Wednesday

December 7, 2016
Total # Posts: 676

**Chemistry**

Why does changing the volume of the reaction vessel have no effect on this equilibrium? CO(g) + Fe3O4(s) <===> CO2(g) + 3FeO(s)

*March 8, 2010*

**chemistry**

a chemist reacts 8.85g or iron with an excess oh hydrogen chloride to form hydrogen gas and iron(II)chloride.calculate the theoretical yield and the percentage yield of hydrogen if 0.27g H2 are collected

*March 7, 2010*

**CHEM**

If 335g water at 65.5 degC loses 9750 J of heat, what is the final temperature of the water?

*March 1, 2010*

**math**

Write as fractions. a. 1/2 of 3/4 b. 1/3 of 3/5 c. 3/4 of 1/6

*March 1, 2010*

**Chemistry**

If 430 mL of 0.837 M aqueous HNO3 and 23.5 g of solid Al are reacted stoichiometrically according to the balanced equation, how many grams of solid Al remain? Round your answer to 3 significant figures. 6HNO3(aq) + 2Al(s) → 3H2(g) + 2Al(NO3)3(aq)

*February 26, 2010*

**math**

an airline passanger fell asleep halfway to her destination. When she woke up, the distance remaining was half the distance traveled while she was asleep. What portion of the trip was she asleep?

*February 23, 2010*

**Physics**

Hi, I tried this question...should we use g as -9.8m/s^2?

*February 5, 2010*

**Physics**

A force of 4.3 x 10-15 N acts between an electric dipole with dipole moment 2.3 x 10-29 C m and an electron. How far away from the dipole is the electron located when it travels along the dipole axis?

*February 5, 2010*

**Physics**

A hydrogen atom consists of a positively charged proton (nucleus) and a negatively charged electron. The following is correct due to Coulomb's law: a.The two particles repel each other b.The electron accelerates toward the proton c.The electron and proton are in mechanical...

*February 5, 2010*

**Microeconomics**

Explain how the supply of new housing interacts with shifts in the demand for owner-occupied housing in your neighbourhood or an area with which you are familiar. In what ways does the mechanism differ from that which exists normally in markets for consumer goods such as ...

*February 1, 2010*

**Chemistry**

The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 425C, the total pressure is 980 mm Hg. The vapor pressure of ethanol at the new temperature is ...

*January 31, 2010*

**Physics**

Sorry for the repost, i made a typo in the original post's subject. A dry water well is 1.5 m in radius and 5.0 m deep. In order from lowest to highest, the fifth resonant frequency of this well is closest to ... I know that it is an open-closed system, but how would we ...

*January 27, 2010*

**physis**

A dry water well is 1.5 m in radius and 5.0 m deep. In order from lowest to highest, the fifth resonant frequency of this well is closest to ... I know that it is an open-closed system, but how would we take into account the amplitude, which is the radius given for this ...

*January 27, 2010*

**Chemistry**

Assuming it behaves as an ideal gas, calculate the temperature of a sample of He whose molecules have an average translational kinetic energy of 1.14E-23 kJ/molecule.

*January 24, 2010*

**algebra**

Asked question wrong last time. New question with description of how to figure it out please. What is the value of 3t+7 given -2t+1 =3

*January 17, 2010*

**algebra**

What is the value of 3t+7 when you know -21t+1=3 I need to know how to figure this out not just the answer. Thank you

*January 17, 2010*

**social studies**

what is a nobleman

*January 10, 2010*

**Calculus**

im asking the rate of convergence as the order such h^2? h^3? etc

*December 11, 2009*

**Calculus**

Find the Rates of convergence of the following functions as h->0 lim h->0 sin h - hcosh ------------- = 0 h Find the Rates of convergence of the following functions as n->inf lim (Sin (1/n))^2=0 n-> inf

*December 11, 2009*

**algebra**

Qaud Forumula -b+-sqrt(b^2-4ac) / 2a 3x^2-2x-4=0 a = 3 b = -2 c= -4 -(-2) +- sqrt((-2)^2-4(3)(-4))/ 2(3) = 2 +- sqrt(52) / 6

*December 11, 2009*

**hca 270**

i have to do this and i have no idea im so confused i know to define but what is a real world example. and what are the fouec's and five pillars? im confused a little hint of help please The Four C’s and Five Pillars Directions: Consult Ch. 1 and the glossary of ...

*December 4, 2009*

**Physics**

Alcohol flows smoothly through a horizontal pipe that tapers in cross-sectional area from A1 = 41.9 cm2 to A2= A1/3. The pressure difference Δp between the wide and the narrow sections of the pipe is 11.1 kPa. What is the volume flow rate ΔV/Δt of the alcohol? ...

*December 1, 2009*

**Physics**

An object has a mass of 0.5 kg. It undergoes a simple harmonic motion. The amplitude of that motion is 0.07 m and the period is 0.31 s. What is the total energy of the object?

*December 1, 2009*

**math**

how do i find the local extrema for this graph. f(x)= x(e^x)

*November 18, 2009*

**Math**

If a circle has the radius of 6 and it is at the orgin, what are seven points on the circle. I already have four and I need three more. So far I have, (6,0) (0,6) (0,-6) and (-6,0). What am I missing. I also can't write any decimals for the points, but it can be expressed...

*November 17, 2009*

**math**

my teacher wants me to look up in the stock market how much was the price per share for Pier 1 Imports on March 31, 2009 and November 16, 2009. Where do i go to find this information?

*November 16, 2009*

**math**

is there a way to do this problem or do i have to just guess and check. because by guessing and checking, i can't find the right answer Name a function with the following characteristics: note: f prime means the first deriviative f is continuous over the reals, f(0)=0, F ...

*November 15, 2009*

**math**

is there a way to do this problem or do i have to just guess and check. because by guessing and checking, i can't find the right answer Name a function with the following characteristics: note: f prime means the first deriviative f is continuous over the reals, f(0)=0, F ...

*November 14, 2009*

**math**

find the number that makes the fractions equivalent 1/2=?

*November 12, 2009*

**math**

i am the one who asked the question

*November 11, 2009*

**chemistry**

Could someone explain dipole-dipole forces for me?

*November 6, 2009*

**5th grade Language**

So did we ever figure out if these answers from Ms. Sue are correct? I have this homework tonight and struggling with question #4.

*November 5, 2009*

**2nd grade**

what solids and liquids used i house

*October 29, 2009*

**Physics**

There is a 12mm high object that is 10 cm from a concave mirror with a focal length of 17 cm. (a) Where (B) How high, and (C) what type type is its image. For C i got real inverted and reduced but how do you do parts A and B

*October 22, 2009*

**Physics**

There is a 12mm high object that is 10 cm from a concave mirror with a focal length of 17 cm. (a) Where (B) How high, and (C) what type type is its image. For C i got real inverted and reduced but how do you do parts A and B

*October 21, 2009*

**english**

simple subject of this sentence Alex Tanner added a spoonful of vanilla

*October 14, 2009*

**social studies**

Prince Edward Island

*October 14, 2009*

**Physics**

What angle should you rotate a mirror so that a reflected ray rotates through 28 degrees. I got 20, but i am not sure, please help

*October 13, 2009*

**Algebra 1A**

HELP!!! Translate to an inequality. Use the variable x. The price of an amusement park ticket is greater than or equal to $12. The inequality is _ _ $ _. Simplfy your answer. Put the variable on the left side of the inequality. Than you!

*October 2, 2009*

**Home and Careers**

What are the seven areas or personal grooming?

*October 1, 2009*

**MATH**

Divide if possible 48/-8 select the correct choice below and fill in any answer boxes in your choice A.48/-8= B.The answer is undefined.

*September 26, 2009*

**Math**

Solve. 8x+4=4x+5= the solution is x= simplify your answer. Type an integer or fraction

*September 26, 2009*

**ECONOMICS**

The demand for gasoline is less elastic in the short run than in the long run. Which of the following is a reason for this? (A) If the price of gasoline is relatively high for a long time, consumers are more likely to buy more fuel-efficient cars. (B) In the short run, the ...

*September 14, 2009*

**Physics**

The freezing point depression of a .100 m solution of NaCl solution is .34C. Calculate the percent dissociation of NaCl.( Kf for water=1.86) Please help

*August 27, 2009*

**Physics**

There is a rod that is 55 cm long and 1 cm in radius that carries a 8 uC charge that is ditributed uniformly over its entire length. What would be the magnitude of the electric filed 4.0 mm from the ord surface, not near either? So far I have 2(8*10^-6)(9*10^9)/.55=261818 then...

*August 27, 2009*

**Chem**

When salt is spread on a snow-covered road at -2C, the snow melts. Though when the same amount of salt is spread on the snow covered road at -30C, nothing happens. Explain? Is this diue to beinf ionic, and nonvolatile vapor and volatile vapor pressure?

*August 25, 2009*

**Chem**

Which compound does not dissociate a. table sugar b. NaCl C. MgCl2 D. CaCl2 I say b becasue it dissociates 90%, right?

*August 25, 2009*

**Chem**

Wwhich compound does not dissociate? a. Table sugar

*August 25, 2009*

**Chem**

If you had a 5.55 M solution of NaCL that has a density of 1.025g/ml at 20C, what would the concentration be of the solution in molarity.I got .541 m am I right or my calculation totally off?

*August 25, 2009*

**Physics**

There is a rod that is 50cm long and has a radius of 1cm that carries a charge of 2uC distributed uniformly over its length. What would be the value of the magnitude of the electric field. (a) 4.0 mm from the rod surface, not either end So far I have 2(8*10^-6)(9*10^9)/.55=...

*August 25, 2009*

**Physics**

There is a rod that is 50cm long and has a radius of 1cm that carries a charge of 2uC distributed uniformly over its length. What would be the value of the magnitude of the electric field. (a) 4.0 mm from the rod surface, not either end So far I got E1/4density-2pie0r or E= 2(...

*August 25, 2009*

**Econ**

Suppose that the government decides to charge cola consumers an excise tax. Before the tax, 12 million cases of cola are sold every month at a price of $3.50 per case. After the tax, 6 million cases of cola are sold every month; consumers pay $4.00 per case and producers ...

*August 24, 2009*

**Physics**

There is an electric field in a certain region that is defined as E=axihat, a is N/C and x is defined by the position in meters. What is the volume charge density in the region. So far I did 32p=(32)(8.85*10^-12) I got 3.54*10^-10, where did I go wrong?

*August 20, 2009*

**Physics**

There is a figure with a +2.0 UC charge on the left and a -2.0 uC charge on the right. P is in the center between the two charges. They are 5.0 cm apart. 1) Find the electric field 5.0 cm to the left of P. 2) Find the electric filed 5.0 cm directly above P. 3) Find the ...

*August 19, 2009*

**Physics**

There is a proton that is at the origin and an ion at x1=6 nm. If the electric field is zero at x2= -3 , what is the charge on the ion? All I ahve for this is 2q/d^3=-e/x1^3 q=9*10^9 d=9 e=1.602*10^-19 x1=6 I get -2.7. They want an integer so i put up -3. What am I doing wrong?

*August 17, 2009*

**Physics**

There is a proton that is at the origin and an electron at the point x= 0.42nm and y=0.36nm. Find the elctric force on the proton for Fx and Fy. For my total force I got 7.53*10^-11N For my x direction I got 5.8 *10^-11N, and for my y dirction i got 5.1 *10^-11N. Where did I ...

*August 12, 2009*

**Physics**

There is a 85 uC point charge at the origin. What is the electric field at the point x= -45cm , y= 55cm. I am doing (-.45+.55)/(-.45^2+.55^2)^3/2 Where did I go wrong? I have to find the elctric point for the Ex and Ey.

*August 12, 2009*

**Physics**

A -3.5 uC charge experiences a 13N i hat electric force in a certain electric field.What would the force be for a proton experience in the same field? I amd doing this 13/-3.5=-3.7 then multiplying 1.6*10^19 where did i go wrong

*August 12, 2009*

**Physics**

There is a proton that is at the origin and an electron at the point x= 0.42nm and y=0.36nm. Find the elctric force on the proton for Fx and Fy. For my total force I got 7.53*10^-11N For my x direction I got 5.8 *10^-11N, and for my y dirction i got 5.1 *10^-11N. Where did I ...

*August 12, 2009*

**Physics**

There is a figure q1= 23 uC and q2= 16 uC. The force on q1 points in the -x direction. q1 is at (0,1) q2 is at (2,0) q3 is at (2,2) What is the magnitude of the force on q1? I am doing this (9*10^9)(23*16)(-4ihat)7^3 where did i go wrong?

*August 12, 2009*

**Econ**

Suppose a new type of pest, which is immune to existing pesticides, attacks the wheat crop. As a result, at a given quantity of clothing, the economy is able to produce fewer bushels of wheat than before the attack of the new pests. Adjust the PPF curve to show the economy'...

*August 11, 2009*

**Physics**

There is a proton that is at the origin and an electron at the point x= 0.42nm and y=0.36nm. Find the elctric force on the proton for Fx and Fy. For my total force I got 7.53*10^-11N For my x direction I got 5.8 *10^-11N, and for my y dirction i got 5.1 *10^-11N. Where did I ...

*August 11, 2009*

**Physics**

The Earth is surrounded by an electric field on its surface that points toward the center of the Earth with an average magnitude of 150 N/C. If there is an electron that is released in vacuum at the Earth’s surface, what will the acceleration due to the Earth’s ...

*August 10, 2009*

**math**

The ratio of staff to patients at Lakeview is 8 to 7. If total staff plus patients is 1575 people, how many staff are at Lakeview? help me get started on how to solve this

*July 20, 2009*

**math**

The ratio of staff to patients at Lakeview is 8 to 7. If total staff plus patients is 1575 people, how many staff are at Lakeview? help me get started on how to solve this

*July 20, 2009*

**English**

Hi, I need a title for my essay it is about woman being unhappy with their marriages. I wanted to call it dissatisfying Marriages. If you have a better title that you can offer, please do.

*July 7, 2009*

**Science**

What electrical appliance uses a 1.5 Volt battery?

*May 8, 2009*

**World War 1**

HOW MANY SHIPYARDS DID WE HAVE DURING WORLD WAR 1?

*May 5, 2009*

**language(involes songs)**

MAYBE A KIND OF FASTISH AND PANICKY SONG BECAUSE THERE IS A FIRE.

*May 5, 2009*

**science**

I think it is rice because popcorn can not fit together without crumpling and rice sticks really well together.

*May 5, 2009*

**4th grade vocab**

The hiking territory was 500 sq. feet.

*May 4, 2009*

**division**

You could ask your teacher and she could probably teach you. or your parents.

*May 4, 2009*

**??????**

its ok!

*May 4, 2009*

**??????**

what site?

*May 4, 2009*

**??????**

to give you a hint of which one it is, the second letter is an o.

*May 4, 2009*

**??????**

Thank you!!!!!

*May 4, 2009*

**??????**

also what were they than?

*May 4, 2009*

**??????**

Dang! But ok.

*May 4, 2009*

**??????**

What was the main trainning center during world war 1

*May 4, 2009*

**4th grade geography**

Ok thanks!

*April 30, 2009*

**4th grade geography**

which website is for The Great Pyramid?

*April 30, 2009*

**4th grade geography**

Thanks for your help everybody!

*April 30, 2009*

**4th grade geography**

what country and year were these manmade stone constructions built? The Great Wall Mount Rushmore Itaipu Dam Stonehenge and The Great Pyramaid

*April 30, 2009*

**College Algebra**

Another one if you can help Solve the formula for the indicated variable. N=a+b Ln (c/d) for c

*April 30, 2009*

**MATH 1111**

i do not know how! But i like your Name!!!!! (same as mine!)

*April 30, 2009*

**MATH 1111**

College Algebra help with logarithms! Ln (x-4) - Ln (x+1) = 16 How do I take natural logs?? it's a study guide question for our final exams

*April 30, 2009*

**math**

range is the numbers that is the first number and the last number so you would say the range is 5 to 10. The mode is the number that appears the most.

*April 30, 2009*

**Science**

Frogs and lizards

*April 29, 2009*

**Science**

I do not think any animals live in blackberry bushes.

*April 29, 2009*

**DRBOB**

ok!

*April 29, 2009*

**DRBOB**

whats your question?

*April 29, 2009*

**Math**

i think it is 25. Both your friend and you are wrong because when you divide 30 by half you get 15.So 15+10=25.

*April 29, 2009*

**Geography**

I have been looking for a while for a good map! So Thank you SSSSOOOOO much!!!!!!!!!!

*April 29, 2009*

**Geography**

Thank you Ms.Sue!

*April 29, 2009*

**Geography**

Where can i go to get a map of the world during the civil war?

*April 29, 2009*

**4th grade**

The first Sammy is not me!

*April 27, 2009*

**4th grade**

those two Sammys are not just me!

*April 27, 2009*

**4th grade**

Sammy is very smart and i agree with Anna too!

*April 27, 2009*

**4th grade**

I think Anna is right too.

*April 27, 2009*

**ALgebra**

what would the x intercepts be for this equation? y=x^2-3x-4 thanks.

*March 6, 2009*