Tuesday

September 27, 2016
Total # Posts: 195

**Chermistry**

5.20 moL

*August 31, 2010*

**math**

explain how you can find the sum 25+59 without using pencil and paper or a calculator. then find the sum

*August 23, 2010*

**math**

write two equations that prove the associative property is not true for the subtraction

*August 23, 2010*

**math**

the trainers took a count of the animals at the zoo. there are both birds and four legged mammals at the zoo. the trainers counted 550 feet and 155 animals on their first trip through. How many birds and mammals are there?

*August 9, 2010*

**algebra**

Put the equation in the form ax2 + bx + c = 0. Enter exponents using the caret ( ^ ). For example, you would enter 4x2 as 4x^2. 4x^2+5x=(3x-1)^2-3x^2

*June 17, 2010*

**Science**

Winds in the Northern Hemisphere curve to the right and winds in the Southern Hemisphere curve to the left. This is known as the a. Jet Stream b. Wind c. Weather Pattern d. Coriolis Effect

*May 25, 2010*

**pre algebra**

the kiel family has an annual income of $46,ooo. If they buget 6% for missions, how much will they give to missionaries each year?

*May 19, 2010*

**Algebra**

Hi, I have had to factorise the equation x^2 + x - 30 = 0, which I think I have worked the answer out as x =-6, x =5? I now need to explain how I can use this answer to solve the equation 4x^2 +4x -120 =0 Any advice?

*May 12, 2010*

**geometry**

if a regular octagon has a perimeter of 264 centimeters, what is the measure of each interior angle and each side?

*February 24, 2010*

**the outer planets**

I am working on a crossword that asks what is 4 times the diameter of Earth. Can you help with this?

*February 18, 2010*

**cheristin school**

9x8x7x6x5=

*January 27, 2010*

**math**

How do you build an array for 4x7?

*January 25, 2010*

**11th grade math**

x values sould be 4.75 and 8.06........ so your answers are 4.8 and 8.1

*January 21, 2010*

**Trig**

Give the exact value of the trigonometric function: arctan(√3)

*January 21, 2010*

**Precalculus**

Got it! Thanks.

*January 3, 2010*

**Precalculus**

Solve the inequality and sketch the solution: -3≤ 2(x+4)< 14

*January 3, 2010*

**world geography**

what is the formal an funticnal region in washington

*November 16, 2009*

**pre algebra **

Okay Times the demominators 5 and 3 = 15 What do i time 3 by to get 15 = 5 so -2/3 becomes -10/15 What do I times 5 by to get 15 =3 so -4/5 becomes -12/15 Now I have -10/15 + -12/15 = -22/15 Can't be simplified so the answer is -22/15 or -1 and 7/15 I have a homeworkhelp ...

*November 9, 2009*

**Math/Biz Math**

Argh too much!!! Who has time to read all this!

*November 9, 2009*

**Math**

(-5a)^2 = 625 but -5a^2 = -125 when a=5 Why? order of operations in this one (-5a)^2 you do what is in inside teh () first which is (-5 times 5) = (-25) and square that = 625 But in this one -5a^2 you so the a^2 first which is 5^2 = 25 then you have -5 times 25 which is -125 1...

*November 8, 2009*

**Math**

I am cofussed is this one question or three?

*November 8, 2009*

**Algebra**

Okay I am considering, do you have a question?

*November 8, 2009*

**math**

Math Homework ;)

*November 8, 2009*

**Math for educators**

I think the reason is asking you this because your question makes little sense. When looking for domain and range you are usually working with ordered pairs (x,y) (3,4). Unless you mean range as in Central Tendency, but taht wouldn't have a domain.

*November 8, 2009*

**Math/algebra**

Looks right to me :)

*November 8, 2009*

**math**

Times 250000 by 0.15 which is 37500 Look us up on Google SecondTeacher

*November 7, 2009*

**8th grade Clinton Junior High School**

Divide powers means you subtarct the exponent Example (^ means "to the power of") 5^4 divided by 5^2 = 5^4-2 = 5^2 Secondteacher (look it up on Google) Trev

*November 5, 2009*

**Math - Trigonometry**

Verify the following: 1. cos x/(1-sinx)= sec x + tan x 2. (tanx+1)^2=sec^2x + 2tan x 3. csc x = )cot x + tan x)/sec x 4. sin2x - cot x = -cotxcos2x

*October 13, 2009*

**physics**

A person jumps from a window 57 meters high and is caught in a firefighter's net which stretches 0.6 meter. To the nearest tenth of a m/s^2, what is the magnitude of the person's acceleration in the net?

*September 27, 2009*

**Algebra 1A**

How to write an expression representing 25 more than the product of a number and 15?

*September 26, 2009*

**math (percent)**

Both Sam and Sylvia work at a bookstore. During a sale, Sam sold 15 percent more books than Sylvia. If Sam sold 69 books, how many books did Sylvia sell? A. 60 C. 54 B. 58 D. 50 B

*May 15, 2009*

**accounting**

thanks

*May 14, 2009*

**accounting**

Which of the following would you use to record your checking account transactions? A. A check stub or check book registry B. A deposit slip C. A signature card D. Checks or drafts A

*May 14, 2009*

**health**

The Genetic Information Nondiscrimination Act applies to A. life insurers. C. disability insurers. B. health insurers. D. accident insurers. I think (B)

*April 20, 2009*

**9th grade Algebra**

2x+y=10

*March 18, 2009*

**Chemistry**

Assume that you had 15 nuts (N) and 10 bolts (B). How many N2B molecules could you make by screwing two nuts onto each bolt? There are two nuts for each bolt. We have 15 nuts so we can make 7. I'm supposed to "Show all calculation for full credit." Is there ...

*March 5, 2009*

**Math/Geometry**

Actually, I'm using the same formula as you. I searched for formulas yielding Pythagorean triples and it listed a few,yours being one. I'm not getting any results though..

*February 25, 2009*

**Math/Geometry**

A correct answer will yield me an "A" all SEMESTER, so help is appreciated Question: Can you find a pythagorean triple whose nonhypotunese legs ARE NOT divisible by 12? That is to say that triples like 3,4,5 would not work because a(3)xb(4)=12/12=1 meaing that their ...

*February 25, 2009*

**Math/Geometry**

A correct answer will yield me an "A" all SEMESTER, so help is appreciated Question: Can you find a pythagorean triple whose nonhypotunese legs aren't divisible by 12? Whatever the answer, yes or no, it must be proven.

*February 25, 2009*

**Chemistry**

I don't know why these aren't posting? Can someone please explain this to me? The maximum number of electrons that can occupy ONE f orbital is: A. 14 B. 6 C. 2 D. 18 E. 10 Wrong Points Earned: 0/2 Your Response: A

*November 18, 2008*

**Chemistry *Urgent***

The maximum number of electrons that can occupy ONE f orbital is: A. 14 B. 6 C. 2 D. 18 E. 10 Wrong Points Earned: 0/2 Your Response: A I don't know why that didnt post anything... But can't a f orbital hold 14 electrons? according to my professors online quiz it can...

*November 18, 2008*

**Chemistry *Urgent***

The maximum number of electrons that can occupy ONE f orbital is: A. 14 B. 6 C. 2 D. 18 E. 10 Wrong Points Earned: 0/2 Your Response: A Seriously can't an f orbital hold 14 electrons?

*November 18, 2008*

**chem**

What is the energy of one mole of photons with a wavelength of 375 nm? (h = 6.63 x 10-34 J • s, N = 6.02 x 1023) A. 5.30 x 10-19 J B. 2.39 x 105 J C. 2.66 x 10-18 J D. 5.30 x 105 J E. 1.60 x 106 J

*November 18, 2008*

**chem**

Thanks guys, brain fart i guess. I wasn't putting together the E=7.26e-19

*November 18, 2008*

**chem**

What is the wavelength of light associated with the radiation of 7.26 x 10-19 J/photon? (h = 6.63 x 10-34 J • s)

*November 18, 2008*

**Chemistry**

A 230-gram sample of metal at 82 degrees centigrade is added to 632 grams of water at 14.4 degrees centigrade in an ideal calorimeter. The final temperature of the system (water and metal) is 22.8 degrees centigrade. What is the heat acapacity of the metal. The specific heat ...

*October 26, 2008*

**Chemistry**

What is the quantity of heat evolved when 111.9 grams of H2O(l) is formed from the combustion of H2(g) and O2(g)? H2(g) + 1/2 O2(g) --> H2O(l) Delta Ho = -285.8 kJ

*October 26, 2008*

**science**

Carbon. Wikipedia it.

*September 30, 2008*

**Chemistry**

To assay silver content in an alloy, a 13.38 g sample of alloy was dissolved in nitric acid. The addition of 0.53 molar sodium chloride resulted in the precipitation of silver chloride. If the alloy were pure silver, what volume of sodium chloride is needed to precipitate the ...

*September 30, 2008*

**Chemistry**

Thank You SOOO much!

*September 30, 2008*

**Chemistry**

What volume of 0.7 molar sodium hydroxide is needed to completely neutralize 90.04 mL of 0.4 molar sulfuric acid?

*September 30, 2008*

**Chem**

That is what I though, but that is all the question asks... I am assuming they just mean decomposition. ???

*September 30, 2008*

**Chem**

The anions sulfite, carbonate and sulfide produce what gassesrespectively?

*September 30, 2008*

**Chemistry**

I got C4H5. And it says that is wrong. Can someone help me on this one?

*September 29, 2008*

**Chemistry**

I don't know why that didn't post... Complete combustion of a 0.20 mole sample of a hydrocarbon, CxHy, yields 0.80 mol of CO2 and 1.0 mol of H2O. What is the empirical formula for the hydrocarbon? A. C2H5 B. C4H5 C. C4H8 D. C4H10 E. C3H8 I got an answer of C4H5. Is ...

*September 29, 2008*

**Chemistry**

9. Complete combustion of a 0.20 mole sample of a hydrocarbon, CxHy, yields 0.80 mol of CO2 and 1.0 mol of H2O. What is the empirical formula for the hydrocarbon? A. C2H5 B. C4H5 C. C4H8 D. C4H10 E. C3H8 I have C4H8 Correct?

*September 29, 2008*

**Chemistry**

(138 g H2SO4)/(98 g H2SO4/mol)/(8 moles S8)x(256 g S8)= 45.1 g S8 Should have been: (138 g H2SO4)/(98 g H2SO4/mol)/(8 moles {{{H2SO4}}})x(256 g S8)= 45.1 g S8 I typed S8 by mistake instead of H2SO4, I had H2SO4 on my paper. Thanks for your help.

*September 29, 2008*

**Chemistry**

Ok, I think I might have just had a lightbulb moment. (138 g H2SO4)/(98 g H2SO4/mol)/(8 moles S8)x(256 g S8)= 45.1 g S8 =45.1g S8 <---can someone confirm????

*September 29, 2008*

**Chemistry**

Elemental sulfur can form sulfur trioxide when burned. When sulfur trioxide is dissolved in water, it yields sulfuric acid. The net reaction is shown. What mass of sulfur is needed to yield 138 grams of sulfuric acid. S8(s) + 12O2(g) + 8H2O(l) --> 8H2SO4(l) Help?

*September 29, 2008*

**math**

8,426. Let x represent the hundreds digit. My thousands digit is twice my hundreds digit --> Thousands= 2X Hundreds= X My hundreds digit is 2 more than my tens digit. --> Tens= X-2 Ones= Y The sum of my tens and ones digit is my thousands digit. --> 2X=(X-2)+Y My tens...

*September 29, 2008*

**networking**

there is no way to cause windows xp to retain permissions when an object is copied tor moved to another ntfs volume.

*September 16, 2008*

**grammar**

What is verb in the following sentence? There are many boats at the campsite.

*September 9, 2008*

**Chem**

2NH3 <--> NH4+ + NH2- In liquid ammonia the reaction represented above occurs. In the reaction, what does the NH4+ act as? A catalyst? And acid & a base? the conjugate acid of NH3? The reducing agent? The oxidizing agent?

*April 22, 2008*

**Chem**

Which of the following produces a coordinate complex? H2SeO4 + 2Cl- + 2H+ --> H2SeO3 + Cl2 + H2O S8 + 8O2 --> 8SO2 3Br2 + 6OH- --> 5Br- + BrO3- + 3H2O Ca+2 + SO4-2 -->CaSO4 PtCl4 + 2Cl- --> PtCl6(-2)

*April 22, 2008*

**Precalculus**

nevermind i got it. Thanks anyway.

*March 13, 2008*

**Precalculus**

.5=e^(-20t) I am assuming this involves logs but we did't really learn logs. Anyone care to walk me thru with a calculator. Have the Ti-83

*March 13, 2008*

**Physics**

They Are Vertical with the ball in between them.

*February 6, 2008*

**Physics**

A small plastic ball with a mass of 6.50x10^-3 kg and with a charge of +0.150x10^-6 C is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, whit the tread making an angle of 30 degrees with respect to the vertical. The ...

*February 6, 2008*

**managerial econ**

DAMON is Working on it for you so stop posting it!

*February 6, 2008*

**physics**

A small plastic ball with a mass of 6.50x10^-3 kg and with a charge of +0.150x10^-6 C is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, whit the tread making an angle of 30 degrees with respect to the vertical. The ...

*February 6, 2008*

**Physics**

A small plastic ball with a mass of 6.50x10^-3 kg and with a charge of +0.150x10^-6 C is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, whit the tread making an angle of 30 degrees with respect to the vertical. The ...

*February 6, 2008*

**Physics**

Velocity I think if it is a distance vs. Time graph, If it was a Velocity vs. Time graph then Acceleration.

*February 6, 2008*

**Physics**

A small plastic ball with a mass of 6.50x10^-3 kg and with a charge of +0.150x10^-6 C is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, whit the tread making an angle of 30 degrees with respect to the vertical. The ...

*February 6, 2008*

**Physics**

Two charges are placed between the plates of a parallel plate capacitor. One charge is +q1 and the other is q2= +5.00x10^-6 C . The charge per unit area on each plate has a magnitude of sigma=1.30 x 10^-4 C/m^2. The force on q1 due to q2 equals the force on q1 due to the ...

*February 6, 2008*

**Physics**

Two charges are placed between the plates of a parallel plate capacitor. One charge is +q1 and the other is q2= +5.00x10^-6 C . The charge per unit area on each plate has a magnitude of sigma=1.30 x 10^-4 C/m^2. The force on q1 due to q2 equals the force on q1 due to the ...

*February 6, 2008*

**Physics**

I did it the way you said to solve it and I got a number different than the correct answer.

*November 18, 2007*

**Physics**

A 2 kg pendulum bob is hanging from a 30 cm long piece of string. If the pendulum bob is allowed to move in circular motion in a horizontal plane, determine the tension in the string if the angle the string makes with the vertical is 37 degrees. Need Step by step solution.

*November 18, 2007*

**Physics**

How would I convert that to m/s

*November 18, 2007*

**Physics**

You have a 30g quarter on an old LP turntable at a radius of 30 cm from the turntable's center. If the coefficient of Friction between the coin and the turntable is 0.6, at what speed will the coin slide off the turntable? Hint: this is a circular motion problem. To find ...

*November 18, 2007*

**Physics**

NVM you are relating GPE for Horizontal to KE of Horizontal.

*November 18, 2007*

**Physics**

Is it vertical vs. Horizontal energy to get the Acceleration?

*November 18, 2007*

**Physics**

An object is swinging from a point that is horizontal compared to the lowest point the object will reach (where the rope is vertical). If the length of the rope is 2 meters and the mass of the object is 30 kg, what is the tension in the rope at the bottom of the swing? Need ...

*November 18, 2007*

**Chemistry**

Correction: Under part a, that is supposed to be 25.0 grams hydrogen peroxide.

*September 16, 2007*

**Chemistry**

N2H4+2H2O2->N2+4H2O a) If you start with 23.0 g of hydrazine and 23.0g of hydrogen peroxide, which substance is the limiting reactant? b) How much of the other chemical is left unreacted? c) Assuming 75% yield, how many grams of water are formed? I have no idea how to do ...

*September 16, 2007*

**English**

I need to find the subject and the verb 1.In the cockpit the pilot checked the instruments. (pilot is the subject and checked is the verb?) 2.From the kitchen drifted the delicious aroma of spaghetti sauce. (drifted is the verb and aroma is the subject?) 3. In the distance we ...

*September 12, 2007*

**English**

Oh, Okay-we could see, so we is the subject?!

*September 12, 2007*

**English**

2. pilot is the subject? 4. we is the verb and car is the subject? From the kitchen drifted the delicious aroma of spaghetti sauce. (drifted is the verb and aroma is the subject?)

*September 12, 2007*

**English**

1.onions and tomatoes is the verb? 3. flowed is the verb? Couple more questions-I don't quite have it- 1. Into the store burst the excited shopper. (burst is the verb and shoppers is the subject?) 2.In the cockpit the pilot checked the instruments (instruments is the ...

*September 12, 2007*

**English**

Okay-so were is the verb? 3 more questions-just to make sure! 1.In the garden the onions and the tomatoes sprouted among the other vegetables. (Vegetables is the subject and sprouted is the verb?) 2.The porpoises and dolphins leaped through the hoop. (porpoises and dolphins is...

*September 12, 2007*

**English**

Here's another one- Several photographs and candles were on the mantel. I think photographs and candles is the subject and several is the verb?

*September 12, 2007*

**English**

I think the subject is messanger and the verb is rode?

*September 12, 2007*

**English**

I think rode is the verb and messenger is the subject?

*September 12, 2007*

**English**

I need to find the verb and the subject in this sentence and I am having trouble- 1. On and on, through the night, rode the messenger.

*September 12, 2007*

**Power**

I want absolute, cosmic power. Can anyone point me in the direction of some useful resources? 6 ways: 1) Avoid becoming a teacher. 2) Watch "Pinky and the Brain." Form your own plan to take over the world. 3) Freeze yourself for several million years. Wake up when ...

*June 1, 2007*

**Math/Financing**

I need help with a math problem. If someone finances an item at an apr rate of 17.99% interest, and pays all charges off in 2 months, what will the total amount paid for the item be. Assuming there is no annual fee and the minimum finance charge is $2.00

*October 22, 2006*