Saturday

December 20, 2014

December 20, 2014

Total # Posts: 189

**college chem**

Calculate the pH of a 25 mL sample of distilled water after the addition of 1 mL, 2 mL, 3 mL, 4 mL, and 5 mL of NaOH and HCL. (0.1 M HCl and NaOH) In total, you need to show 10 calculations.
*March 14, 2011*

**Chemistry**

Calculate the pH of a 25 mL sample of distilled water after the addition of 1 mL, 2 mL, 3 mL, 4 mL, and 5 mL of NaOH and HCL. (0.1 M HCl and NaOH) In total, you need to show 10 calculations.
*March 14, 2011*

**math**

A mother wants to invest $9,000.00 for her son’s future education. She invents a portion of the money in a bank certificate of deposit (Cd account) which earns 4% and the remainder in a saving bond that earns 7%. If the total interest earned after one year is $540.00, how...
*March 9, 2011*

**MATH**

A truck enters a highway driving 60mph. A car enter the highway at the same place 14 minutes later and drives 66mph in the dame direction. From the time the car enters the highway, how long will it take the car to pass th truck?
*March 9, 2011*

**Trigonometry**

how do you solve for y=sinX+2. just the phase shift and period. even how to graph if anyone knows. i got stuck with this one
*March 9, 2011*

**geometry **

The density of a block of wood is 0.78 grams per cubic centimeters. What is the volume of the block if its mass is 28.8 grams?
*February 18, 2011*

**9th grade chemistry**

How do you determine the density of 22 ml of a blue liquid that has a mass of 51.1g
*January 14, 2011*

**arithmetic**

2.750 +0.003 +0.158 =2.911
*December 22, 2010*

**Math help**

Losing your bags during airline travel is not all that uncommon. Recently, an airline was cited for losing customers' baggage 8% of the time. A test is conducted by randomly selecting 20 customers for that airline and observing whether they had lost their baggage. Provide ...
*December 9, 2010*

**PHI 103**

17. <11{6[1(07)71]}> The higher the price of an antique, the greater people’s expectation that the object is rare. That, in turn, makes the antique appear more valuable. If the statements above are correct, then offering an antique for sale at a bargain price (...
*December 4, 2010*

**PHI 103**

thats how they name the courses im not sure. The question also don't state the number of students Im guessing its an anology. The conclusion above is not necessarily valid because (Points : 1) more students in the morning class may have passed the test than failed the test...
*December 4, 2010*

**Organic Chem I Lab**

I had to do this same reaction, only I used 10g NaBr and 25 mL of sulfuric acid, also without success. When my partner and I set up the distillation following reflux, our distillation apparatus blew apart because our lab instructions neglected to direct us to add a boiling ...
*November 30, 2010*

**physics**

YOU PUSH A REFRIGERATOR WIT HA FORCE OF 50N AND IT MOVES 3 METERS ACROSS THE FLOOR
*November 10, 2010*

**Math**

What is the function rule for input3, output3, input4, output5, input6, output9
*November 8, 2010*

**Algebra**

Mattie Evans drove 250 miles in the same amount of time that it took a turbopropeller plane to travel 1250 miles. The speed of the plane was 200 mph faster than the speed of the car. Find the speed of the plane
*November 6, 2010*

**Algebra**

M = gw/g+w ... solve for w .... what's the steps I need to solve for w
*November 6, 2010*

**Spelling**

would "supply" follow the vcccv pattern?
*November 2, 2010*

**math**

Solve. 9-9x/4x+8 multiplied by 2x+4/3x+3
*October 31, 2010*

**math**

I HAVE TWO QUESTIONS: I HAVE TO MULTIPLY AND SIMPLIFY AND I HAVE NO CLUE HERE ARE THE PROBLEMS: 1. 7a-21a^2/9a^2+6a+1 x 9a^2+6a+1/9a^2-1 2. 2a+2/8a+24 x 4x+12/2x^2-2
*October 28, 2010*

**MATH**

what is the fact of 2x^2+34x-141
*October 26, 2010*

**MATH HELP NOW**

We are doing solving polynomials using the zero factor property and here is the question: Marie has a rectangular board 18 inches by 23 inches around which she wants to put a uniform border of shells. If she has enough shells for a border whose area is 282 square inches, ...
*October 26, 2010*

**Chemisrty 1**

If ou knew the density of an unknown metal, do you think you could accurately determine the identity of the metal based on that property?
*October 4, 2010*

**physics**

Assuming biological substances are 90% water and the density of water is 1000 kg/meter cubed, estimate the mass of a fly, which can be approximated by a cylinder 4 mm long and 2 mm in diameter (volume (length*pi*radius squared) the answer is 1.131 X10 to the negative 5th power...
*September 19, 2010*

**physics**

yes I meant the density was 1000 kg/meter cubed. but when I multiply the volume of the cylinder (12.56) by the density of water, (1000), i get 12560. the answer is supposed to be 1.131 X10 to the negative 5th power
*September 19, 2010*

**physics**

Assuming biological substances are 90% water and the density of water is 100 kg/meter cubed, estimate the mass of a fly, which can be approximated by a cylinder 4 mm long and 2 mm in diameter (volume (length*pi*radius squared)
*September 19, 2010*

**Algebra**

Juan is 8 years older than his sister Rosa.One day, Juan tells Rosa he is twice her age, but will only be twice her age for one year.To figure out the ages of Juan and Rosa you must first identify the variables. What are the variables in this problem?
*September 16, 2010*

**science**

Is color a property or a mass?
*September 8, 2010*

**The elements and Principles of Design**

JUST TOOK THIS TEST 9-30-14 Every single answer was correct 100% MAKE sure your text matches this one though!
*August 19, 2010*

**english**

The first one.
*June 30, 2010*

**chemistry**

Cyanic
*May 26, 2010*

**Help Math!**

Battery Power Problem. A certain type of thermal battery for an airplane navigation device backup power has a mean life of 300 hours with a standard deviation of 15hours. What proportion of these batteries can be expected to have lives of 322 hours or less? Assume a normal ...
*May 19, 2010*

**Chemistry**

Calculate the freezing- and boiling-point changes for a solution containing 12.0 g of naphthalene (C10H8) in 50.0 g of benzene.
*May 2, 2010*

**MATH**

3/8
*April 19, 2010*

**math**

I need a sketch and label of a figure that has an area of 47 sq. cm.
*April 8, 2010*

**statistics**

what is the actual base of the sears tower
*February 12, 2010*

**chemistry**

Choose any two temperatures and corresponding vapor pressures in the table given, and use those values to calculate change in vaporization for dichloromethane (in kj/mol). T(K) (Pvap (mmHg) 263 80.1 273 133.6 283 213.3 293 329.6 303 495.4 313 724.4
*January 20, 2010*

**chemistry**

hoose any two temperatures and corresponding vapor pressures in the table given, and use those values to calculate for dichloromethane (in ). () () 263 80.1 273 133.6 283 213.3 293 329.6 303 495.4 313 724.4
*January 20, 2010*

**elementary**

correct spelling of the following: two (sister's, sisters') bicycles??
*December 3, 2009*

**Algebra**

How would i solve: 1/6(12-6x)= 5(x+4)
*December 1, 2009*

**Spanish 1**

How would I complete this phrase. Nosotros BLANK americanos. BLANK alumnos en una escuela secundaria. BLANK alumnos en la escuela martin luther king.
*December 1, 2009*

**4th Grade Math**

23 x 17 20 x 10 = 200 3 x 7 x = 21 7 x 20 = 140 3 x 10 = 30 200+140+30+21 = 391 23 x 17 = 391
*October 12, 2009*

**Statistics**

For df = 25, determine the value of A that corresponds to each of the following probabilites: a. P(t >- A)= 0.025 b. P(t <- A)= 0.10 c. P(-A <- t <- A)=0.99
*September 30, 2009*

**Statistics**

From past experience, an airline has found the luggage weight for individual air travelers on its trans-Atlantic route to have a mean of 80 pounds and a standard deviation of 20 pounds. The plane is consistently fully booked and holds 100 passengers. The pilot insists on ...
*September 30, 2009*

**6th grade math**

cut each piece into 3s
*September 23, 2009*

**physics**

A jumbo jet must reach a speed of 360 km/h on the runway for takeoff. What is the least constant acceleration needed for takeoff from a 1.80 km runway?
*September 3, 2009*

**chemistry**

how many grams of solid NaOH are required to prepare 200.0 mL of a .050 M solution?
*September 1, 2009*

**Biochemistry**

what molar mass are you supposed to find?
*September 1, 2009*

**7th grade math**

got it thank you
*May 26, 2009*

**7th grade math**

how did you get the answer
*May 26, 2009*

**7th grade math**

alan,bonnie and calvinshared 153 marbles alan gets 3 times as miny as bonnie and calvin gets 6 more than alan .how miny marbles does each person get
*May 26, 2009*

**pre-calc**

for f(x)=2^x is f(x) an increasing function.?
*December 10, 2008*

**pre-calc**

for f(x)=2^x is f(x) an increasing function.?
*December 10, 2008*

**literature**

100% once again! Thanks too ya'll :)
*December 9, 2008*

**math**

its the end of the lion
*December 7, 2008*

**math**

The average of x and y is 5 and the average of x,y, and z is 8. What is the value of z? a. 19 b. 14 c. 13 D. 11 e. 3 I know that the average of 7 and 3 is 5 (if 7 and 3 are x and y) but I don't know what z is.
*October 14, 2008*

**7th grade**

WHAT DOES CONTRASTING ELEMENTS MEAN?
*October 9, 2008*

**geometry**

the intersection of two line is a ____?
*July 24, 2008*

**Literature-Poetry**

Ashley is right! And so is Country girl! 100% the only one i missed was 5 and thats because I accidentally put A instead of C
*May 28, 2008*

**math**

Thank you Paula :)
*March 16, 2008*

**math**

I was just thinking maybe I didn't state the question correctly. I wasn't trying to irritate anyone and I don't appreciate being scolded for that.
*March 16, 2008*

**math**

I'm sorry to keep asking, but I really need help finding this windows. Usually I put the x and y values as 10 and -10, but with the numbers I don't know how to do it. Is there any way they can be automatically put into the calculator?
*March 16, 2008*

**math**

Can someone please help me with my previous question? I'm not sure what window to use for the equation I previously wrote.
*March 16, 2008*

**math**

How would I find the right window to graph a parabola in? The equation is -8874.6x+113537.2 My teacher said that if the parabola should be tight. But I can't seem to graph this equation. I don't know window I should use on my graphic calculator for this equation.
*March 16, 2008*

**Lit**

I have read the book, and I wasn't sure. In the end Henry is a man, so wouldn't the author think war is good? How does the author say it's bad?
*October 20, 2007*

**Lit**

Using only Stephen Crane's novel, the Red Badge of Courage, explain how he felt about war. Didn't he like it because it was glorious and it made boys turn into men?
*October 20, 2007*

**Social Studies**

I am working on the same crossword, but we dont have a book only notes. I found that colonists sent to the americas by judges were debtors, and he sent "royal" governor. But i also cant find the sole right to trade in an area, a colony leader representatives who made...
*October 8, 2007*

**science**

if yoy had 1.5 liters of water, how many millilters woud you have?
*January 31, 2007*

**Economics**

Do all firms in all market structures have anything in common? I think not. They all consist of buyers and sellers. In Principals of Microeconomics courses, economists make several general economic assumptions (perhaps incorrectly I might add) about firms and the behavior of ...
*December 10, 2006*

**Economic**

Suppose that labor is the only input used by a perfectly competitive firm that can hire workers for $50 per day. The firm’s production function is as follows: Days of Labor/Units of Output: 0/0, 1/7, 2/13, 3/19, 4/25, 5/28, 6/29, 7/29 c. Compute the demand schedule ...
*December 4, 2006*

**Economics**

6. Show the effect of each of the following events on the market for labor in the computer manufacturing industry. Use graphs. a. Congress buys personal computers for all American college students. Wouldn't the demand curve shift to the right while the supply curve stays ...
*December 4, 2006*

**Economics**

3. Suppose the Clean Springs Water Company has a monopoly on bottled water sales in California. If the price of tap water increases, what is the change in Clean Springs' profit-maximizing level of output, price, and profit? Explain in words and with a graph. I would think ...
*December 3, 2006*

**Music**

I heard that "Itsbynne Reel" features stylistic elements of rock and jazz (especially bebop), but I don't recall that this song had bebop elements, can anyone clarify? Yes, according to this article, bebop http://www.scaruffi.com/history/jazz17e.html "...
*December 3, 2006*

**Music**

Doesn't Louis Armstrong begins "West End Blues" with a stop time? You might try browsing these 2 links: http://www.google.com/search?as_q=Armstrong+%22stop+time%22+%22West+End+Blues%22+starts&hl=en&num=10&btnG=Google+Search&as_epq=&as_oq=&as_eq=&lr=&as_ft=i&...
*December 2, 2006*

**Economics**

10. An industry currently has 100 firms, all of which have fixed cost of $16 and average variable cost as follows: Quantity / Average variable cost: (1/$1),(2,$2), (3,$3), (4,$4), (5,$5), and (6,$6) b. The price is currently $10. What is the total quantity supplied in the ...
*November 28, 2006*

**Economic**

How is income distribution affected in monopolies? The market for fertilizer is perfectly competitive. Firms in the market are producing output, but they are currently making economic losses. a. How does the price of fertilizer compare to the average total cost, the average ...
*November 26, 2006*

**History**

What is western civilization? That usually refers to the civilization of Europe, and lands originally colonized by Europeans, such as the Americas and Australia.
*November 25, 2006*

**Music**

Did the Phantom of the Opera have a traditional orchestra without amplification? I thought that the Phantom of the Opera didn't ave a traditional orchestra without amplification is this correct? Did the Phantom of the Opera used successfully opera voices and more ...
*November 25, 2006*

**Economics**

Consider total cost and total revenue given in the following: (Quantity/Total Cost/Total Revenue): (0/8/0), (1/9/8), (2/10/16), (3/11/24), (4/13/32), (5/19/40), (6/27/48), (7/37/56) Can you tell whether this firm is in a competitive industry? If so, can you tell whether the ...
*November 23, 2006*

**Music**

Did Quincy Jones begin his career playing trumpet with Lionel Hampton? Yes. reference: http://www.rhino.com/store/ProductDetail.lasso?Number=74363 Thanks for the information.
*November 23, 2006*

**Economics**

1. Your roommate's long hours in chem lab finally paid off--she discovered a secret formula that lets people do an hour's worth of studying in 5 minutes. So far, she's sold 200 doses and faces the following average-total-cost schedule: Q = 199 & ATC = $199 Q = 200...
*November 19, 2006*

**Economics**

The chapter states that the elderly population in the United States is growing more rapidly than the total population. In particular, the number of workers is rising slowly, while the number of retirees is rising quickly. Concerned about the future of Social Security, some ...
*November 17, 2006*

**Economics**

The chapter states that the elderly population in the United States is growing more rapidly than the total population. In particular, the number of workers is rising slowly, while the number of retirees is rising quickly. Concerned about the future of Social Security, some ...
*November 17, 2006*

**Music**

What are rock ensembles? I went searching around the net to find out and all i came up with was the names of some really good rock bands. I'll try find out something useful but it might take a while =( An "ensemble" is a small group of musicians playing the same ...
*November 16, 2006*

**niagara falls**

what are the Physical Featuers of Niagara Falls? The important features are the height of the drop, the widths of the several sections, and the water flow rate. You can find data on these easily with a search engine. http://wonderclub.com/WorldWonders/NiagaraHistory.html The ...
*September 24, 2006*

**History**

Who is King Tut's father and where is his tomb. http://www.kingtutone.com/tutankhamun/life/ Fourth paragraph =)
*September 18, 2006*

**civic**

homework
*August 23, 2006*

**mathh (unit rate)**

i hate math whats the ratio of 270 mi in 5 h as a unit rate ??????
*August 22, 2006*