Sunday

April 26, 2015

April 26, 2015

Total # Posts: 133

**Chemistry**

Calculate the change in entropy (in J/K) when 61.4 g of nitrogen gas is heated at a constant pressure of 1.50 atm from 25.8 ºC to 92.8 ºC. (The molar specific heats are Cv is 20.8 J/(mol-K) and Cp is 29.1 J/(mol-K) .)
*March 31, 2015*

**Chemistry**

How do I get the V1
*March 31, 2015*

**trigo**

A ship sails N 27°10' E for 39 km and then turns N 67°50' for 85 km. What isad the distance and the bearing of the ship from the starting point? >>>So, I have a sketch of one triangle(not a right triangle, then drew 3 right triangles all over it then ...
*January 15, 2015*

**Biology**

What is this final stage of cellular respiration called where the most ATP molecules are made?
*November 25, 2014*

**Chemistry **

I have 3 Fe (s) + 4 (H2O) (g) reacts with FeO4 (s) + 4 H2 (g) How many g of steam and iron must react to produce 375 g of magnetic oxide Fe3O4 ? I need help trying to figure out how to write the equation please
*October 27, 2014*

**BUS100**

THE APPROACH STEP OF SELLING PROCESS ATTEMPTS TO :
*October 15, 2014*

**statistics**

Wages and salaries make up only part of a total compensation. Other parts include paid leave, health insurance, and many others. In 2007, wages and salaries among manufacturers in the United States made up an average of 65.8% of total compensation. To determine if this changed...
*July 20, 2014*

**chemistry**

29.8 ml of ethanol (density = 0.789 g/ ml) initially at 9.9 degree celsius is mixed with 33.8 mL of water (density = 1.0 g/mL) initially at 27.8 degree celcius in an insulated beaker. Assuming that no heat is lost, what is the final temperature of mixture? How do I start this ...
*June 22, 2014*

**statistics**

It has been suggested that the rate of forgetting (coded as normal vs. fast) for word lists often used in psychological experiments may depend on the type of memory test employed, either free-recall or recognition. What is the best way to test this hypothesis? a. regression b...
*May 3, 2014*

**Calculus**

Can you tell me if im doing this right? Find the volume of the region obtained by revolving the area below about the line x=3. y=x3, x=2, y=0 v=pi[2,0] (x^3)^3dx= pi[2,0] x^9 v=pi/10 x^10(2,0)= 1024/10 pi
*March 11, 2014*

**Calculus**

Can someone help me with finding the derivative of this function? y = -( csc x)2 (cos-1(1-x2))
*March 11, 2014*

**ASCC**

a car moving at 25m/s undergoes an acceleration of -2.3m/s. calculate a) the time needed to stop this car and b) the distance the car will travel before stopping.
*March 6, 2014*

**Algebra**

Thank you so much!
*March 4, 2014*

**Algebra**

Mr. Bailey mowed his yard in 90 minutes. His son Roy mows the yard in 75 minutes. How long will it take them if they work together (using 2 lawn mowers)? How to set up an equation? Thank you.
*March 4, 2014*

**basic algebra**

Thank you very much for all your great help! Once again, thank.
*March 4, 2014*

**Algebra**

Thank you.
*March 4, 2014*

**Algebra**

Bill drives his car 10 mph faster on the way home from work than he does going to work in rush hour. If it takes him 1 hrs. going and half an hour returning, how far away is his work?
*March 4, 2014*

**physics**

what is the mass of a vehicle traveling at 25 km/hr with a kinetic energy equal to 1 x 10 to the 4th power J?
*February 11, 2014*

**mental health counseling**

Authentic and performance assessments strive for greater realism and complexity of tasks under the premise that real-life problems can often be solved ______________.
*November 24, 2013*

**math**

Lane French had a bad credit rating and went to a local cash center. He took out a $100 loan payable in two weeks at $115.
*November 12, 2013*

**chemistry**

You dissolved 450.0 g of sugar (C12H22O11) in 150 mL of water. The density of water is 1.00 g/mL a. calculate the molarity of the solution b. calculate the molality of the solution
*November 7, 2013*

**CHEMISTRY**

In my lab report, I am asked to "Find the solubility of Ca(OH)2 in H2O as the temperature increases. Explain (in terms of energy) the reasons for this trend." From what I have found, Ca(OH)2's solubility goes down, but I have no idea why! It isn't a gas... it...
*October 26, 2013*

**Chemistry (URGENT)**

Oh my gosh, thank you SO MUCH Dr. Bob! You are a life saver.
*October 25, 2013*

**Chemistry (URGENT)**

Hello! Does anyone know where to find the solubility of Ca(OH)2 in water as temperature changes? I need this information to answer the discussion in a lab report.
*October 25, 2013*

**ap history**

to what extent did populists continue to focus on grievances of earlier movements?
*September 16, 2013*

**life orientation**

provide recommendations on how to address substance abuse
*May 21, 2013*

**Math**

19. A family takes a car trip. They travel for an hour at 80 km/h and then for 2 hours at 40 km/h. Find the average speed. (Hint, Remember to consider the total distance and the total amount of time.)
*April 26, 2013*

**calculus**

Suppose that x=x(t) and y=y(t) are both functions of t. If x^2+y^2=26 and dx/dt=−2 when x=1 and y=5, what is dy/dt? help??????
*April 15, 2013*

**Math**

x+(x+2)+(x+4)=39 because the first side is x, the next side has to be 2 more than x, and the third 4 more than x 3x+6=39 take it from here
*January 3, 2013*

**Math**

x is measure of one angle 2x-21 is measure of other x+2x-21=90 3x-21=90 3x=111 you go from here
*January 3, 2013*

**Math**

There might be an easier way but here how I did it. 4x(.05)+.10x=2.40 .2x+.10x=2.40 .3x=2.40 divide both sides by .3 x=8 so ther are 8 dimes and 32 nickels
*January 3, 2013*

**math**

show 7 two different ways
*December 31, 2012*

**Mathvo -**

i think it means xi less then or equal to -2
*December 13, 2012*

**Mathv**

4. Graph the inequality: x ≤ –2 (1 point)
*December 13, 2012*

**Division of Fractions**

18 divided over 3/5 =18 x 5/3
*December 3, 2012*

**calculus**

Compute each of the following limits if they exist. lim 3x^(2)-x-2 x->2 lim (x^(2)+x-6)/(x-2) x->2
*October 26, 2012*

**educational research**

I so overwhelm and lost at the moment. Summarize and complete an annotated bibliography of at least ten (10) scholarly sources that pertain to your research topic. This annotated bibliography should be a minimum of five pages in length, excluding title and reference pages. ...
*October 1, 2012*

**Economics**

A B
*September 9, 2012*

**chemistry**

7629899.9kl By bad
*September 9, 2012*

**chemistry**

7329899.9kl
*September 9, 2012*

**Chemistry**

A buffer system contains 0.25M NH4+ and 0.19M NH3. pka of NH4 is 9.25. How many moles of NaOH must be added to 1.00L of this solution to increase the pH to 9.25?
*July 19, 2012*

**financial management**

show me how to calculate current ratios, long-term solvency ratios, contribution ratios
*March 28, 2012*

**financial management**

show me how to work a forecast personnel expenses & total revenues using weighted moving averages & moving averages using 3 fiscal years
*March 28, 2012*

**physics**

Supertank has engine exerting a 75x10 cube N, Force against water drag at 40x10cubeN, Calculate tensions in tugs cable, Supertank is 1piont5x10eight kg 30 degrees vertical pull, Acceleration 2x10negative3 m/s?
*March 2, 2012*

**science**

How plant and animal life dependent on the water cycle?
*November 22, 2011*

**Math prediction**

how to add the following -94+(-19)
*November 18, 2011*

**finding math**

find the decimal notation for the fracton 3/10
*November 18, 2011*

**Learning Math**

why is it when 9x+x= 10x are we adding the x? Please help me to understand
*November 18, 2011*

**Learning Math**

Please solve 9x+x
*November 18, 2011*

**physical**

. On Earth the Mars rover had a weight of 9800 N. What will be its weight on mars where the acceleration due to gravity is 4 m/s
*October 16, 2011*

**Math**

Aluminum hydroxide suspension 15 mL is ordered four times per day. The pharmacy sends a bottle labeled 320 mg/5mL. How many milligrams will the patient receive per day?
*September 21, 2011*

**May**

Aluminum hydroxide suspension 15 mL is ordered four times per day. The pharmacy sends a bottle labeled 320 mg/5mL. How many milligrams will the patient receive per day?
*September 21, 2011*

**algebra**

Solve, 0.7x+4 is equal to or less than 1.1x-7 Simplify your answer. Type and inequality symbol; then type an integer or a decimal. The solution is {x x ___ ____}
*July 28, 2011*

**Physics 2**

Suppose, in the figure below, a 0.90-m rod experiences a 1.2-T magnetic field and the hand keeps it moving to the right at a constant speed of 3.5 m/s. If the current in the circuit is 0.040 A, what is the average power being delivered to the circuit by the hand?
*June 11, 2011*

**Chemistry**

A copper coil is placed in a solution of silver nitrate, the reaction proceeds and in time silver crystals form and the colution of copper nitrate is produced. What is the complete raction .
*June 6, 2011*

**Math**

it takes 5 hr for 8 cooks to prepare the food for a wedding rehersal dinner how long will it take 9 cooks?
*June 4, 2011*

**PAP Chemistry **

Net Ionic Equation of : NaOH(aq) + CaBr2(aq)
*May 22, 2011*

**math**

solve and show how it explained 5n+10+1-3n
*March 21, 2011*

**math**

show how to explain answer to p-8p
*March 21, 2011*

**Math**

A stick 80 centimeters long makes a shadow that is 50 centimeters long. At the same time of the day, the shadow of the tower is 25 meters long. How high is the tower?
*February 27, 2011*

**Physics**

A wire 3.00 m long and .450 mm2 in cross-sectional area has a resistance of 41.0Ω at 20 degrees C. If its resistance increases to 41.4Ω at 29.0 C, what is the temperature coefficient of resistivity?
*February 7, 2011*

**math**

bayside insurance offers two health plans. under plan A, giselle would have to pay the first 160 of her medical bills, plus 25% of the rest. under plan B, giselle would have to pay the first 180, but only 20% of the rest. for what amount of medical bills will plan B save ...
*December 9, 2010*

**Biology**

Thank You :)
*December 5, 2010*

**Biology**

If a heterozygote is crossed with a recessive individual, what % of their offspring will be recessive (have light hair)?
*December 5, 2010*

**physics**

On Earth the Mars rover had a weight of 9800 N. What will be its weight on mars where the acceleration due to gravity is 4 m/s 2 ?
*December 5, 2010*

**Algebra**

I am great at math but for some reason can not wrap my brain around Algebra for the world! Please Help!! Im stumped! Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -3x – 5y = 61 7x – ...
*November 17, 2010*

**algebra**

A dehydrated patient needs a 2.6% saline IV. Unfortunately, the hospital only has bags of 8% and 2% saline solutions. How many liters of each of these solutions should be mixed together to yield 2 liters of the desired concentration?
*November 17, 2010*

**CHEMISTRY**

1)If 36 mL of KMnO4 solution are required to oxidize 25 mL of 0.02932 M NaC204 solution, what is the concentration of the solution? 2)A Certain brand of iron supplement contains FeSO4-7H2O with miscellaneous binders and fillers. Suppose 22.93 mL of the KMn04 solution used in ...
*October 27, 2010*

**Science**

What are two potential hazards with oil use?
*October 17, 2010*

**Math**

What do you think?
*October 17, 2010*

**Algebra, explain how to please**

Can someone explain to me how to solve -14=2/5(9-2b) It would be greatly appreciated thank you
*October 17, 2010*

**Algebra**

How would I solve -32=8/7(3w-1) I have no clue.. ._. These problems stress me out
*October 17, 2010*

**Algebra**

Where did the four come from?
*October 17, 2010*

**Algebra**

How would I solve: 1/3(D+3)=5 I know you need to find the recipicile, but I have no idea how to solve this.
*October 17, 2010*

**Chemistry**

A solution contains the following ions: Hg2(2+) and Fe(2+). When potassium chloride is added to the solution, a precipitate forms. The precipitate is filtered off and potassium sulfate is added to the remaining solution, producing no precipitate. When potassium carbonate is ...
*October 1, 2010*

**Math**

Input, 0,1,2,3 output: 5,7,15,44 What is the Domain and What is the Range? How would I figure this out? Can anyone explain on how they found them?
*September 18, 2010*

**Math**

Explain how you would use a number line to round 148 to the nearest ten.
*September 13, 2010*

**Algebra 1**

thanks so much!!
*September 5, 2010*

**Algebra 1**

Multiply (5sqrt5-10sqrt 6)* (3sqrt5+6sqrt6)
*September 5, 2010*

**Algebra 1**

subtract (8 sqrt 125) - (7 sqrt 5)=
*September 5, 2010*

**Math**

3) Explain how the laws of exponents work with rational exponents and give at least one example of an expression containing rational exponents... Please help.. I can't find the answer to this anywhere..
*August 5, 2010*

**Math**

okay so the answer i came up with is 4m^20 Is that right? Thanks so much for your help.
*July 19, 2010*

**Math**

ohh sorry it is (2m)^16 why are you using n?
*July 19, 2010*

**Math**

(2m)^4 * (2m)16
*July 19, 2010*

**chemistry (WEBWORK)**

thanks its right
*July 17, 2010*

**chemistry (WEBWORK)**

Use the labels (CV+, –OH, CVOH, , Ea (activation energy), & G) to complete the reaction potential energy profile below. More than one answer is possible for some spots. a. (Use i, ii, iv, etc. for your answer) b. (Use i, ii, iv, etc. for your answer) c. (Use i, ii, iv, ...
*July 17, 2010*

**CHEMISTRY (WEBWORK)**

SPARTAN: Use the information from question #1 to answer the following. A. Which two orbitals from CV+ and –OH will overlap creating the C-O bond in CVOH? ______ (Use i, ii, iv, etc. for your answer) B. Which of the following accurately shows the orbital interaction that ...
*July 17, 2010*

**chemistry**

a, b, b, a
*July 13, 2010*

**algebra**

find the domain of the function g(x) = 4 ______ 6 - 7x
*July 8, 2010*

**FINANCE**

Life for Kids Company, a small producer of plastic swimming toys, wants to determine the most it should pay to purchase a particular ordinary annuity. The annuity consists of cash flows of $700 at the end of each year for 5 years. The firm requires the annuity to provide a ...
*March 23, 2010*

**Physics**

I've tried that, but the program I'm using still says that that is incorrect.
*February 5, 2010*

**Physics**

A rifle has a mass of 4.73 kg and it fires a bullet of mass 13.6 g at a muzzle speed of 829 m/s. What is the recoil speed of the rifle as the bullet leaves the gun barrel? So far, I've got (using p for momentum) p=p, so massXchange in velocity of the bullet will will equal...
*February 5, 2010*

**algebra**

-1x2-4x+12=0
*February 4, 2010*

**latin**

Cras , vos quod vestri sanctimonialis mos have lost severus orsa of juvenis. Is what I think it is, but it'd be better if you checked your resourced to make sure.
*December 10, 2009*

**ECONOMICS**

I hear ya! Thanks.
*April 8, 2009*

**Economics**

Okay, Any response on my question?
*April 8, 2009*

**ECONOMICS**

ARE THE 3 BASIC CHARACTERISTICS OF THE ECONOMIC PERSPECTIVE SUPPLY, DEMAND AND EQUILIBRIUM OR PRICES, INCOMES, AND QUANITITIES. I BELIEVE THEY ARE SUPPLY, DEMAND AND EQUILIBRIUM, BUT NOT SURE.
*April 8, 2009*

**Statistics**

Suppose that the number of customers who enter a supermarket each hour is normally distributed with a mean of 540 and a standard deviation of 150. The supermarket is open 14 hours per day. What is the probability that the total number of customers who enter the supermarket in ...
*February 13, 2009*