Saturday

December 20, 2014

December 20, 2014

Total # Posts: 248

**Chemistry**

I was using Ea in joules/mol, thank you for your help!
*December 2, 2014*

**Chemistry**

But the answer is supposed to be 2.2x10^-2
*December 2, 2014*

**Chemistry**

I've used the two-point form of the Arrhenius equation and I keep ending up with 9.8x10^-3 for k2
*December 2, 2014*

**Chemistry**

The aquation of tris(1,10-phenanthroline)iron(II) in acid solution takes place according to the equation: Fe(phen)32++ 3 H3O++ 3 H2O →Fe(H2O)62++ 3 phenH+. If the activation energy, Ea, is 126 kJ/mol and the rate constant at 30°C is 9.8 × 10-3 min-1, what is ...
*December 2, 2014*

**physics**

This would not happen in household wiring because of circuit breakers.
*September 13, 2014*

**physics**

R=Ro+Ro*a*(T-To) (2Ro-Ro)/Ro=a*(T-To) we want to double resistance. For example if our initial resistance is 10, we want R to be 20, therefore R=2Ro. (2Ro-Ro)/Ro=1, so 1/alpha=T-To divide by alpha (1/alpha)+To=T add To to both sides So To=20C. Alpha from my old old physics ...
*September 13, 2014*

**Physics**

You serve a tennis ball from a height of 2.1 m above the ground. The ball leaves your racket with a speed of 19.2 m/s at an angle of 5.3° above the horizontal. The horizontal distance from the court's baseline to the net is 11.83 m, and the net is 1.07 m high. Neglect ...
*September 8, 2014*

**Chemistry**

Just out of curiosity, how would you figure out the delta g if you didn't know the delta h? I don't think it is possible, is it? And also, can you explain how you knew it was exothermic?
*May 27, 2014*

**Chemistry**

When magnesium hydrogen carbonate reacts with sulfuric acid, would you consider that an exothermic reaction because it forms CO2 (gas)?
*May 27, 2014*

**math**

(4.3 x 10-8) (1.5 x 109) Compute and write in scientific notation
*March 17, 2014*

**Math**

If a metal bar at a temperature of 20 degree celcius is dropped in boiling water how long will it take for the bar to reach 98 celcius at a rate of 2 degrees per second
*February 21, 2014*

**math**

$8000 is shared between 3 schools in the ratio of 2:3:5, how much will each school get?
*February 9, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
*February 5, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
*February 5, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
*February 5, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
*February 5, 2014*

**chemistry**

I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
*February 5, 2014*

**Algebra, 0110 HELP!**

Including 5% sales tax, an inn charges $210.00 per night. Find the nightly cost at the inn before tax is added. (a) Write an equation to model the problem. Let x represent the nightly cost before tax. (b) Solve the equation to find nightly cost before tax. (Note: Your answer ...
*September 7, 2013*

**Math**

Denise took a total of 80 calls on her shift at work today. Of those 80 calls, 55% were resolved, 15% escalated to a supervisor, and 10% required that a technician be sent out to the customer's house. What is the total number of calls that Denise resolved on her shift ...
*August 20, 2013*

**physics**

After sliding down a snow-covered hill on an inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.8 m/s. Miranda runs after her at a velocity of +4.8 m/s and hops on the inner tube. How fast do the two of them slide across the snow together on ...
*June 30, 2013*

**Math (HELP PLZ)**

Thanks, I wasn't so sure at first, I guess I just forgot
*June 3, 2013*

**Math (HELP PLZ)**

The glass in Lee’s window needs replacing. It is 30 inches wide and 24 inches long. What is the area (A) of the glass Lee should buy? A. A = (2 × 30) + (2 × 24) = 108 in. B. A = 30 × 24 = 720 in2 C. A = 2 × (30 + 24) = 108 in2 D. A = 30 + 24 = 54 in.
*June 3, 2013*

**comp**

Which of the following contains a pronoun error? (Points : 2) Neither Jane Austen nor Mary Shelley is known for their poetry. As the curtain rises, everyone in the audience settles into his or her seat and waits for the play to begin. The book sale that is held in the spring ...
*May 28, 2013*

**Math**

A fence is 20 ft long. it has posts at each end and at every four feet along its length. how many fence posts are there? Draw a picture.
*May 20, 2013*

**math**

what is the y-intercept of the line of 35.00 + 8.00x if the slope is 8
*April 26, 2013*

**Computer (Visual Basic)**

You are in the process of selecting the BackColors and ForeColors for you new application. When you originally learned to use Visual Studio, you were only aware of one of the palettes that was available to you, but your developer colleague informs you that you have more ...
*April 9, 2013*

**Math**

Distributive property 9x
*March 31, 2013*

**Advanced Algebra**

Write the equation for the depreciation of the value of your car for t years at 14% per year.
*March 28, 2013*

**launguage**

Read the following excerpt from “All Together Now”: What can parents do? We can put our faith in young people as a positive force. I have yet to find a racist baby. Babies come into the world as blank as slates and, with their beautiful innocence, see others not as ...
*March 12, 2013*

**Programming (Visual Basic)**

Im seem to be having trouble with this Exercise. Would you mind helping me please? How do i do this Visual Basic program? Instructions say: Fix the following code: Dim dblRegularPay As Double Dim dblOvertimePay As Double intRegularPay = 783.87 intOvertimePay = 105.92 lbl ....
*March 5, 2013*

**algebra**

Is v=s2 a quadratic relation?
*March 3, 2013*

**Physics**

Roughly how high could a 340 K copper ball lift itself if it could transform all of its thermal energy into work? Assume specific heat for copper equal to 386 J/kg·K.
*March 3, 2013*

**Physics**

Roughly how high could a 340 K copper ball lift itself if it could transform all of its thermal energy into work? Assume specific heat for copper equal to 386 J/kg·K.
*March 3, 2013*

**Math**

2/3/3= A. 2/9 B. 1/9 C. 1 D. 2
*March 2, 2013*

**Math**

a banner requires 1 1/2 sections of plastic. How many banners can be made from 12 sections of plastics? A.7 B.8 C.9 D.15
*March 2, 2013*

**English**

so is it sell or bargain?
*March 2, 2013*

**English**

So your saying the answer is Bargain?
*March 2, 2013*

**English**

buying and selling
*March 2, 2013*

**English**

Are you sure thats correct because someone told me the answer is Sell or Bargain
*March 2, 2013*

**English**

Which of the following words is different from the others? A. Sell B. Trade C. Barter D. Bargain
*March 2, 2013*

**health**

A client comes in and asks for a pregnancy test. What do you do?
*February 22, 2013*

**hardware**

A driver is a blank that interacts with a particular device or special (frequently optional) kind of software?
*February 20, 2013*

**Computer (Hardware Support)**

What types of devices use USB ports?
*January 17, 2013*

**Finance**

A company wishes to issues bonds with a coupon rate of 5%. The company wishes to raise 100 million dollars net of commissions (5% of total sales). Each bond has a face value of $1,000 and matures in 10 years. Interest is to be paid semi-annually. Using the following conditions...
*December 12, 2012*

**physics**

An object is located 16.8 cm in front of a convex mirror, the image being 11.5 cm behind the mirror. A second object, twice as tall as the first one, is placed in front of the mirror, but at a different location. The image of this second object has the same height as the other...
*November 14, 2012*

**physics**

Two parallel plate capacitors are identical, except that one of them is empty and the other contains a material with a dielectric constant of 4.2 in the space between the plates. The empty capacitor is connected between the terminals of an ac generator that has a fixed ...
*November 13, 2012*

**Calculus**

An open top bos with a square base is to be constructed from 192 sq ft of material. What should be the dimensions of the box if the volume is to be a maximum? What is the maximum volume?
*October 29, 2012*

**Physics**

need help with this problem :/ A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45o with the field because the coil has...
*October 28, 2012*

**physic**

A charge of -2.73 μC is fixed in place. From a horizontal distance of 0.0465 m, a particle of mass 9.50 x 10-3 kg and charge -9.56 μC is fired with an initial speed of 97.2 m/s directly toward the fixed charge. What is the distance of closest approach?
*October 11, 2012*

**MATH URGENT**

I MEAN AN EVEN SORRY!
*September 11, 2012*

**MATH URGENT**

SRRY I MEANT AN EVEN INTEGER HAS BEEN REMOVED LOL
*September 11, 2012*

**MATH URGENT**

AN INTEGER IS RANDOMLY SELECTED AND PERMANENTLY REMOVED FROM THE SET OF 100 INTEGERS (1,2,3,...100). WHAT IS THE MINIMUM NUMBER OF TIMES THIS REMOVAL PROCEDURE WILL HAVE TO BE DONE TO GUARANTEE THAT AN INTEGER HAS BEEN REMOVED?
*September 11, 2012*

**math *IMPORTANT**

oops 0 is 0 111111 its 6 tally marks
*September 10, 2012*

**math *IMPORTANT**

HENRY PROGRAMMED A CALCULATOR TO RANDOMLY DISPLAY A DIGIT FROM 0 THROUGH 9. THE RESULTS OF THE FIRST 50 DISPLAYS ARE SHOWN ON THE TABLE BELOW. WHAT IS THE POSITIVE DIFFERENCE BETWEEN THE THEORETICAL PROBABILITY AND EXPERIMENTAL PROBABILITY FOR GETTING A 9 IF EACH DIGIT HAS AN ...
*September 10, 2012*

**MATH *IMPORTANT**

well i get that but i just dont c what the answer is becuase it takes forever to do this problem u have to use numbers ubtil you have them all. i am in mathcounts and it is totally competition i cant be up doing a problem like that isnt there a possible way to do it faster and...
*September 10, 2012*

**Calculus**

Find the maximum area of a rectangle that lies above the x axis and below y=9-x^2
*June 27, 2012*

**Calculus**

Find the maximum and minimum product of 2 numbers who sum is 5
*June 27, 2012*

**Calculus**

If y= (x^2+20)/(x-4) Find all critical Numbers. After get f' i got the answer -5/4. What did i do wrong or is that the critical number?
*June 27, 2012*

**math**

If y= (x^2+20)/(x-4) Find all critical Numbers. After get f' i got the answer -5/4. What did i do wrong or is that the critical number?
*June 27, 2012*

**recreation travel**

Sorry I was not more clear. The airline has stated that A container can be carried but must not exceed 158cm in total. eg. LxWxH The container I need to take is a tube that must be 118cm long. I need to know what diameter the tube can be to meet the overall total of 158cm. Thanks
*June 14, 2012*

**recreation travel**

I need a tube that is 118cm long. The total allowance is 158cm by Multiplying the LxWxH. What circumference can the tube be.
*June 14, 2012*

**Physics**

If you could reach absolute zero then? A) The system falls into quantum ground state B) The system will have an entropy of zero C) Molecules will not overlap, D) Particles will continue to move E) There is still zero-point energy Are all of these true?
*June 1, 2012*

**college math**

Celsius= 5/9*(Fahrenheit-32) Celsius= 5/9*(72-32) Celsius= 22.22 degrees celsius
*May 29, 2012*

**Geometry**

The height of a parallelogram is 10 feet more than its base. If the area of the parallelogram is 120 square feet, find its base and height.
*April 18, 2012*

**Geometry**

How many different integer values of n satisfy the inequality 1/13 < 2/n < 1/10? F. 1 G. 2 H. 3 J. 4 K. 5
*April 16, 2012*

**math**

238
*April 16, 2012*

**Physics 30**

A point charge q=+4.7nC is placed at each corner of an equilateral triangle with sides of 0.21m in length. a) What is the magnitude of the electric field at the midpoint of the three side of the triangle? b) Is the magnitude of the electric field at the centre of the triangle ...
*April 5, 2012*

**statistics**

0.4108 0.6892
*March 29, 2012*

**Chemistry**

How much heat is required to warm 1.50 kg of sand from 20.0 C to 100.0 C?
*March 20, 2012*

**science**

A proton (mass m = 1.67 multiplied by 10-27 kg) is being accelerated along a straight line at 2.2 multiplied by 1015 m/s2 in a machine. The proton has an initial speed of 2.4 multiplied by 107 m/s and travels 3.8 cm. (a) What is its speed? m/s (b) What is the increase in its ...
*January 20, 2012*

**algebra**

sorry that answer was wrong tis is the right one 3x(43+82/3)*(879/615=y78)
*January 20, 2012*

**algebra**

54x3y
*January 20, 2012*

**geometry**

4 square root 56y8
*January 19, 2012*

**calculus**

Solve the following differential equation: f"(x)=sinx, x(0)=0, x'(0)=1
*December 6, 2011*

**psychology**

In psychology, the study of personality focuses on: change. stability. external factors. learned factors
*November 25, 2011*

**geometry**

a large square has sides of 24 units, midpoints of its sides are connected to create a smaller square. what is the area of the smaller square
*October 30, 2011*

**Math **

1,5,10,10,5,1
*October 27, 2011*

**Math **

1,10,10,1
*October 27, 2011*

**3rd grade math**

venn diagram circle a numbers:838,848,868,878 circle b numbers:403,509,600,702 What number would you write where the circles overlap?
*October 27, 2011*

**Physics**

A projectile is fired from the origin with an initial velocity V₁=100m/s at an angle θ₁=30⁰. Another is fired from a point on the x-axis at a distance x₀=60m from the origin with initial velocity V₂=80m/s at an angle of θ₂. It is ...
*September 22, 2011*

**BUSINESS**

1.Nordstrom creates an open atmosphere, in which every associate’s sales figures are made available to everyone else. Explain the positive impacts.While this is intended to foster creative tension, how might it lead to unhealthy destruction?
*September 15, 2011*

**MIS**

what is WCA?
*September 10, 2011*

**Linear programming**

Yes, thank you so much.
*June 26, 2011*

**Linear programming**

Riverside Oil Company in eastern Kentucky produces regular and supreme gasoline. Each barrel of regular sells for $21 and must have an octane rating of at least 90. Each barrel of supreme sells for $25 and must have an octane rating of at least 97. Each of these types of ...
*June 26, 2011*

**EMT-Basic**

the answer i would say has to be reassuring him that you are going to take good care of his wife.
*June 25, 2011*

**Chemistry**

When 0.5963g of a sample containing NaNO2 and some inert material is allowed to react with excess HSO3NH2, the volume of N2 gas produced is measured. The volume of N2 gas corrected to 298.15K and 100kPa is calculated to be 0.146L. Find the mass percent of NaNO2 in the sample ...
*May 25, 2011*

**Chemistry**

NaNO2 + HSO3NH2 = NaHSO4 + H2O + N2
*May 25, 2011*

**psychology**

Actually I got it. Its psychoanalytic, humanistic, and behavior. So the question is describe three psychological models of mental illness (psychoanalytic, humanistic, and behavior) include etiological explanation and the principle therapeutic modality that evolved from the model
*May 17, 2011*

**psychology**

The problem is I can't find the name of each models
*May 17, 2011*

**psychology**

None of the links explain three models of mental illness
*May 17, 2011*

**psychology**

I have trouble understanding whats the three psychological models of mental illness include etiological explanation and the principle therapeutic modality that evolved from the model. Can anyone help me? Thanks
*May 17, 2011*

**Physics**

A gatling gun fires at a rate of 2000 rounds per minute. If the bullets travel at a speed of 800m/s, how far apart are the bullets?
*May 1, 2011*

**Math**

4x2squared +9 \3-(8+3)
*February 14, 2011*

**english**

no thats all it gave me and om stumpted because thats the same thing i came up with
*January 3, 2011*

**english**

A transitive verb with a direct object is in the ___ voice. a.active. b.passive. c.subjunctive.
*January 3, 2011*

**english**

they sort of help but there to long for me to read right now
*January 3, 2011*

**english**

The verbs to do , to have , and to be are verbs that can be used 1.as a main verb. 2.as an auxiliary verb. 3.as either a main verb or an 4.auxiliary verb.
*January 3, 2011*

**chemistry**

UGH! I've been working on this problem for about an hour now for my test tomorrow at WMU. No luck. =( My guess? Impossible. =P
*November 15, 2010*