Tuesday

October 21, 2014

October 21, 2014

Number of results: 46,343

**social studies**

An unintended consequence of World War II was the creation of the nation of Israel in order to A. Provide a buffer zone between the West and Communist East. B. Establish a Jewish homeland. C. Create a refuge for Germans who lost their homes during World War II. D. Give Great ...
*January 30, 2012 by anonymous*

**math**

There are 5 options on the dessert menu at a restaurant. Erin and Ellen like all of the choices equally, so they each choose a dessert at random from the menu. What is the probability that Erin will choose apple pie and Ellen will choose strawberry cheesecake for dessert? ...
*April 24, 2013 by re*

**Chemistry**

I can not determine the answer for this problem...can someone please help me? Determine the number if moles of MgO that form from the reaction of 4.4 moles of O2 in the following unbalanced reaction: Mg + O2 ----> MgO The balanced equation is: 2Mg + O2 -----> 2MgO a. 1.1...
*September 10, 2009 by Jessica *

**chemistry correction**

1. Which two elements react vigorously with each other? A: Chlorine and lithium B:Chlorine and potassium C:iodine and lithium D:iodine and potassium my answer is B 2. which statement about electronegativty is correct. A: Electronegativity decrease across a period. B:...
*March 11, 2010 by Richard*

**Chemistry**

The question is "the reaction CO + SO3 <=> CO2 + SO2 has two possible mechanisms. If the rate law for this reaction is rate=k[SO3] which mechanisms is correct? which step in THAT mechanisms is the slow step? and the mechanisms are: mechanism 1 CO + @ -> CO@ SO3 + CO...
*June 5, 2011 by Kat*

**chemistry**

A certain first order reaction has a rate constant of 3.75x10^-2 s^-1 at 25.0C. What is the value of k at 70.0C when the activation energy is 135 kj/mol? Would I use the formula K=Ae ^-Ea/RT even though I have two temperatures?
*March 14, 2012 by student*

**Algebra**

How can you tell if an equation is quadratic and not linear? Quadratic equations contain a term that is squared (such as x^2). Linear equations are of the form y = mx + b, where m and b are constants. the variable in a quadratic equation must be squared ..but in linear ...
*July 11, 2007 by Jess*

**calc**

Consider a function f : {R}^2 \to {R}^2 for which f(4, -4) = (3, 3) and f{D}f(4, -4) = (5 4) (-3 0) <-- this is a 2x2 matrix The linear approximation of f at the point (4, -4) is (written as a row vector) is L(x,y) = (___,___) thanks, I have no idea where to. Since they ...
*April 11, 2010 by John*

**math**

I have a graph plotted which makes a straight line (linear graph) The points are as follows X , Y (.25, 0.593) (.50, 1.161) (.75, 1.762) (1.0, 2.348) I need to determine the linear range. Also, can Beer's Law be applied?
*September 3, 2010 by j*

**Calculus Help Please!!!**

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) ln(1 + x) ≈ x xE
*March 30, 2014 by Tim*

**grammar(correct version**

Choose the correct version of the sentence. The bird naive but curios-flew straight towards the cat.(my choice) The bird-naive but curious-flew straight towards the cat. Can someone please check for me
*April 18, 2012 by lilman*

**English**

Can you check these sentences for me and help me find suitable synonyms? 1) Julius Caesar has just come back from a victorious (or triumphant) battle against his rival Pompey 2) Where has J. just come back from? 3) Some of his followers plot (synonym) against him and try to ...
*January 24, 2010 by Franco*

**Physics**

Engineers are trying to create artificial "gravity" in a ringshaped space station by spinning it like a centrifuge. The ring is 170 m in radius. How quickly must the space station turn in order to give the astronauts inside it apparent weights equal to their real weights at ...
*February 11, 2011 by M*

**physics**

Engineers are trying to create artificial "gravity" in a ringshaped space station by spinning it like a centrifuge. The ring is 120 m in radius. How quickly must the space station turn in order to give the astronauts inside it apparent weights equal to their real weights at ...
*March 15, 2011 by olga*

**Solving a system of linear Equations using Substit**

Suppose a school club publishes a newslettter. Expenses are 90 cents for mailing and printing each copy, plus 600 total for research and writing. The price of the neewsletter is a 1.50 per copy. How many copies of the newletter must the club sell in order to break even?
*February 22, 2011 by Tonnie*

**Chemistry**

Calculate the percent yield of iron if 950 g of Fe3O4 underwent the reaction shown in the chemical equation below and 533 g of Fe was isolated from the reaction mixture. Fe3O4 (s) + 2 C(s) ----> 2 CO2 (g) + 3 Fe(s) 1). 25.9% 2). 77.5% 3). 56.1% 4). None of the above. Based ...
*April 11, 2007 by Van jan*

**Angular acceleration**

A flywheel of 480 mm diameter is accelerated with an angular velocity of 0.4 rad/s^-2 from rest by an electric motor until it is rotating at 400 revs/minute. Calculate: a) the time of acceleration b) the linear speed of the rim of the flywheel My answer for (a) is 104.7 secs, ...
*January 21, 2007 by Jim (BIGEYE)*

**Ms.Sue NEED YOU HELP LANGUAGE ARTS URGENT!!!!!**

1. In a persuasive essay, the thesis statement should represent an opinion. (1 point) True False Multiple Choice 2. The most common structure of a persuasive essay is (1 point) order of importance. chronological order. problem and solution. 3. Which of the following is NOT a ...
*December 18, 2012 by Gabby*

**Chemistry**

In a reversible reaction, chemical equilibrium is attained when ? 1. Rate of the forward reaction is greater than the rate of the reverse reaction. 2. Rate of the reverse reaction is greater than the rate of the forward reaction, 3. Concentration of the reactants reaches zero ...
*March 9, 2011 by Jazmin F. *

**algebra**

The value, v, of a shopkeepers inventory software program is given by v= -1/2t+5, where t is the number of years since the shopkeeper bought the program. What is the program worth four years after it is 1st purchased. Plot the point with the given t-value, 4. I have made ...
*May 13, 2011 by anonymous*

**Psychology**

Can someone please tell me whether or not these answers are correct. Thanks! 1. Regarding the memory processes, incoming information is first _______, then stored, and finally the memories must be _______, or taken out of storage to be useful. a. retrieved; encoded b. encoded...
*November 19, 2011 by Marilyn*

**chemistry**

The first-order reaction, SO2Cl2 SO2 + Cl2, has a rate constant equal to 2.20 ~ 10-5 s-1 at 593 K. What percentage of the initial amount of SO2Cl2 will remain after 6.00 hours?
*September 27, 2010 by JOSEPH*

**CHEMISTRY**

The first-order reaction, SO2Cl2 SO2 + Cl2, has a rate constant equal to 2.20 ~ 10-5 s-1 at 593 K. What percentage of the initial amount of SO2Cl2 will remain after 6.00 hours?
*September 27, 2010 by JOSEPH*

**Chemistry**

What is the activation energy for a simple A->B fist order type of reaction with the following rate constants at different temperatures? Temp rate constant (k) 310K 1.77 x 10-1s-1 480K 3.22 x 10^2s-1
*December 7, 2011 by Kristi*

**Calculus Help Please**

let f(x)=(x-1)^2, g(x)=e^(-2x), and h(x)=1+ ln(1-2x) find linearization of f, g, and h at a=0 Lf(x)= Lg(x)= Lh(x)= graph f,g, and h, and their linear app. For which function is the linear app. best? for which is the worst? explain. the linear app. appears to be best for the ...
*April 2, 2014 by Ahmed*

**Biology Science**

Arrange the following in correct order in food chain- Fish,Plankton,Shark,Crab
*March 5, 2012 by Sweeny*

**CHEMISTRY**

Are these listed in the correct order of increasing average molecular speed? NH3<N2<CO2<SO2<Cl2 ???
*May 12, 2012 by John*

**Chemistry**

which of the following sets of elements is arranged in order of decresing electronegativity? O,S,As Cl, B, CL Br, Cl, P Be, C, O please explain correct answer
*February 23, 2014 by Lisa*

**BIOLOGY**

How to create a dichotomous key? I have an assignment on how to create a dictomoous key with this ten different things' Hornet, Leech,salamander,iguana,tulip plant,pig,paramecium,pinetree,housefly,MUSHROOM could someone help me with this
*September 11, 2010 by AMARI*

**algebra**

1 Solve the set of linear equations by the matrix method : a+3b+2c=3 , 2a-b-3c= -8, 5a+2b+c=9. Sove for a 2 4 7 3 2 Solve the set of linear equations by Guassian elimination method : a+2b+3c=5, 3a-b+2c=8, 4a-6b-4c=-2. Find a 1 4 5 -1 3 Solve the set of linear equations by ...
*January 14, 2013 by Mandung*

**psychology**

In psychology,correlation measure the strength of the link between two variables. It is also important to know that correlations do not show: a)the strength of the relationship b)causation c)the direction of the relationship d)what occurs between sets of observations IS B ...
*March 2, 2010 by vedrana*

**Physics**

A pair of eyeglass frames made of plastic with a coefficient of linear expansion of 1.30x10-4 (C ) -1 have circular lens holes of diameter 4.40 cm at room temp (20 C). To what final temperature must the frames be heated in order to insert lenses 4.42 cm in diameter? (Hint: ...
*November 30, 2013 by Angie*

**Physics**

A pair of eyeglass frames made of plastic with a coefficient of linear expansion of 1.30x10-4 (C ) -1 have circular lens holes of diameter 4.40 cm at room temp (20 C). To what final temperature must the frames be heated in order to insert lenses 4.42 cm in diameter? (Hint: ...
*December 1, 2013 by Angie Need Help ASAP*

**Algebra**

I am having trouble with this one Can someone please show me the steps, the pairs to plot and the asymptotic? Thank you in advance! Evaluate the logarithmic equation for three values of x that are greater than 2, three values of x that are between 1 and 2, and at x=2. Show ...
*June 16, 2010 by Kris*

**programming**

create a program that prompts the user for a number the returns the value on the main method after validation.Create a method that promts the user for input?
*April 11, 2013 by thabo *

**Chemistry**

50 mL of copper(II) sulfate reacts with 50 mL of sodium hydroxide. Their concentrations are 0.3 M and 0.6 M respectively. The temperature increased to 23.6 C from 23.4 C. Determine the enthalpy change for the reaction in kJ/mol of sodium hydroxide. Q=mcΔT =(50g + 50g)(4....
*March 3, 2013 by a Canadian*

**managerial economics**

Suppose the inverse market demand equation is P = 80 V 4(QA+QB), where QA is the output of firm A and QB is the output of firm B, and both firms have a constant marginal constant of $4. Firm B is the Stackelberg leader in this market. (a)State the reaction function for firm A...
*September 7, 2008 by jenny*

**math 115**

1.eleven applications for a certain position had the following ages. 32, 33, 25, 36, 48, 51, 28, 23, 54, 52, 45. sort them out in ascending order. 23, 25, 32, 33, 36, 45, 48, 51, 54, I picked 33 for the middle number to get the median is it correct? 2.clay is building a pen ...
*September 6, 2009 by Lea*

**Math Word Problems**

Citydog Screen Printers received two orders for a t-shirt designed for a math symposium. The first order was for 40 shirts at a total cost of $295 and the second order was for an additional 80 shirts at a total cost of $565. Each order included a shipping and handling charge. ...
*September 14, 2007 by Lisa*

**linear programming**

Brian Q Rourke, owner of The Horse & Hound Pub in Dublin, is preparing for St. Patricks Day, amd he must determine how much cider to stock. Brian sells three brands of cider on tap Murphys Blackton, and red Rye. The cost per gallon (to the pub owner) of each brand is as ...
*June 6, 2012 by uma*

**linear programming**

Brian Q Rourke, owner of The Horse & Hound Pub in Dublin, is preparing for St. Patricks Day, amd he must determine how much cider to stock. Brian sells three brands of cider on tap Murphys Blackton, and red Rye. The cost per gallon (to the pub owner) of each brand is as ...
*June 6, 2012 by uma*

**English**

We were asked to pick 3 literary elements and explain how they can be affected by setting. I have protagonists and antagonists as one, that they can change due to not being completely rounded just yet - basically in the sense that the characters kind of create themselves as ...
*January 9, 2014 by Me*

**Botany**

Choose the correct option: The strongest evidence in favour of DNA as genetic material comes from - 1) Griffith effect 2)Conjugation 3)Taylor's experiment 4)Caim's effect
*June 14, 2011 by Shivangi*

**Chem**

What is the enthalpy for the following reaction? overall: C2H4+H2O--->C2H5OH is -1411kJ correct??
*November 4, 2010 by Angel*

**chemistry**

Write down the correct mechanism for the reaction between 3-methyl-2-pentene and HCL?
*February 18, 2011 by ben*

**stats**

In each of the four examples listed below, one of the given variables is independent (x) and one of the given variables is dependent (y). Indicate in each case which variable is independent and which variable is dependent. I. Gas consumption; Miles driven II. Course grade; ...
*July 10, 2011 by Celest*

**amth/algebra**

can someone help me with simplification: 20/5 - 1/5 my first answer is 1/5 my second answer is 10 -5/5 but the answere I have to choose from are: (a) 20 - 55/5 (b) 20 - 5/5 (c) cannot be simplified (d) 1/55 which is correct and if I'm not where did I go ...
*July 29, 2007 by dee*

**Economics.**

What does, "What are two strategies might you employ in order to create and maintain a high demand for stained glass windows. Be sure to consider what would work best for your targeted customer base." mean? NOTE: My targeted customers are: In their middle to older age Any ...
*October 20, 2013 by Nicole*

**math**

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) 1/(1 + 2x)^5 ≈ 1 − 10x
*October 10, 2014 by jedidiah*

**SS8R: Robber Baron or Captains of Industry Project**

Create a PowerPoint about your Captains of Industry (min. 7 slides) I chosen Andrew Carnegie, John D. Rockefeller, and Cornelius Vanderbilt for me previous assignment (that's why I ask you those questions about them). Now I have to choose ONE OF THEM to do my project. In my ...
*November 1, 2012 by Laruen*

**O.CHEM -> PLEASE CHECK!!**

Arrange the compounds in the order of increasing boiling point ***(LOWEST first): 1) H3C-O-CH3 2) H2O 3) CH3CH2OH 4) CH3CH2SH I think the order should be: #1, 4, 3, 2 Arrange the following in order of increasing rate of reactivity with conc.HBr ***(LEAST first). a) ...
*March 12, 2008 by K*

**calcus/ math**

Nick has enough wire to construct a 100m of fence. he wish to use it to form three sides of a rectangular garden,one side is along his building. 1)What dimensions should be choose in order to enclose the largest possible area? 2)Verify the result thus obtained by graphical ...
*December 28, 2010 by Jessy*

**Chemistry**

time(s) 30 60 120 180 240 300 420 480 t(*c) 13.8 13.8 13.9 13.1 14.2 14.3 14.5 14.7 14.8 b. if t1= 24.5*c, T2= 1.5*C, tr= 23.6*c, and with the tf obtained from the plot, determine Ccal, in J/*C, if the procedure descrived in the laboratory is followed. 3.when 0.600g of metal ...
*April 14, 2011 by Daniel Medaris*

**Math Site**

Is there an online site that talks about Linear Relations thoroughly. Could you please post links to some. I tried going to mathisfun. c o m , because that is usually the only site which explains everything well and fits everything into my head; unfortunately, linear relations...
*April 19, 2010 by Sara*

**Statistics**

The following linear equation, y = b0 + b1x, is a regression line with y-intercept b0 and slope b1. Define These Terms 1) correlation coefficient 2) Linear regression equation
*May 19, 2011 by Leslie*

**Physics**

Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand 1.96 cm from the rotation axis.
*March 26, 2012 by Alex*

**Physics**

Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand 1.96 cm from the rotation axis.
*March 26, 2012 by Alex*

**Physics**

Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand 7.54 cm from the rotation axis.
*October 21, 2012 by Pat*

**statistics**

Given the following scatter diagram , the sample correlation coefficient r: Has a positive linear correlation Has a negative linear correlation. Has little or no correlation. Looks close to + 1.00
*August 19, 2010 by Karen*

**physics**

A soccer ball of diameter 32 cm rolls without slipping at a linear speed of 2.4 m/s. Through how many revolutions has the soccer ball turned as it moves a linear distance of 16 m?
*October 27, 2010 by linda*

**physics**

A soccer ball of diameter 30 cm rolls without slipping at a linear speed of 3.1 m/s. Through how many revolutions has the soccer ball turned as it moves a linear distance of 15 m?
*February 23, 2011 by Tin*

**physics**

A soccer ball of diameter 29 cm rolls without slipping at a linear speed of 3.6 m/s. Through how many revolutions has the soccer ball turned as it moves a linear distance of 18 m?
*October 5, 2011 by kat*

**Linear algebra**

Consider for every real number a the linear system of equations: { x +( a + 1 )y + a^2 z = a^3 { ( 1 - a )x +( 1 - 2a )y = a^3 { x +( a + 1 )y + az = a^2 b)Find the values of a for which the system has no solution, infinitely many solutions, and a unique solution
*April 27, 2014 by Elissa*

**math**

what does linear an nonlinear functions mean? I need help asap please i am begging you because i am a new student at this school and i don't get what the difference is between linear and nonlinear functions.
*May 2, 2014 by jayla*

**chemistry**

The reaction between 0.045 g of calcium with an excess of water was carried out in an ice calorimeter as used in this lab. The volume of water in the calorimeter decreased by 0.18 mL during the reaction a) Write the equation for the reaction which occurs. Is it a redox ...
*November 10, 2008 by Anonymous*

**chemistry**

A balanced equation that represents an overall cell reaction is shown. Choose the cell notation which corresponds to the electrochemical cell that is described by this equation. 2H2O(l) → 2H2(g) + O2(g) i dont get why the answer is this. How can OH- appear in both sides ...
*June 3, 2010 by eng*

**maths calculus**

A centre enters students for English levels one and two end test every year. Some take the paper based version, others online version. For planning purposes you need to assume trend patterns indicate that .the total number of entries each year is always more than 50 .the ...
*February 26, 2007 by jigna*

**Linear Programming**

OKay My question is: Two factories manufacture 3 different grades per paper. the company that owns the factories has contracts to supply at least 16 tons of low grade, 5 tons of medium grade, and at least 20 tons of high grade paper. It cost $1000 per day to operate the first ...
*October 16, 2009 by Deanna*

**chemistry**

Why are all diatomic molecules diatomic molecules linear, regardless of the number of valence electron pairs on the atom? i dont understand this question what is meant by linear?
*April 8, 2009 by lyne*

**math/linear equation**

Good morning. I have a question that I'm stuck on. I need to determine if the relationship represented is linear and if it is, then I need to write an equation for it. Help is deeply appreciated. For x- 2,4,7,10,12,20 For y- 5,7,10,13,15,23
*July 30, 2010 by jesup*

**Physics**

In my lab of linear expansion, I need to find out the coefficient of linear expansion. The data I got for an aluminum rod are initial length is 59.7cm, the change in length is 95mm, the change in temperature is 75.4 Celsius degrees. I converted 59.7cm to 0.597m, and 95mm to 0....
*June 13, 2011 by Lynn*

**Math - PreCalc (12th Grade)**

Which statement is true for any linear system of two equations in two variables? A) The system is independent if the slopes of the two lines are equal. B) The system is inconsistent if the y-intercepts of the two lines are equal. C) The system is independent if the graphs of ...
*March 20, 2014 by Shawna*

**chemistry**

follows first-order kinetics and has an activation energy of 244 kJ mol-1. At 684 K, k = 0.00000508 s-1. What is the half-life (min) for this reaction at 427 C ? Round your answer to 3 significant figures. I really dont know what to do
*November 19, 2010 by bobjahng2*

**Chemistry**

The reaction OH- + NH4+ = H20 + NH3 is kinetically first order in both reactants' concentrations. The rate constant is 2e10 1/M s. If 50 ml of .01 M NaOH is mixed with 50 ml of .01 M NH4CL, find the time required for the OH- concentration to reach 1e-4 M.
*March 19, 2014 by Anonymous*

**General chemistry**

The first-order reaction, SO2Cl2---> SO2 + Cl2, has a rate constant equal to 2.20 x 10^-5 s^-1 at 593 K. What percentage of the initial amount SO2Cl2 will remain after 6.00 hours?
*April 26, 2010 by hahaha*

**ANYBODY HERE?????????????????????????????????**

PLEASE ANSWER MY QUESTION! THANK YOU! WHAT IS A PLOT? A plot (in mathematics and engineering) is a graph. It geography, it is a piece of land. In a cemetery, it is a grave site. It can also be a covert plan of action or conspiracy. In English a "plot" can be the form a story ...
*December 23, 2006 by TANU*

**Chemistry**

For the reversible, one-step reaction A + B ARROW C + D, the forward rate constant is 35.9 1/(Mh) and the rate constant for the reverse reaction is 25.4 1/(Mh). The activation energy was found to be 33.0 kJ/mol for the forward reaction and 45.6 kJ/mol for the reverse ...
*June 13, 2012 by parker*

**Math**

Use a ruler to create a 6" x 8" rectangle. Cut rectangle on a diagonal. Use the two triangles to create four new shapes. List the most specific shape and its perimeter
*January 13, 2011 by Anne*

**Chemistry**

One enzyme- catalyzed reaction in a biochemical cycle has an equilibrium constant (K1) that is 10 times the equilibrium constant (K2) of a second reaction. If the standard Gibbs energy of the former reaction is - 300 kJ mol-1, what is the standard reaction Gibbs energy of the ...
*April 10, 2012 by harry*

**physics- electrodynamics**

can someone walk me through this --- you'd be a lifesaver a rectangular pipe running parallel to the z axis(- to +) has 3 grounded metal sides at y=0, y=a and x=0. the fourth side at x=b is maintained at a specified potential v0(y). a. Develop a general formula for the ...
*August 5, 2007 by jake*

**statistics**

In each of the four examples listed below, one of the given variables is independent (x) and one of the given variables is dependent (y). Indicate in each case which variable is independent and which variable is dependent. I. Rainfall; Crop yield II. Ability to concentrate; ...
*September 29, 2012 by Anonymous*

**english**

Are my solutions right?? 1. "There's someone knocking at the door! Who can it be at this time of night?" "___ Helen. She said she might come round to watch the midnight movie on TV." A: That's going to be; B: That'll be; C: It's due to be. I choose A and B 2."I've just ...
*October 26, 2012 by Minnie*

**Elem. Ed.**

Portfolios are a collaborative effort in that: A. children,teachers,and specialists can all choose samples to include in a portfolio. B. each item in the porfolio should be discussed with parents before it is included. C. teachers must have input from other teachers in the ...
*April 10, 2007 by Keisha*

**Chemistry**

I'm doing chemical equilibrium, and there's a question in my lecture notes. Can someone check my answers and tell me if i'm right or wrong? Thanks! The Kc expression for this reversible reaction: 3Fe(s) + 4H2O (g) --><-- Fe3O4(s) + 4H2 (g) is [H2]^4 / [H2O]^4 Am I ...
*September 10, 2010 by Riley*

**chemistry**

Calculate the cell potential for the following reaction as written at 51 degrees C, given that [Zn2+] = 0.837 M and [Sn2+] = 0.0180 M. Zn(s) + Sn^2+(aq) = Zn^2+(aq)+Sn(s) E = __ V Reduction Half-Reaction Standard Potential Ered (V) Zn2+(aq) + 2e → Zn(s) 0.76 Sn2+(aq...
*June 7, 2012 by Katherine*

**Chemistry**

Question asking about how enzymes affect the rate of a reaction. Check all that apply 1. They shift the reaction equilibrium towards the products. 2. They increase the concentration of the reactants. 3. They lower the activation energy of the reaction. 4. They decrease the ...
*February 20, 2013 by Patrick*

**chemistry**

10.0 grams of carbon dioxide and 20.0 grams of oxygen are mixed in a 50.0 L container at 30.0 degrees celcius. What is the pressure of this mixture in mm Hg? I defined my variables. so i had Mass=30.0g Volume=50.0L Temperature=303 Kelvin pressure=x. then i used PV*GFM=mRT. (x...
*March 18, 2008 by Miley*

**dog behavior**

please check answer thanks Modeling is a training technique that involves A. providing one dog as an example for another dog to follow B. giving positive reinforcement for correct behavior C. using dependent and independent variables in an experiment D. habituating a dog to a ...
*April 8, 2008 by Anonymous*

**science**

a) calculate the heat of reaction, in kilojoules, for the reaction: 2NO2(g) + 3H2(g)--->2NH3(g) + 2O2(g) b) is the reaction endothermic or exothermic? how can you tell? I will be happy to critique your work on this. You will have to look up the heats of formation.
*January 18, 2007 by michelle*

**math **

If you earn the grades of 81, 84, 78, 80 in four tests what should your final tests score be in order to have an average of 81%? .81x400=324 Need a total of 324 pts Test grades so far 81,84,78,80 = 323 324-323=1 You need at least one more point in order to have an average of ...
*September 9, 2009 by Anonymous*

**a**

For a fixed rate, a fixed principal amount, and a fixed compounding cycle, the return is an exponential function of time. Using the formula, , let r = 10%, P = 1, and n = 1 and give the coordinates (t, A) for the points where t = 0, 1, 2, 3, 4. Round your answer to the ...
*March 8, 2007 by Jade*

**science**

'the scale of a mercury-in-glass thermometer is linear. one such thermometer has a scale extending from -10 degrees Celsius to 110 degrees Celsius. the length of the scale is 240mm.' what is linear? what is meant when the question said the scale is linear? how do i calculate ...
*January 17, 2007 by minerva*

**Math**

A 12% solution and a 24% solution are to be mixed to create 80 mL of a 16% solution. How much of each should be used? Is the correct answer 53 1/3 L of the 12% solution and 26 2.3 of the 24% solution?
*February 12, 2013 by Alyonka*

**chem**

In a chemical reaction, A and B reacts to form D. C is the intermediate product of this reaction. Percent yield of the reaction A+B->C is 50% and the percent yield of the reaction C->D is 90%. How many moles of D can be produced when 14 moles of A and B react?
*October 5, 2014 by bekah*

**Spanish**

I'm doing my work but i don't get these three questions at all. Could you explain them as well? ★Which part of this sentence is not correct? Esta muchacha tan bonito es alta. A. Esta B. bonito ✔C. muchacha ★Choose the correct verb for tastes in the following...
*June 4, 2014 by Jamie *

**chemistry**

The following reaction is a single-step, bimolecular reaction: CH3Br + NaOH --> CH3OH + NaBr When the concentrations of CH3Br and NaOH are both 0.135 M, the rate of the reaction is 0.0070 M/s. (a) What is the rate of the reaction if the concentration of CH3Br is doubled? (b...
*March 24, 2012 by katie*

**chem hw**

Assuming equal concentrations, rank these aqueous solutions by their freezing point: Li2SO4, Li3PO4, SnCl4, NH4Br. (from highest freezing point to lowest freezing poinT) Is the order Li3PO4, Li2SO4, SnCl4, and NH4Br???????? If not what is the correct order?
*February 19, 2012 by Amy*

**Algebra2(check answers)**

Will someone please check my answers? 1)Ping is deciding what to choose for dinner from a menu. He can choose 1 of 4 pasta meals, 1 of 6 chicken meals, or 1 of 3 fish meals. How many ways can Ping choose a dinner meal? a)13<---- b)18 c)27 d)72 2) How many permutations are ...
*June 18, 2012 by Anonymous*

**Math**

Use differential, i.e., linear approximation, to approximate (125.4^(1/3)) as follows: Let f(x)=x^(1/3) . The linear approximation to f(x) at x=125 can be written in the form y=mx+b where m is: m=1/75 b=? How do I find b?
*July 19, 2008 by Blair*

**English**

Can someone help me with these questions please. Bret Harte "Plain Language from Truthful James" 1. What was the major theme in this poem? 2. What can we learn from the characters in the poem about the people of this time period. 3. What lesson can be learned from the plot if ...
*February 22, 2013 by bs*

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