Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 242

**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?

**Chemistry**

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

**math**

(4.3 x 10-8) (1.5 x 109) Compute and write in scientific notation

**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

**math**

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

**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 t...

**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 t...

**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 t...

**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 t...

**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 t...

**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 s...

**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 toda...

**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 t...

**Math (HELP PLZ)**

Thanks, I wasn't so sure at first, I guess I just forgot

**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.

**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 i...

**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.

**math**

what is the y-intercept of the line of 35.00 + 8.00x if the slope is 8

**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 choice...

**Math**

Distributive property 9x

**Advanced Algebra**

Write the equation for the depreciation of the value of your car for t years at 14% per year.

**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 d...

**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 .Tota...

**algebra**

Is v=s2 a quadratic relation?

**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.

**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.

**Math**

2/3/3= A. 2/9 B. 1/9 C. 1 D. 2

**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

**English**

so is it sell or bargain?

**English**

So your saying the answer is Bargain?

**English**

buying and selling

**English**

Are you sure thats correct because someone told me the answer is Sell or Bargain

**English**

Which of the following words is different from the others? A. Sell B. Trade C. Barter D. Bargain

**health**

A client comes in and asks for a pregnancy test. What do you do?

**hardware**

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

**Computer (Hardware Support)**

What types of devices use USB ports?

**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...

**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...

**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 frequen...

**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?

**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...

**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?

**MATH URGENT**

I MEAN AN EVEN SORRY!

**MATH URGENT**

SRRY I MEANT AN EVEN INTEGER HAS BEEN REMOVED LOL

**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?

**math *IMPORTANT**

oops 0 is 0 111111 its 6 tally marks

**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 ...

**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...

**Calculus**

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

**Calculus**

Find the maximum and minimum product of 2 numbers who sum is 5

**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?

**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?

**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

**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.

**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?

**college math**

Celsius= 5/9*(Fahrenheit-32) Celsius= 5/9*(72-32) Celsius= 22.22 degrees celsius

**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.

**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

**math**

238

**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 ...

**statistics**

0.4108 0.6892

**Chemistry**

How much heat is required to warm 1.50 kg of sand from 20.0 C to 100.0 C?

**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 k...

**algebra**

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

**algebra**

54x3y

**geometry**

4 square root 56y8

**calculus**

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

**psychology**

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

**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

**Math **

1,5,10,10,5,1

**Math **

1,10,10,1

**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?

**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 d...

**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?

**MIS**

what is WCA?

**Linear programming**

Yes, thank you so much.

**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 gasol...

**EMT-Basic**

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

**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 u...

**Chemistry**

NaNO2 + HSO3NH2 = NaHSO4 + H2O + N2

**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

**psychology**

The problem is I can't find the name of each models

**psychology**

None of the links explain three models of mental illness

**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

**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?

**physics**

.98

**Math**

4x2squared +9 \3-(8+3)

**english**

k

**english**

no thats all it gave me and om stumpted because thats the same thing i came up with

**english**

A transitive verb with a direct object is in the ___ voice. a.active. b.passive. c.subjunctive.

**english**

they sort of help but there to long for me to read right now

**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.

**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

**physics**

A 102.0 N grocery cart is pushed 13.0 m by a shopper who exerts a constant horizontal force of 54.0 N. If all frictional forces are neglected and the cart starts from rest, what is its final speed?

**physics**

a 0.1 kg mass is suspended at rest from a spring near the Earth's surface, the distance that the spring is stretched is measured to be 1.0 cm. What is the spring constant of the spring (remember the MKS units)? A mass of 2 kg is attached to a spring with constant 18 N/m. ...

**physics**

1. An object of mass m and initial speed v0 sliding on a horizontal frictionless surface encounters a frictionless ramp. To what vertical height will the object rise before coming to rest?

**physics**

An object of mass m=2kg travels up an incline to a vertical height of 3m. What is the work done on the object by gravity?

**physics**

Will the work done by friction on an object that moves through a positive displacement be positive of negative??? negative

**physics**

An object of mass m=2kg travels up an incline to a vertical height of 3m. What is the work done on the object by gravity?

**Physics**

0.17 kg point mass moving on a frictionless horizontal surface is attached to a rubber band whose other end is fixed at point P. The rubber band exerts a force F = bx toward P, where x is the length of the rubber band and b is an unknown constant. The mass moves along the dot...