Wednesday

February 22, 2017
Total # Posts: 730

**Chemistry**

How many grams of nitrogen monoxide gas can be produced from 80.0 ml of 4.00 M HNO3 and excess Cu? 3Cu(s)+ 8Hno3(aq)-> 3Cu(NO3)2(aq)+4H2O(/)+2NO(g)

*December 14, 2010*

**Chemistry**

Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is binary, monoprotic acid...

*December 13, 2010*

**Chemistry**

Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is binary, monoprotic ...

*December 12, 2010*

**Chemistry**

Element M(a solid) reacts with an aqueous solution of compound B to form an aqueous solution of compound C(a salt) and a gas composed of element D. When 1.000g of element M is reacted with excess oxgen 1.658g of the compound MO are formed. Compound B is binary, monoprotic acid...

*December 12, 2010*

**algebra**

4. Write an equation for the line through the points (2, -6) and (-1, -4).

*December 9, 2010*

**Chemistry**

Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the precipitate. Care...

*December 8, 2010*

**algebra**

P(1, 3) and R(5, 5) are the endpoints of a diagonal of the rectangle PQRS. Which sides of the rectangle are parallel to the x-axis? To the y-axis? What is the perimeter of the rectangle?

*December 7, 2010*

**Chemistry**

Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the precipitate. ...

*December 7, 2010*

**chemistry**

Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the precipitate. Care...

*December 7, 2010*

**Chemistry**

When 50.0 g of iron(3)nitrate, FE(NO3)3, is dissolved in water , the number of nitrate ions present in the solution is

*December 6, 2010*

**social studies**

What does this quote mean? “Why should the Indian be expected to plant corn, fence lands, build houses, or do anything but get food from day to day, when experience has taught him that the product of his labor will be seized by the white man to-morrow? The most ...

*December 1, 2010*

**economics**

What were greenbacks?

*November 29, 2010*

**Physics**

Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse sismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is ...

*November 23, 2010*

**Physics**

i got the same answers you got but they are being read a sincorrect in my assignment.

*November 23, 2010*

**Physics**

The wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m. 2) What is the wavelength of the wave? 3)What is the frequency of the wave?

*November 23, 2010*

**Chemistry**

During the combustion of 5.00 g of octane, C8H18, 239.5 kcal is released. a) What is the sign of (delta)H for this reaction? b) How much energy is released by the combustion of 1.00 mol of C8H18

*November 15, 2010*

**physical chemistry**

For the process CH4(g) = C(s) + 2H2(g) A reaction is started in a rigid vessel at 1000 K with 1 mole of methane and 1 mole of hydrogen gas at 10 bar. Use table C.3 from your text to determine how many grams of carbon should be formed after the reaction has reached equilibrium.

*November 12, 2010*

**calculus**

Find the derivative of y=t^2(5t-8)^4.

*October 19, 2010*

**math**

Calculate the lower quartile (QL) in the following data set: (8, 6, 13, 8, 3, 15, 12, 5).

*October 15, 2010*

**Chemistry**

Ok I will try Kelvin. Thank you

*September 26, 2010*

**Chemistry**

I attempted using the Clausius-Clapeyron Equation and I am not getting anywhere

*September 26, 2010*

**Chemistry**

The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1 degrees Celsius and 100.0 torr at -6.3 degrees Celsius. What is delta Hvap of chloroform?

*September 26, 2010*

**Statistics**

Is the water on your airline flight safe to drink? It is not feasible to analyze the water on every flight, so sampling is necessary. In August and September 2004 the EPA found bacterial contamination in water samples from the lavatories and gallery water taps on 20 of 158 ...

*September 19, 2010*

**chemistry**

d,Atomic mass= fraction of the isotope X mass of the isotope.

*September 6, 2010*

**Statistics**

Calculate each binomial probability: a. Fewer than 4 successes in 12 trials with a 10 percent chance of success. b. At least 3 successes in 7 trials with a 40 percent chance of success. c. At most 9 successes in 14 trials with a 60 percent chance of success. d. More than 10 ...

*August 29, 2010*

**college**

Many organizational situations involve an audience that consists of a group of people. Which is an approach to analyzing this type of audience?

*August 10, 2010*

**chemistry**

Tums is added to 30.0 of 0.400m of HCL , how many grams of CO2gas are produced?

*July 20, 2010*

**Physics**

a ball is thrown vertically upward from the ground with the velocity of 30m/s. a) how long will it take to rise to its highest poitn? b) how high does the ball rise? c) how long after projection will the ball have a velocity of 10m/s? d) what is the total time of flight?

*July 19, 2010*

**Physics**

U=0,t=T,

*June 8, 2010*

**math**

square root 4y=10

*June 1, 2010*

**Vector**

2. Determine the Cartesian equation of the plane passing through the point P(2, -1,2) and containing the line r = (2, -1, 4) + f(0, 3, -5).

*June 1, 2010*

**Bikini Bottom**

huh? you are? What am I then?

*June 1, 2010*

**math**

How can fishermen save gas?

*May 31, 2010*

**Vector**

The points U(4,-1,2), V(-1,-1,-1) and W(-4,2,4) dermine a triangle in R^3 a) Determine the parametric equations for thr three lines containing the 3 sides of the triangle

*May 31, 2010*

**psychology**

all of the following are true of gestalt therapy except

*May 2, 2010*

**Politics iran**

Thank you and enjoy your trip :). I read your post about it.

*April 27, 2010*

**Politics iran**

Is this correct? The political values of Iran are influened by shari'a law? In other words Islamic law?

*April 27, 2010*

**History (social oppression)**

I'm having trouble understanding what social oppression is. Can it be applied to poor hating on other poors?

*April 26, 2010*

**hmm...?**

A clinic is a place where clients or patients receive diagnosis and treatment. So, a clinical psychiatrist is a psychiatrist involved in diagnosis and treatment of people with psychological challenges. Compare this to the theoretical psychologist and professor of psychology, ...

*February 23, 2010*

**math**

The unit rate for the first one is 98 yd/sec. 30 ounces for $3.48 is S8.62/oz. It is the best buy.

*February 11, 2010*

**math**

Which can be simplified to 13:4.

*February 11, 2010*

**math**

5/4*61/8 =305/32 =9.53125

*February 11, 2010*

**Computers**

Thanks, that was imformative.

*February 11, 2010*

**Computers**

This may seem irrelevant, but why is this site so oddly named?

*February 11, 2010*

**4th grade math**

9 miles long.

*February 11, 2010*

**programming**

java, write a program that prints out the letter X composed of asterisks (*) reply soon

*February 4, 2010*

**math**

How would I round the number 226,542,203 to the nearest million

*January 12, 2010*

**chemistry**

im confused about ionic substances. can someone give me a example of ionic substances?

*December 9, 2009*

**chemistry**

can someone explain a diatomic molecule, monatomic gas and what would happen if a metal atom bond with a nonmetal atom?

*November 23, 2009*

**Algebra**

Why is television called a communications medium?

*November 8, 2009*

**social studies**

do you know any websites that have any primary sources dealing with the roman empire, such as religion, war and conflict, culture, etc?

*November 1, 2009*

**Calc**

Thank you!

*October 26, 2009*

**Calc**

For y sec(x) = 3x tan(y), the direction above it says "Regard y as the independent variable and x as the dependent variable and use implicit differentiation to find dx/dy." I do now know if that makes any different and I believe I have 4 lives left. For the x3 + y3= ...

*October 26, 2009*

**Calc**

Thank you! For y sec(x) = 3x tan(y) I got dy/dx = (3 tan(y) - y tan(x)sec(x)) / (sec(x) - 3x sec²(y)) but it was still incorrect... I have no idea how to do y = arctan[(sqrt((1 + x)/(1 - x)))] because i never did this type of problem before, help please. here is another ...

*October 26, 2009*

**Calc**

Thank for replying =D. Unfortunately, I have been using implicit differentiation and I do not fully understand the logarithm. I am still getting an incorrect answer. Please show me an example on how to solve these problems. Thank you.

*October 26, 2009*

**Calc**

Can anyone help me find the derivative of these functions? y = x^2x y = x^-cos(x) y = ln(7x^2 + 5y^2) sqrt(3x+y)=2+x^2y^2 ysec(x) = 3xtan(y) y = arctan[(sqrt((1 + x)/(1 - x)))]

*October 26, 2009*

**elementary**

It must be an elementary question because I too have the same question on my homework. I was thinking the shape they are looking for is a trapezoid but still having problems getting to the .95 out of .30, 1.25 and 1.00

*October 22, 2009*

**sociology**

Conflict Perspective

*October 12, 2009*

**english 7th grade**

whatever memory you choose, how were you felling at exactly that time, right then and a stanza is like the separate paragraphs in a poem like when it skips a couple lines those separate paragraphs are stanzas hope i could help=)

*October 6, 2009*

**social studies**

christopher columbus was looking for a way to india and accidentily found america instead

*October 6, 2009*

**Math**

scientific notation

*October 6, 2009*

**8th grade**

ok my teacher just assigned me this wikid stupid worksheet with a riddle whom do you see at the bank if you need to borrow money?

*October 6, 2009*

**biology**

haha=)

*October 6, 2009*

**biology**

thanks for the math answer now that i think about it its kind of obvious but thanks =)

*October 6, 2009*

**BIOLOGY**

Heat exhaustion caused by a person's exposure to heat can result in weakness or collapse. It usually involves a decrease in blood pressure. Explain why the homeostasis adjustment to heat can cause a drop in blood pressure. ---------- I'm not sure if I'm correct. ...

*September 30, 2009*

**math**

Name the ordered pair if the x-intercept is -2.

*September 29, 2009*

**Calculus**

Is it 4 or 1?

*September 29, 2009*

**Calculus**

cos4x^2 + sin4x^2?

*September 29, 2009*

**(math) geometry**

i have to find the next two terms for a pattern of H,He,LI,Be. I am confused any help?

*September 16, 2009*

**Advanced Math**

A set of 750 values has a normal distribution with a mean of 12.5 and a standard deviation of 0.36. A. What percent of the data is between 12.25 and 12.75? ANSWER: 51.6% B. Find the interval about the mean within wich 45% of the data lie. ANSWER: 12.28-12.72 C. Find the ...

*August 11, 2009*

**English IV**

The effect urban life has on the woman in the poem "Preludes" by T.S. Elliot is she: A. has become sophisticated. B. has developed wisdom. C. is depressed. D. is sordid and "dirty" like the city. I think it may be either B or C. 1 - The tone of the poem &...

*July 19, 2009*

**Maths**

Worked out combination of women and men Either 3 women and 3 men or 4 men and 2 women Then comination for the 2 Women was n = 4 no. of combos was 6 and r = 2 and for the 3 women n = 4 and r = 3 no. of combos was 4 Follow the formula n!/(n-r)! x (r!) Same process for men. In ...

*July 15, 2009*

**Literature**

In the poem "The Lady of Shalott," what does the web she weaves symbolize? A. Anger. B. Pain. C. Reality. D. A curse. I'm stuck between C and D?

*July 15, 2009*

**Literature**

1 - In Ulysses by Alfred, Lord Tennyson, Ulysses is unhappy because: a - he's idle. b - the war has started. c - he has to leave his son. d - he's no longer leader of his country. Are these correct? MY ANSWER: A 2 - What crisis does Ulysses face? a - war. b - losing ...

*July 15, 2009*

**Advanced Math**

Yes, I had a typo sorry. It was. (2x^2+3)(x-1) Is it 19 now?

*June 15, 2009*

**Advanced Math**

1. The distance s(t) between an object and its starting point is given by the anti derivitive of the velocity function v(t). find the distance between the object and its starting point after 15 sec if v(t)=0.2t^2+2t+10 meters/seconds. MY ANSWER: 600 meters. 2.Find the slope of...

*June 15, 2009*

**Advanced Math**

The probability of getting 2 heads and 1 tail when three coins are tossed is 3 in 8. Find the odds of not getting 2 heads and 1 tail. ANSWER: 5:8? Three Coins are tossed. Find the probability that exactly 2 coins show heads if the first coin shows heads.? ANSWERS: Could it be ...

*June 10, 2009*

**Government**

Suppose you want to take a scientific poll about people’s opinion on a new boating law for Lake Blue. Who should make up your universe—all the people in the United States, only townspeople, only boat owners, only people who live on the lake, anyone who uses Lake Blue...

*May 12, 2009*

**Physics**

The horizontal motion of a horizontally launched projectile affects its vertical motion. (FALSE) A missile launches at a velocity of 30.0 m/s at an angle of 30.0* to the normal. What is the maximum height the missile attains? (11.5 m, I'm not very sure) In calculating the ...

*May 6, 2009*

**Pre Calc.**

Use the sum or difference identity to find the exact value of sin255 degrees. My answer: (-sqrt(2)- sqrt(6)) / (4) Find the value of tan (alpha-beta), if cos alpha= -3/5, sin beta= 5/13, 90<alpha<180, and 90<beta<180. My answer: -33/56 Which expression is ...

*April 22, 2009*

**math**

can i get a link containing a list of the theorems and postulates of a 2 column geometry proof?

*April 12, 2009*

**math**

In a coordinate plane, what is the total number of points 5 unita from the origin and equidistant from both the x and y axes? 1)1 2)2 3)3 4)4

*April 11, 2009*

**Pre cal.**

Determine the linear velocity of a point rotating at 25 revolutions per minute at a distance of 2 feet from the center of the rotating object. Give answer in feet/sec/ 25/60 = 5/12 revs per second Convert rev per second to rad/sec 5/12*2*pi = 2.618 rad/sec at a distance of 2 ...

*April 1, 2009*

**Pre Cal.**

Given that x is an integer between -2 and 2, state the relation represented by the equation y = 2-abs(x) by listing a set of ordered pairs. Then state whether the relation is a function. I think it's: (-2,0) (-1,1) (0,2) (1,1) (2,0)

*April 1, 2009*

**Physics - Waves**

So the answer is 400(345.8/340.8) = 405.87 Hz?

*February 1, 2009*

**Physics - Waves**

So the answer to the first question is 394.3 Hz and the answer to the second question is 400 Hz?

*February 1, 2009*

**Physics - Waves**

My thinking is: f2=f1(V/V+Vs) f2=Heard frequency=394.3 Hz f1=Source frequency=400Hz V=velocity of sound in medium=332+0.6(23)=345.8 m/s Vs=velocity of source=5 m/s I'm not sure about the second question, though.

*February 1, 2009*

**Physics - Waves**

A speaker which produces a frequency of 400 Hz is moving away from an observer and towards a wall at 5 m/s when it is 23 degrees Celsius. What is the frequency of the sound that travels back to the observer? What is the frequency of the sound that travels forward and bounces ...

*February 1, 2009*

**Algebra**

I think I have the correct equation, but can someone please double check and tell me if I am correct. Scenario: Suppose that the width of a rectangle is 5 inches shorter than the length, and that the perimeter of the rectangle is 50. Question: Set up an equation for the ...

*January 3, 2009*

**math**

Louise is 8 years old now

*October 29, 2008*

**AP U.S History "American Pageant" Series**

I congratulate you for your confidence that although you do not already understand the material in this course, you eventually will learn much more through the process of TRYING to learn and understand. You WILL learn more by trying to learn more, and that's what education...

*October 18, 2008*

**english composition**

Watching horror movies is a way of feeding our inner insanity and bave our nightmares.

*October 11, 2008*

**music-buddy holly**

i`m doing a school projrct about buddy holly ive looked in the site drwls suggested but i can`t find much info or many pictures . any ideas thanks

*September 22, 2008*

**chemistry**

how do you do the conversion?

*August 23, 2008*

**chemistry**

convert 5.98 x 10 to the 24th kg. to mg.

*August 23, 2008*

**Geometry**

Next 2 in the pattern M,V,E,M,...

*August 14, 2008*

**Finance**

The Victoria Nursery, which provides facilities for pre-school children on a commercial basis, is preparing its cash budget for next year. A profile of the estimated revenues and expenses for the first four months of the year is as follows: Jan Feb Mar Apr £ £ &...

*March 21, 2008*

**Analysis & Design**

How can a project manager be sure that he or she has chosen the correct metrics to assess project performance? I need a few examples please.

*February 29, 2008*

**Algebra**

How can you determine if two lines are perpendicular?

*February 27, 2008*