether your sore throat is caused by a virus or a bacteria?
*February 24, 2009*

**physics.**

Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of ...
*February 11, 2009*

**physics. Can you check my answer?**

I just realized that the answer had to be 10. Im sorry for any confusion. Thank you for your help though.
*February 11, 2009*

**physics. Can you check my answer?**

I submitted it online and I was told it was wrong. I also tried 10.22 and 10.24 to see if there was a rounding error.
*February 11, 2009*

**physics. Can you check my answer?**

Two spherical objects are separated by a distance of 2.41 x 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object...
*February 11, 2009*

**physics**

Ok. I did that and I found that Q= 1.64 x 10 ^ -18. I then divided that by 1.6 x 10 ^ -19. The answer I got was 10.23. I am being told that is the wrong answer. Could you please double check that for me? Thank you!!
*February 11, 2009*

**physics**

Two spherical objects are separated by a distance of 2.41 x 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object...
*February 11, 2009*

**Math**

Simplify: 3x (to the -2 power) 2x(3rd power)times x(to the -2 power) times x(to the 7 power) 3x (to the negative 3 power) times (-4 power)
*January 19, 2009*

**books**

The Call of the Wild: One of the themes in Jack London's book, "The Call of the Wild" is power. Discuss Buck's use of power throughout the book.
*January 15, 2009*

**geometry**

how do you find the circumference of a circle with the area of 169 pie m squared(in the terms of pie)? Please tell me how to do it. Don't just give me the answer
*January 12, 2009*

**Biochemistry**

When do plants carry out aerobic respiration
*January 8, 2009*

**6th grade Math**

If your doing that then find if its a decimal if so you only put 2 or 3 threes
*January 7, 2009*

**Science**

Explain how stomates help maintain homeostasis within the leaf.
*January 4, 2009*

**Science**

Describe the feedback mechanism that occurs at the stomates of plants.
*January 4, 2009*

**6th grade Math**

I have a word problem with a pattern. I just can't figure it out. - On the first night, Kim's mom gave her a nickel, on the second, she gave her five nickels, on the third, she gave her fourteen nickels and on the fourth night she gave her thirty nickels. Her mother ...
*December 18, 2008*

**chemistry**

Ok. Thank you.
*December 3, 2008*

**chemistry**

When I use the lowest number of digits (i think your talking about .09) I get 4.7atm.
*December 3, 2008*

**chemistry**

I am trying to find pressure. R=.0821 T=1273 K V=2 n=.0997 When I put .0997 in the PV=nRT equation I get 5.2 atm, and when I put in .09 I get 4.7 atm. Which answer should I put? Which is more accurate?
*December 3, 2008*

**Chemistry. Please help!**

That is what I am thinking. Thanks.
*December 3, 2008*

**Chemistry. Please help!**

I gave three different answers. Which one looks OK?
*December 3, 2008*

**Chemistry. Please help!**

A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original sample was magnesium...
*December 3, 2008*

**Chemistry**

So that would give you .39 mol. Which would then give you P = 20.77 atm. I see what you are saying about the numbers in this problem. Unfortunately my teachers often gives problems that seem to have something missing, and I dont know what to do about it. I was also wondering ...
*December 2, 2008*

**Chemistry**

Those are all the numbers in the problem. I worked further in the problem and found... (a) 15.9/20.29= 78.54% and for part (b) I found that 20.29g of MgCO3 makes .24mol CO2. So.... Pressure of CO2 = 12.54 atm. Does that seem right?
*December 2, 2008*

**Chemistry**

A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original sample was magnesium...
*December 2, 2008*

**chemistry Plz help!**

To make NaTcO4, Tc metal is dissolved in nitric acid to make HTcO4, NO2 and H2O. Then the product HTcO4 is treated with NaOH to make NaTcO4. If you begin with 4.5 mg of Tc metal, how much of NaOH (in grams) is required to convert all of the HTcO4 into NaTcO4? I dont even know ...
*December 2, 2008*

**social studies**

what challenges did english settlers in north america face?
*December 1, 2008*

**chemistry**

I HATE CHEMISTRy
*November 23, 2008*

**Chemistry.**

Calculate the mass of CaCO3 that would produce 40 mL at STP. STP means P= 1 atm and T= 0 degrees C. How do I find the mass?
*November 22, 2008*

**Eighth Grade Math**

What are two ways to find the answer to 168 times 55 ?
*November 19, 2008*

**Eighth Grade Math**

What are two ways to find the answer to 237 times 76 ?
*November 19, 2008*

**Eighth Grade Science**

A tube has gas within it whose volume equals 250 liters at a temperature of 300 celsius K . If the pressure of the gas is kept constant, what will the temperature be if the gas volume is increased by 50 liters ?
*November 19, 2008*

**Eighth Grade Science**

At 275 celcuis K ,an air filled balloon has a volume of 200 liters . If the pressure of the air remains constant, what will its volume be at 300 celsius K ?
*November 19, 2008*

**Science**

A liter(1000cubed)of gas is under a pressure of 80.00cm of mercury . What pressure is needed in order to reduce the original volume of the gas to 600.0cm cubed?
*November 19, 2008*

**Chemistry**

Each of four identical tires of a car is filled with a different gas. Gas pressure in each tire is 3.0 atm at 25oC. One tire contains neon, another – argon, the 3rd one has krypton, and the last one has unknown gas. How many molecules are there in each tire? So far, I ...
*November 12, 2008*

**chemistry**

For that part I thought that the formula would be NiF2.
*November 12, 2008*

**chemistry**

Suppose you live in a different universe where different amount of quantum numbers is required to describe the atomic orbitals. These quantum numbers have the following rules: N principal 1,2,3,…. L orbital =N M magnetic -1. 0. +1 How many orbitals are there all together ...
*November 12, 2008*

**Physcial science**

How many joules of heat are required to melt 40kg of ice at 0 degrees celsious?
*November 3, 2008*

**Physical Science**

How much current flows in a 12-watt radio connected to a 120-Volt circuit?
*November 3, 2008*

**physical science**

How much current flows in a 12-watt radio connected to a 120-Volt circuit?
*November 2, 2008*

**math studies**

Put the equation in standard form which would be y=4x+ 12 ^ ^ m a
*October 21, 2008*

**Math**

Kelly subtracted 2.3 from 20 and got 17.7. Explain why this is reasonable.
*October 19, 2008*

**accounting**

Each stock holder is paid $1,500 in cash dividends. But it doesn't say how many stock holders there are.
*October 14, 2008*

**accounting**

Two owners contribute $100,000 in cash and receive 4,000 shares of stocks in the business. What do you debit/credit?
*October 14, 2008*

**3rd grade**

grade 1 215 grade 2 186 grade 3 259 how many more were sold bt grade 3 than by grade 2? 73 answer why aren't any of the tens regrouped to subtract the ones?
*October 1, 2008*

**3rd grade math**

Explain how you would use a number line to round 148 to the nearest ten.
*September 24, 2008*

**math Third grade**

is a number with the most ditis always greater and why/
*September 22, 2008*

**math**

hyhkjxstukmxshutjsjyustetujmuemfcuiryk,eukym jmkiyi;p9loirhytyjulo;p8'[0;pyjuh;p9lo8i76jutykli8oiyj
*September 22, 2008*

**math Third grade**

Draw a number line. Make sure the following numbers are on your number line; 1,472; 1,560; 1,481
*September 22, 2008*

**Chemistry**

91.1 atm
*September 21, 2008*

**reading**

write an alphabet poem about something you see and hear around you.
*September 18, 2008*

**math**

thank you
*September 18, 2008*

**math**

explain why 24005 is greater than 8999
*September 18, 2008*

**3rd grade**

an example of an alphabet poem.
*September 18, 2008*

**3rd grade**

explain why 1,734 is greater than 175
*September 18, 2008*

**3rd grade**

how is 1,734 greater than 175?
*September 18, 2008*

**3rd grade**

Explain how to compare 8,563 and 8699
*September 18, 2008*

**math**

explain how 8 ten thousands can be equal to 80 thousands
*September 17, 2008*

**History**

How did China and Persia come into contact with one another?
*September 15, 2008*

**social studies**

what was one result of zheng he's yoyage
*September 15, 2008*

**social studies**

why did zheng he's fleet try to reach many new places
*September 15, 2008*

**social studies**

what effect did marco polo journey have on others
*September 15, 2008*

**social studies**

whatplaces did the silk road connect
*September 15, 2008*

**Social Studies**

why did marco polo go to china
*September 15, 2008*

**5th grade**

thank you ALisha for answering my question. you just did my homework
*September 15, 2008*

**5th grade**

Can you explain what the "Silk Road" is?
*September 15, 2008*

**Math**

explain how you would write 423,090,709,000 in word form
*September 12, 2008*

**American History**

I have been assigned a paragraph to "decode" of the Declaration of Independence. I am supposed to write it to make it so that it is easily understood and read-able. I'm having a hard time with it though, because I don't know what the actual words mean. It is ...
*September 8, 2008*

**history**

who discovered america?
*September 3, 2008*

**ENGLISH**

WHICH ONE OF THE FOLLOWING IS BEST SUITED FOR THE TOPIC "MY FIRST DAY AT MY NEW JOB"?
*August 7, 2008*

**english**

Which of the following sentence is grammatically correct. A.I really need to lay down. B.Sit it down over there by the window. C.I thought it would be best if I were to rise the curtain. D.The men came today to lay the carpet in the living. Answer:D but shouldn't it be, ...
*August 7, 2008*