Tuesday

February 9, 2016
Number of results: 53,661

**chemistry**

The rate constant for this first-order reaction is 0.320 s1 at 400 C. A--> Products How long (in seconds) would it take for the concentration of A to decrease from 0.830 M to 0.220 M?
*March 23, 2012 by Katie*

**Ap Chemistry**

Hi, I was wondering if you could possibly help me with this chem question. For the relatively slow decomposition of NOCL into NO and Cl2 according to the reaction below, it is known that the reaction is second order w/ respect to NOCl and that after 23.4 minutes that 75% of ...
*February 24, 2008 by Carlo*

**drawing**

a)One game in a state lottery requires you to pick 1 heart, 1 club, 1 diamond, and 1 spade, in that order, from the 13 cards in each suit. What is the probability of getting all four picks correct and winning $5000 b)If three of the four selections in part (a) are correct, the...
*November 8, 2010 by Matthew*

**Statistics**

a)One game in a state lottery requires you to pick 1 heart, 1 club, 1 diamond, and 1 spade, in that order, from the 13 cards in each suit. What is the probability of getting all four picks correct and winning $5000 b)If three of the four selections in part (a) are correct, the...
*November 8, 2010 by Matthew*

**chemistry**

A catalyst alters the rate of a reaction by a. changing the products in the reaction. b. increasing the activation for the reaction. c. always providing a surface on which the molecules react. d. providing an alternate pathway for the reaction. e. increasing the concentrations...
*February 24, 2012 by bob*

**chemistry**

A reaction proceeds by the following three-step mechanism with elementary rate coefficients, k. A + B → C k 1 C → A + B k -1 C → B + D k 2 (C is a chemical radical) (ii) By applying the Steady State Approximation determine the overall order of the reaction. (...
*July 30, 2015 by jay*

**Social Studies 7R - Bill of Rights Project**

I have a project for social studies that is due when we come back from break (4/16/12). Choose one of the projects listed below to show your understanding of one or more of the following Amendments 1, 2, 3, 4, 5, 6, 7, and 8 to the Constitution: I choose one and I can easily ...
*April 9, 2012 by Laruen *

**ELA**

what is plot structure and how do you do plot structure???
*February 13, 2013 by Dingbat*

**Math**

a.) Given that f(3)=5 and f'(x)=x/((x^3)+3), find the linear approximation of f(x) at x=3. b.)If the linear approximation is used to estimate the value of f(2.9), will it be an overestimation or underestimation? Show justification.
*March 16, 2012 by Devin*

**Calculus**

a.) Given that f(3)=5 and f'(x)=x/((x^3)+3), find the linear approximation of f(x) at x=3. b.)If the linear approximation is used to estimate the value of f(2.9), will it be an overestimation or underestimation? Show justification
*March 16, 2012 by Devin*

**Math**

For which table(s) of values in Exercises 3942 is the relationship linear? Tell how you decided. Write the equation for each linear relationship. x y 5 20 10 30 15 40 20 50 25 50 30 50
*September 8, 2009 by Anonymous*

**MAT101**

Why is it important to understand linear equations in business? What are some examples of how the concept of linear equations are used.
*March 2, 2010 by SEMA , WHY!!!!!!ME*

**linear systems**

for what values of k does the linear system below have: a) infinite solutions? b) one solution? c) no solution? 2/3x+y=16 kx+3y=48
*May 30, 2015 by Anonymous*

**Ms. Sue**

so, if my professor is asking for me to choose an ethnic goup to which I personally belong can I choose Hispanic/American? Yes, definitely.
*July 1, 2007 by ann*

**Math**

Choose 3 of the solids or 3 shapes. Write one generalization about all the figures you choose.
*November 21, 2011 by Dyna*

**Science**

How do I write the correct dissolution reaction for BaCl2
*September 16, 2015 by Morgan *

**Math**

Solve the equation. Choose the answer in simplest form. 4x = 8/7 a. 1/28 b. 1/7 c. 2/7 d. 7/2 Would the correct answer be b.
*April 8, 2015 by Jay*

**create a country**

I am supposed to create my own country and I need to come up with a creative name for it. Any ideas?
*December 18, 2007 by Jenna*

**math 116**

After solving a system of linear equations, how can you check your answer to determine whether it is correct? Demonstrate the process of checking an answer with an example.
*March 10, 2010 by earl*

**physics**

A large 22 cm marble rolls from rest down an incline. Its center has a linear acceleration of 2.5 m/s^2...What is the angle of the incline? It's angular accel is 22.7 rad/s^2 (if that helps and IF I'm correct!).
*October 24, 2010 by Anonymous*

**Algebra**

Guess the 4-digit combination. An X stands for a correct digit in its correct place in the combination and an O stands for a correct digit out of its corect order. 8256 OX Two of the four digits 8,2,5,6 appear in the final combination(one in the position given(for example 6 ...
*April 9, 2011 by Matt*

**Economis**

A demand curve that is unit elastic everywhere is a. linear and slopes downward b. linear and slopes upward c. vertical d. horizontal e. nonlinear
*January 19, 2010 by Rosa*

**maths-linear equation**

Draw the graph of the linear equation whose solutions are represented by the points having the sum of the coordinates as 10 units.
*March 11, 2013 by anoynomous*

**college algebra**

compare and contrast the ways in which solving a linear inequality is similar / dissimilar to solving a linear equation please explain
*September 9, 2014 by Debra*

**Biology**

Can someone help me correct my answers and help me answer the questions not answered yet? Electron Tansport 1. Whats is the purpose of this pathway? 2. Where does it take place Mitochandria 3. What does this reaction need to proceed? Hydrogen,NADH and FADH2 4. What is produced...
*January 27, 2008 by Bretagne*

**Art**

In the painting a seated soldier by Hippolyte Bellange the artist recognized the basic shapes in the figure on order to A. confuse the eye, making it difficult to draw. B. Record the various parts of the body accurately. C. Create a change in value D. Ignore proportion and ...
*October 13, 2014 by happy*

**Psychology**

This the question; Jung believed that the persona, anima/animus, and shadow were some of the archetypes that had evolved so completely that they could be considered separate systems within the personality. Which list below best describes those archetypes (in order)? I chose ...
*June 29, 2013 by Diane*

**chemistry**

how do i plot the gibbs isotherm equation in excel given concentration and surface tension? I'm looking for surface excess which is the slope on the graph, the equation is r=1/RT(dST/dln(c)), ST is the surface tension. Do I plot the ln of the concentration versus the surface ...
*February 27, 2015 by marnie*

**LINEAR EQUATIONS **

Kathleen is ordering wraps from a local sandwich shop. The total charge includes a set delivery fee plus the price per wrap. Each wrap is the same price. Kathleen asks about specific orders and is given the following info: If she orders 20 wraps, the total cost will be $100 If...
*April 12, 2015 by Kimbo*

**Linear Algebra**

Let u and v be vectors in R^n, and let T be a linear operator on R^n. Prove that T(u) dot T(v) = u dot v IFF A^T = A^-1 where A is the standard matrix for T.
*March 7, 2007 by romulo*

**extreme math help please**

The data in the table illustrate a linear function. What is the slope of the linear function. x |0|2|4|6| y|-5|-2|1|4| Thank you
*May 9, 2015 by Anono*

**linear algebra**

Let L: R2 R2 be a linear transformation for which we know that L(1 1)= [-2 1] L(-1 1)=[3 2] a)what is L(-1 5) b)what is L(u v)?
*April 15, 2015 by hannah*

**organic chemistry**

Something that isn't consumed by the reaction (so say A) is dissolved at the same time as something that is consumed by the reaction (B) in a solvent, so that they are in the same phase...what is this reaction an example of? What is the most pervasive particle that is involved...
*November 18, 2010 by ????*

**Human Growth**

According to Erik Eriksons psychosocial theory, there are eight developmental stages, each with its own crises to be resolved. Successful resolution of each of the eight crises: A. requires that the negative trait be eliminated altogether, and the positive trait prevail B is ...
*October 22, 2015 by Tonya*

**business**

If Jaguar decides it will only have dealerships in cities with at least 150,000 people, it is using a ______ variable to segment its market. A) behavioristic B) demographic C) psychographic D) environmental E) geographic Which of the following is true with respect to ...
*September 29, 2014 by business*

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

Please check these out for me, if I am correct: Match the following statements with SN1 or SN2 reactions: 1) The order of reactivity in alkyl halides is methyl>primary>secondary>tertiary 2) There is an intermediate carbocation 3) The rate-limiting step involves the ...
*March 12, 2008 by K*

**Geometry**

A shopping center plot of land is in the shape of a parallelogram. Give two other facts about the plot or roads through it. I do not understand can you please explain? I know that A quadrilateral is a parallelogram if and only if it has two pairs of parallel sides. A ...
*April 9, 2010 by purple*

**Math**

Choose any number for p. Determine whether the following equation is true. (2p-3)(p+4)=2p^2-5p-12 I don't think this is true. Am I correct?
*November 18, 2014 by Cherie*

**9th grade**

A biologist gives a new kind of food to a group of dogs and compares the weight gain of these dogs over time to a group of similar dogs that did not recieve the new food. Identify the experimental variables and dependent variables
*September 7, 2008 by Kristine*

**Social Studies**

You are an investor in the Virginia Company. In order to make a profit, you must encourage people to leave England and move to Jamestown. Create an advertisement describing two advantages of living in Virginia. Include the advantages in a catchy phrase and colorful picture.
*September 14, 2011 by Lisa*

**Algebra**

Explain how you can determine from the graph of a system of two linear equation in two variables whether is an inconsistent system of equation. 2. When you solve a system of equation by the substitution method how do you determine whether the system of equation is inconsistent?
*October 14, 2015 by Angelina*

**Chemistry**

I am stuck on b)... Reacting 1 L of H2(g) with 1 L C2H2(g) (both at STP) results in the formation of 1 L of C2H4(g) if the reaction is maintained at the same conditions (STP) and goes to completion. If this reaction produced 6.3 kJ of heat (absorbed by the surroundings), ...
*January 25, 2016 by Sanaya*

**chemistry**

I want to know if someone could let me know if I have written my balanced equations correct for the following questions. Write a balanced equation for the reaction of zinc with sulfuric acid. Zn + H2SO4 >>> Zn(S04) +H2 Write a balanced equation for the reaction of ...
*April 21, 2014 by jazz*

**math**

can someone please help me fast before midnight. a)I need the correlation between x and y b)slope of linear regression c)y intercept of linear regression for the points (1,8)(2,6)(3,4)(4,2)(5,5)
*May 5, 2008 by john*

**STATS**

X 3, 5, 6, 8, 9, 10, 12, 14, 15 Y 30,33,34,36,37,40, 50, 60, 70 Calculate Linear Correlation Coefficient r Use significance level 0.05 and Appendix Table A-6 to make decision about linear correlation between x and y.
*March 30, 2010 by Mary*

**Math (linear approximation)**

Find a linear approximation of the function f(x)=(1+x)^(1/4) at a=1, and use it to approximate the numbers (.95)^(1/4) and (1.1)^(1/4). Round your answers to the nearest thousandth Cheers in advance!
*November 29, 2011 by Alison*

**Math: Linear Equation **

I have not learned this yet in class and I am stuck on this homework problem. Graph the linear equation by using a table of solutions. 3x-4y=12
*May 20, 2014 by Ashley *

**linear algebra**

If possible, solve the following linear systems by Cramer's rule. 2x1 + 4x2 + 6x3 = 14 x1 + 2x3 = 0 2x1 + 3x2 − x3 = 30
*February 9, 2015 by hannah*

**Math **

The graph of a linear relation goes through the point (6, 4) and is parallel to the line y = 5x + 10. Write the equation of the linear relation in slope- intercept form.
*July 15, 2015 by Kelly Brians*

**Chemistry**

Factors affecting reaction rate. Use collision theory to explain. Factor: nature of the reactant Affect on rate: more or less reactive based on its chemical identity. reactivity: aq>g>l>s Explanation: For the other factors, we had to explain it based on whether the ...
*March 3, 2013 by a Canadian*

**chemistry**

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i think it's C2H6OH...
*October 25, 2015 by Mark*

**chemistry help!!!**

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i think it's C2H6OH...
*October 25, 2015 by Mark*

**chemistry help!!!**

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i think it's C2H6OH...
*October 25, 2015 by Mark*

**Chemistry**

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i think it's C2H6OH...
*October 26, 2015 by Mark*

**CHEMISTRY!!!!**

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i think it's C2H6OH...
*October 26, 2015 by Mark*

**chemistry help!**

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i think it's C2H6OH...
*October 26, 2015 by mark*

**CHEMISTRY!!!!**

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i think it's C2H6OH...
*October 26, 2015 by Mark*

**Chemistry**

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i think it's C2H6OH...
*October 26, 2015 by Mark*

**chemistry**

H2C=CH2(g) + H2(g) C2H6(g) Adding a small amount of platinum powder greatly increases the rate of the reaction above. How might the platinum be affecting the rate of the reaction? (Select all that apply.) 1) It increases the concentration of the reactants. 2) It increases the ...
*November 18, 2010 by nick*

**programming**

Create the logic for a program that prompts a user for three numbers and stores them in an array. Pass the array to a method that reverses the order of the numbers. Display the reversed numbers in the main program.
*March 28, 2013 by stephanie*

**Chemistry **

Consider the following reaction at constant P. Use the information here to determine the value of ΔSsurr at 398 K. Predict whether or not this reaction will be spontaneous at this temperature. 4 NH3(g) + 3 O2(g) → 2 N2(g) + 6 H2O(g); ΔH = -1267 kJ A)ΔSsurr...
*May 5, 2014 by Jeff*

**Math/Calculus**

Solve the differential equation y'=3t^2+4. Solve the initial value problem y(0)=3. Separation of variables! My work: dy/dt= 3t^2+4 dy= 3t^2+4 dt Then you integrate both sides. ∫ dy= ∫ 3t^2+4dt Question: is there a 1 in dy? ( ∫ 1dy)? If so: y+C1=t^3+4t+C2 y=t^...
*April 2, 2015 by Sarah*

**math (statistics)**

There are 15 qualified applicants for 5 trainee positions in a fast-food program. How many groups of trainees can be selected? I have a feeling that the answer is 75 but I'm not too sure. Any help is appreciated. Thank you! The first trainee can be any one of 15 people, the ...
*April 9, 2007 by vivian*

**Calculus - Second Order Differential Equations**

Solve the boundary-value problem. y''+5y'-6y=0, y(0)=0, y(2)=1 r^2+5r-6=0, r1=1, r2=-6 y=c1*e^x + c2*e^-6x y(x)=c1*e^x+c2*e^-6x y'(x)=c1*e^x-6*c2*e^-6x y(0)=c1+c2=0, c1=-c2 y(2)=c1*e^2+c2*e^(-12)=1 -c2*e^2-6c2*e^(-12)=1 -c2(e^2-6*e^-12)=1 c2=-1/(e^2-6e^-12) c1=1/(e^2-6e^-12) y...
*July 9, 2007 by COFFEE*

**Chemistry**

A zero-order reaction has a constant rate of 3.2010^−4 M/s. If after 35.0 seconds the concentration has dropped to 9.0010^2M , what was the initial concentration?
*April 30, 2010 by D.Walker*

**English**

choose the correct answer "(who-whom)am I speaking to?" "This is (me - she - her,"said the girl when the speaker asked to speak to Joyce. (whoever - whomever) ate my icercream will regret it.
*March 27, 2008 by Julz*

**English**

Choose the correct sentence. A. Whom do you think you are? B. Give the ledger to Mr. Bon or me. C. Either me or you should win first place. D. The secret is between Joe and I. B
*April 14, 2014 by Angela*

**Algebra**

Now this next question I unfortunately don't get at all: ~Chow Li is planting a border of 48 seedlings that will completely surround a rectangular garden plot. He wants to plant the seedlings 2 feet apart. If the garden plot is to be 30 feet long, how wide should it be?~ Can ...
*September 15, 2007 by Jamie*

**Chemistry**

Recognize each of the following reactions as synthesis, decomposition, single replacement, double replacement, neutralization, or combustion. A)H3PO4 + 3NaOH -> Na3PO4 + 3H20 This reaction is known as Neutralization. B)P4 + 5O2 -> P4O10 This reaction is known as ...
*July 13, 2010 by Derrick*

**physics 11**

for a project we're required to create a thermose from household products. What ideas can we use to create an insulator. Any other ideas to keep the heat inside the thermos. Thank-you
*November 30, 2009 by need help*

**systems word problems**

the sum of two numbers is 11. their product is 30. find the numbers. answer 5,6 represent the unknown by variables using let statements, translate into equationsusing variables. combine hem using substitution or elimination. answer the question by solvingand substituting state...
*March 1, 2010 by ed*

**create resume**

create a resume for online distribution for an Internship, I have never done this before.
*May 17, 2008 by lisa*

**CHemistry**

Arrange the following compounds in order of decreasing ease of elution from a column of silica gel: a) 2-octanol; b) 1,3-dichlorobenzene; c) tert-butylcyclohexane; d) benzoic acid I was wondering if this was the correct order of it: Tert-butylcyclohexane > 1,3-...
*May 2, 2010 by Johnny*

**English**

I must improve the organization of these four sentences of a paragraph in the most effective way. Is my answer correct? Sentences: 1. The reader has probably figured out that the boy named Walter was Walter Elias Disney. 2. During his lifetime Disney and his staff created 18 ...
*January 24, 2013 by M*

**calculus**

Please help me solve. I think increase = concave up and decrease = concave down? On the graph y = x^5-15x^3+10 for x what intervals is the function increasing, decreasing, concave up and concave down. Plot the critical points, plot and label the inflection points. Solve for ...
*July 21, 2012 by andy*

**physics**

choose the correct answer and why? a car starts from rest and reaches speed of 80 km/h in 16 s the average acceleration of the car is: a\ 0.7 m/s*2 b\1.4 m/s*2 c\5 m/s*2
*February 20, 2014 by Reem*

**english **

Choose the correct sentence pattern for the sentence below. I hereby declare Tuesday Shakespeare Day.
*April 19, 2015 by charles*

**literacy**

Please someone can tell me if my answer is correct. Does the U.S. Senate choose the Supreme Court justices? yes or no. My answer is (no).
*July 15, 2015 by ezekiel*

**Math**

are these in correct order from least to greatest 100feet, 10,000inches, 1km, 1 mile
*January 21, 2009 by Tyler*

**4th grade**

what are the bodies of water (canada) please list them in the correct order.
*October 11, 2009 by samatha*

**grammar**

in order to write sentences that are correct in srtucture is this a fragment run-on sentence
*December 9, 2009 by silvia*

**space science**

In size, from largest to smallest, the correct order for the Galilean moons is:
*October 10, 2010 by Marcie*

**Math**

Which choice gives the correct order of operations needed to find the value of 4(6+3)-24 A.+,x,- B.x,+,- C.-,x,+ D.+,-,x A?
*September 12, 2012 by Derrick*

**pre algebra HELP**

Can someone help me with this? I have to use order of operation with it to -12/3x(-8+(-4^2) -6)+2 My answer: -6 Is this correct???
*September 25, 2015 by Crystal X-luel*

**math,correction,plz**

Evaluate (15-5)/[((12)/(2*2))-2] my answer that i keep getting is 1 am i even correct or completely wrong The ans is 10 see i had that for the answer but when i revised the rule for order of operations. it says to divide first then multiply left to right and thats whats making...
*February 13, 2007 by jasmine20*

**phys**

There are many social and cultural contexts you interact with that strongly influence development. These contexts include people you interact with daily, neighborhood factors, and larger scale social and cultural variables. In order to fully understand how the environment ...
*September 7, 2010 by Joseph*

**Science**

I have 8 questions and 1 question in the end that I don't need help with. Identify possible variables in the following situations. What variables can affect the sprouting of a bean seed? I think (I didn't answer yet so I'll just go with what I think oh and these aren't multi ...
*August 20, 2015 by anon*

**organic chemistry**

What is the complete reaction mechanism for the reaction between butanone and methylamine (CH3NH2) with the reaction buffered at a pH of 3.5 and heated.
*July 28, 2014 by Jenn*

**micosoft 2013**

20. Which of the following processes should Angel use to merge cells A1:D4 to create a title? A. Highlight cells A1:D4, click on the Home tab, and click on the Wrap text icon in the Alignment group. B. Highlight cells A1:D4, right-click and select Format Cells, click Alignment...
*September 6, 2015 by Lisa*

**chemistry**

VSEPR theory predicts that the geometry of AsH3 molecule is which of the following. linear trigonal planar trigonal pyramidal tetrahedral please explain the correct answer
*February 23, 2014 by Lisa*

**Math**

What is the linear approximation of the square root of 8.9? Must be accurate to the fifth decimal place. I have tried entering 2.98328 and 2.98328 but that does not appear to be correct. Please help!!
*October 5, 2014 by Amanda*

**Chemistry**

The rate constant for this first order reaction is 0.440s-1at 400 C. A to products How long(in seconds) would it take for the concentration of A to decrease from 0.740 M to 0.290 M?
*July 19, 2011 by Josh *

**Chem 132**

The rate constant for this first-order reaction is 0.650 s1 at 400 C. A------> Products How long (in seconds) would it take for the concentration of A to decrease from 0.660 M to 0.350 M?
*March 21, 2013 by Unknown*

**Chemistry**

Consider the reaction HCHO(g) *) H2(g) + CO(g). 1.0 mol of HCHO, 1.0 mol of H2 and 1.0 mol of CO exist in equilibrium in a 2.0 L reaction vessel at 600C. a) Determine the value of the equilibrium constant Kc for this system. 2.0 moles of HCHO and 1.0 mol of CO are then added ...
*June 3, 2014 by Susan*

**Linear combinations**

Solving linear combinations Do you have a particular example of a problem you need help with?
*March 13, 2007 by Paris*

**Math**

Is this a quadratic or linear function? Identify the quadratic,linear, and constant terms 3(x-2)^2+12x
*November 3, 2009 by tyler*

**Math**

For which values is the relationship linear? Tell how you decided. Write the equation for each linear relationship x 5 10 15 20 25 30 y 20 30 40 50 50 50
*December 12, 2009 by lyndse*

**math - plz help!!**

How to write three linear system that are equivalent to the linear system shown? 5x-4y= -3 2x + 7y= 5
*April 10, 2015 by lyn*

**math**

Suppose f(x)=ln x. (a) Find the linear approximation of f at a=1. L(x)= (b) Use the linear approximation to estimate ln 1.27. ln1.27=
*October 24, 2015 by John*

**math**

An auto manufacturer sends cars from two plants, I and II, to dealerships A and B located in a Midwestern city. Plant I has a total of 28 cars to send, and plant II has 8. Dealer A needs 20 cars, and dealer B needs 16. Transportation costs per car, based on the distance of ...
*August 21, 2012 by NotGonnaSay*