Wednesday

April 23, 2014

April 23, 2014

Number of results: 221,980

**geometry**

Use the following statements to answer questions 2 and 3. I. If it is warm out and does not rain, then i will go to the beach. II. If i order strawberry or cookies and craam ice cream then i will be happy. III. If i go to the party, then i will see Fred. 2. Which of the above ...
*Friday, October 26, 2007 at 2:32pm by Haiden*

**Someone said its English... but its geometry**

Use the following statements to answer questions 2 and 3. I. If it is warm out and does not rain, then i will go to the beach. II. If i order strawberry or cookies and craam ice cream then i will be happy. III. If i go to the party, then i will see Fred. 2. Which of the above ...
*Friday, October 26, 2007 at 3:15pm by Haiden*

**help me its urgent**

Consider the following student errors. After each error, state: i) What the mistake is. ii) Why you think it has been made. iii) How you would explain and correct the mistake with a student. a) I am a secretary for five years. i) ii) iii) b) I have eat breakfast. i) ii) iii) c...
*Thursday, December 2, 2010 at 4:18am by rahila*

**science**

Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides A) I only B) II only C) Both I and II D) neither I nor II I think it's A - is that right?
*Saturday, January 1, 2011 at 6:07pm by i love chem*

**Discrete Math**

There are 150 students taking Discrete Mathematics II, Calculus II, and Physics I courses. Of these 51 are taking Discrete Mathematics II, 111 are taking Calculus II, and 63 are taking Physics I. There are 41 taking Discrete Mathematics II and Calculus II, 32 students taking ...
*Sunday, April 6, 2014 at 11:29pm by Anonymous*

**chemistry**

For the following: i) H3PO4 > H3AsO4 > H3SbO4 ii) H2Te > H2Se > H2S > H2O iii) HCl > HBr > HI iv) SbH3 > AsH3 > PH3 > NH3 The order of acidity is correct for which series? 1. ) all are correct 2. ) i and ii 3. )i, ii and iv 4. ) ii, iii 5. ii, iv...
*Tuesday, November 24, 2009 at 2:32pm by bob*

**Calculus**

Let f be defined as follows, where a does not = 0, f(x) = {(x^2 - 2a + a^2) / (x-a), if x does not = a 5, if x = a Which of the following are true about f? I. lim f(x) exists as x approaches a II. f(a) exists III. f(x) is continuous at x = a. A. None B. I, II, and III C. I ...
*Saturday, October 22, 2011 at 6:34pm by Mishaka*

**Math**

if x and y are two different integers in S, which of the following must be the square of an integer I. (x-1)(y-1) II. 4(x-1) III. x^2+y^2 a. none b. I only c. II only d. III only e. I and II
*Thursday, July 25, 2013 at 4:39pm by Anon*

**Chemistry**

Which of the following is/are present in a reagent bottle labeled 1.0 M H2SO4? I. H2SO4 II. HSO4- III. SO4-2 A. I only B. I and II C. II and III D. I, II, and III
*Saturday, April 13, 2013 at 2:35pm by Anna*

**Calculus (Limits)**

Let f be defined as follows, where a does not = 0, f(x) = {(x^2 - 2a + a^2) / (x-a), if x does not = a 5, if x = a Which of the following are true about f? I. lim f(x) exists as x approaches a II. f(a) exists III. f(x) is continuous at x = a. A. None B. I, II, and III C. I ...
*Saturday, October 22, 2011 at 7:30pm by Mishaka*

**chemistry**

A student determines the cobalt(II) content of a solution by first precipitating it as cobalt(II) hydroxide, and then decomposing the hydroxide to cobalt(II) oxide by heating. How many grams of cobalt(II) oxide should the student obtain if her solution contains 46.0 mL of 0....
*Monday, March 3, 2014 at 4:30pm by jen*

**Business law**

Which of the following statements are true? I. Federal law does not provide any right of workers to bargain collectively. II. It is not an unfair labor practice for an employer to refuse to bargain with a duly elected employee union. a. I only b. II only c. Both I and II d. ...
*Tuesday, June 30, 2009 at 2:28pm by Anonymous*

**statistic**

which is true about the response variable? i this used to be called the dependent variable. ii when graphing the data, the response variable is plotted along the x-axis only I only ii both I and ii neither I or ii
*Tuesday, January 14, 2014 at 2:14pm by helen*

**Chemistry**

Which of the following does form a Group II cation? lead iron cobalt nickel How do you figure this one out? You must know what is in group II. Fe, Co, and Ni are in group III. Pb is in both group I and group II. Pb ppts as the chloride in group I and as the sulfide in group II.
*Tuesday, February 20, 2007 at 11:47am by Chemistry*

**Calculus, check my answers, please? :)**

Okay, so I think these are right, but I would appreciate if someone could check them and tell me if something is wrong and what the right answer is. I'd also appreciate an explanation if possible. :)Thank you! 7. Given that f(x)={x^3 if x ≥ 0 {x if x < 0 which of the ...
*Wednesday, October 2, 2013 at 11:15pm by Samantha*

**chemistry**

Which of the following would lower the vapor pressure of a sample of butanol in a closed container? I) decreasing the temperature of the sample II) decreasing the size of the container III) draining off some of the liquid a. I, II and III b. I and II c. II and III d. I and III...
*Friday, January 28, 2011 at 7:31pm by john*

**Help please math**

I show you one of them and the other one is your work ;) .. (i) 7x + 2y = - 8 (ii) 8y = 4x ______________ i take equation (ii) and solve it for x: 8y=4x (divide by 4) 2y=x or x=2y (iii) ____________ now i take (i) and substitute (iii): 7(2y)+2y=-8 14y+2y=-8 16y=-8 (divide by ...
*Friday, January 10, 2014 at 3:14pm by Anonymous*

**chemistry**

the Ka for acetic acid, HC2H3O2, is 1.8x10-5 at 25 deg. Celsius. In a .10 M solution of potassium acetate, which of the following are true? I. [HC2H3O2] = [OH-] II. [H+] = [OH-] III. [C2H3O2-] < .10 M a. I only b. II only c. III only d. I and II e. I, II and III What is ...
*Sunday, April 22, 2007 at 8:05am by Anonymous*

**Math**

Which of the following represents a permutation? (Pick from multiple choice answer listed below) I. The top 4 finishers in a car race II. Choosing 4 apples from a bag with 10 apples III. A committee of 6 representatives from a class A. I. only B. II. only C. III. only D. II. ...
*Thursday, June 4, 2009 at 9:19pm by Happy Face*

**Chemistry**

Which of the following represents a pair of isotopes? Atomic Number Mass Number a. I 7 16 II 8 16 b. I 17 34 II 18 36 c. I 17 35 II 17 37 d. I 7 14 II 8 16 e. I 17 37 II 18 37
*Tuesday, March 23, 2010 at 5:47am by Husy*

**math**

If the function is defined by (x) = (x - a)(x - b) over (x - c), where 0 < a < b < c, for which of the following values of x is undefined? I. a II. b III. c These are the answer choices: 1. None 2. I only 3. III only 4. I and II only 5. I, II, and III
*Thursday, April 24, 2008 at 8:47pm by Anonymous*

**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, etc. ...
*Saturday, July 17, 2010 at 11:09pm by june*

**Statistics**

Sorry to ask another question but I keep struggling with this class. If all else remains the same, which of these will make a confidence interval for a proportion narrower? I. Increase the confidence level. II. Increase the sample size. III. Increase the margin of error. A. I ...
*Saturday, March 29, 2014 at 12:59pm by John*

**math**

The fraction 5Y3X/2Y8, in which X and Y stand for unknown digits, represents a division which results in a quotient that is whole number. Which of the following is (are) true? not just and answer please I. X may equal 2. II. X may equal 6 or 0. III. X may equal 4. A.I only B....
*Sunday, August 4, 2013 at 6:07pm by vincent*

**Math - Advanced Algebra**

if -1 < u < 0 < v < 1, which of the following in qualities could be true? I. u/v < -1 II. -1 < u/v < 0 III. u/v > 0 A) I only B) II only C) I and II only D) I and III only E) I, II and III
*Saturday, September 7, 2013 at 7:45pm by Venus*

**Algebra**

elimination method means to eliminate one of the variables.let us eliminate s. 3r - 5s = 6 ---I 5r + 3s = 44 --II as a thumb rule multily eq I by 3 (coef. of s in eq II) and multiply eq II by 5 (coef. of s in eq II) 9r - 15s = 18 ---I 25r +15s = 220 --II By vertical addition ...
*Monday, November 23, 2009 at 9:28pm by Anonymous*

**chemistry**

You couldn't find them, probably because there is no reason to get confused with the answers, at least for some of them. I would name them sodium(I) chloride **see note potassium(I) fluoride ** see note calcium(II) sulfide **see note cobalt(II) nitrate (could confuse) iron(III...
*Sunday, March 2, 2008 at 9:59pm by DrBob222*

**Chemistry**

iron(III) sulfide = iron(III) + S(II) so formula is, and you are correct, Fe2S3. If iron is II and S is II, it should be obvious that FeS is iron(II) sulfide.
*Wednesday, October 3, 2007 at 5:41pm by DrBob222*

**Chemistry**

To neutralize a solution of NaOH and use the least volume of acid, you should select I. 1.0M HCl II. 1.0 M HC(2)H(3)O(2) III. 1.0 M H(2)SO(4) (A) I only (B) II only (C) III only (D) I and II use equal and lesser volumes. (E) I, II, and III use the same volumes of acids
*Tuesday, April 29, 2008 at 11:33am by Dom*

**chemistry**

there are 2 reactants copper(II) oxide and hydrochloric acid the products are copper(II)chloride and water. what change will you observe in the copper(II)oxide? was there a change in solubility? where is the copper(II)chloride? how can you tell
*Monday, October 10, 2011 at 5:00pm by dianne*

**Calculus (Limits)**

If g(x) is continuous for all real numbers and g(3) = -1, g(4) = 2, which of the following are necessarily true? I. g(x) = 1 at least once II. lim g(x) = g(3.5) as x aproaches 3.5. III. lim g(x) as x approaches 3 from the left = lim g(x) as x approaches from the right A. I ...
*Saturday, October 22, 2011 at 7:29pm by Mishaka*

**Calculus**

If g(x) is continuous for all real numbers and g(3) = -1, g(4) = 2, which of the following are necessarily true? I. g(x) = 1 at least once II. lim g(x) = g(3.5) as x aproaches 3.5. III. lim g(x) as x approaches 3 from the left = lim g(x) as x approaches from the right A. I ...
*Saturday, October 22, 2011 at 6:40pm by Mishaka*

**trig**

sin positive, quad I and II Tan negative, Quad II, IV Quad II
*Tuesday, June 11, 2013 at 7:59pm by bobpursley*

**Genetics**

Given below is a pedigree in which the inheritance of an autosomal dominant disease gene is being followed. Linked to the disease gene (3 cM = 3% recombination away) is a RFLP marker with 2 alleles (5 kb and 3 kb). Given the DNA marker compositions for children II.2 and II.3 (...
*Monday, October 10, 2011 at 6:39pm by Karan*

**CHEM_**

if 16.5 of iron (II) sulfide contain 6.02 x 10^23 formula units, how many formula units of iron (II) sulfide are in 1.00 mL of iron (II) sulfide? The density of iron (II) sulfide is 4.84 g/cm^3
*Monday, March 22, 2010 at 12:21am by Sienna*

**Statistics**

Which of the following statements about the correlation coefficient r are true? I. It is not affected by changes in the measurement units of the variables. II. It is not affected by which variable is called x and which is called y. III. It is not affected by extreme values. I ...
*Monday, November 12, 2012 at 9:26am by John*

**Chemistry**

Lead can be extracted from lead(II) sulfide, PbS, in two stages. Stage 1: Lead(II) sulfide is heated in air. It reacts with oxygen to produce lead(II) oxide and sulfur dioxide. Stage 2: The Lead(II) oxide is then heated in a blast furnace with coke. (a) Write a chemical ...
*Monday, April 22, 2013 at 2:37pm by Qindan*

**History**

Oops, I guess coying and pasting doesn't work here. Here are the rest: 5. Henry II 6. Richard the lionheart 7. John 8. Henry III 9. Edward I Longshanks 10. Edward II 11. Edward III 12. Henry VII 13. Henry VIII 14. Edward VI 15. Mary I 16. Elizabeth I 17. James I 18. Charles I ...
*Saturday, May 17, 2008 at 10:13pm by Nathalie*

**calculus**

3. A deposit of ___(i)___is made into an account paying an interest rate of 5% compounded annually. How many annual payments of ___(iii)___can be made from this account? a) (i)$100,000 (ii)$10,000 b) (i)$200,000 (ii)$20,000 c) (i) 10x (ii) x d) (i) 10x (ii) x at r% compounded ...
*Wednesday, June 1, 2011 at 4:05am by erica*

**math**

Make a sketch of your triangle in quadrant II to see that x = -3, r = 4 and from Pythagoras that y = √7 in II so sin = √7/4 sin 2 = 2sincos = 2((√7/4)(-3/4) = -3√7/8
*Friday, April 18, 2014 at 10:15am by Reiny*

**Physics**

conservation of momentum Ii*wi=If*wf=wf(Ii+1/2 massand*.40^2) you are given Ii, wi, masssand. Solve for wf
*Tuesday, November 1, 2011 at 7:22pm by bobpursley*

**math**

let the no. be x and y... x - y = 7.........i 1/3 x- 1/4 y =7..........ii eq ii x 12 4x - 3y = 84.....iii subtracting i and iii y=40 substituting in any eq x=51
*Monday, October 1, 2012 at 10:22am by Anonymous*

**Chemistry**

For the following: i) HClO4 > HBrO4 > HIO4 ii) NH3 > PH3 > AsH3 > SbH3 iii) HOClO3 > HOClO2 > HOClO > HOCl iv) HBr>HCl>HF The order of acidity is correct for which series? 1. ) all are correct 2. ) ii and iii 3. ) ii and iv 4. ) ii 5. ) i, iii, iv
*Sunday, November 22, 2009 at 5:35pm by Apple*

**PHysics**

A dragster maintains a speedometer reading of 100 km/h and passes through a curve with a constant radius. Consider the following forces: I) air drag pushing back on the car; II) gravity pulling down on the car; III) the ground pushing up on the car; IV) friction pushing the ...
*Thursday, April 28, 2011 at 1:24am by Leslie*

**science**

(Points: 10) For the following: i) HClO4 > HBrO4 > HIO4 ii) NH3 > PH3 > AsH3 > SbH3 iii) HOClO3 > HOClO2 > HOClO > HOCl iv) HBr>HCl>HF The order of acidity is correct for which series? 1. ) all are correct 2. ) ii and iii 3. ) ii and iv 4. ) ii 5...
*Saturday, November 21, 2009 at 11:14pm by victor*

**science**

(Points: 10) For the following: i) HClO4 > HBrO4 > HIO4 ii) NH3 > PH3 > AsH3 > SbH3 iii) HOClO3 > HOClO2 > HOClO > HOCl iv) HBr>HCl>HF The order of acidity is correct for which series? 1. ) all are correct 2. ) ii and iii 3. ) ii and iv 4. ) ii 5...
*Sunday, November 22, 2009 at 12:24am by victor*

**CHemiStry!**

Select all ionic compounds in which the number of anions present is two. carbon dioxide X manganese(II) hydroxide mercury(II) carbonate X mercury(II) phosphate ammonia sulfur dioxide Hello, I know manganese(II) hydroxide mercury(II) phosphate both have two anions, however I am...
*Friday, May 7, 2010 at 8:50pm by ChEm*

**Chemistry**

Which of the following substances exist(s) as a resonance hybrid? CO2 (g) SO3 (g) HCO2- (aq) A. I only B. II only C. III only D. I and II only E. II and III only Ans w/i 12 hrs please!!
*Thursday, August 11, 2011 at 9:34am by Neha*

**college finite math**

A product may be made using Machine I or Machine II. The manufacturer estimates that the monthly fixed costs of using Machine I are $17,000, whereas the monthly fixed costs of using Machine II are $14,000. The variable costs of manufacturing 1 unit of the product using Machine...
*Sunday, January 19, 2014 at 7:36pm by Dee*

**economics**

Suppose that in this city, the price of a spaghetti dinner changes from $10 to $15. Which of the following statements correctly describes what happens in the calculator? I. There is a reduction in the number of dinners that people buy. II. There is a reduction in demand. III...
*Monday, October 10, 2011 at 2:47am by mikku*

**statistic**

27. which is true about the response variable? i. this used to be called the independent variable. ii. when graphing the data, the response variable is plotted along the y-axis only i only ii both i and ii neither
*Tuesday, January 14, 2014 at 2:19pm by helen*

**human resource**

I am writing a paper on this subject and I need help can someone please help . Introduction Performance Management Process II. Purpose of Employee Performance Appraisals a. Evaluating employees skill levels b. Feedback Opportunities i. Employee performance ii. Company ...
*Wednesday, December 3, 2008 at 7:43pm by sandra*

**chemistry**

moles Cr2O7^-2 = M x L = ?? Using the coefficients in the balanced equation, convert moles Cr2O7^-2 to moles Fe(II). Then M Fe(II) = moles Fe(II)/L Fe(II)
*Thursday, March 3, 2011 at 4:47pm by DrBob222*

**PHYSICS**

You are driving a car down a straight road at a constant 48 miles per hour. Consider the following forces: I) air drag pushing back on the car; II) gravity pulling down on the car; III) the ground pushing up on the car; IV) friction pushing the wheels (and the car) forward; ...
*Thursday, April 28, 2011 at 1:40am by Diana*

**college chem**

two reactants are copper(II)chloride and water what change would you observe in the copper(II)oxide. was there a change in solubility? where is the copper(II) chloride? how can you tell
*Sunday, October 9, 2011 at 12:21pm by dianne*

**Capacitors**

(a) i)0 ii)0 iii)Q(t) = 3 * Q_0 and E = Q(t)/(A * epsilon_0) ....where A = pi*a^2 (b) i)0 ii)don't know iii)0 (c) i)don't know ii)0 iii)0 (d) i)don't know (e) i)don't know
*Friday, May 24, 2013 at 5:35am by Rahul*

**calculus**

I have a couple of questions that I'm not sure how to do! 1) Given f(x) = (x^2 - 2x + 1) for x does not equal 1 and (k) for x = 1 Determine the value of k for which f is continuous for all real x. a) 0 b) 1 c)2 d)3 e)none of the above i think the anser is a but i'm really not ...
*Thursday, September 24, 2009 at 10:32pm by allison*

**chemistry/HELP PLLEASE**

can someone please help me balance this equation?: potassium permanganate reacts with iron(II)sulfate and sulfuric acid to produce iron(II)sulfate and manganese(II)sulfate and potassium sulfate and water
*Friday, February 18, 2011 at 9:24am by joy*

**Gen Chem II**

Thanks for the information Dr. Bob. Would you be able to work it out so that I can actually see the steps with the numbers and follow from there. The question was on Vitamin K from Sunday at 2:44pm which you answered at 3:45pm. Thanks again. I am looking to get a tutor since I...
*Monday, February 11, 2013 at 5:28pm by Nefret*

**math**

(a)find antiderivatives for the following functions : (i) e^5x sinh3x + 4x+6/x^2+3x+5 . (ii)root3x(x^2-2/x+1). (b)Evaluate the following integrals over the given intervals: (i)4/2x-1 - 3/x+4 over [1,3] (ii)cosh 3x-sinh4x over [0, ln2] (c)A particle is moving from rest with an...
*Tuesday, May 8, 2012 at 5:52pm by weloo_volley*

**chemistry**

can someone please help me balance this equation?: potassium permanganate reacts with iron(II)sulfate and sulfuric acid to produce iron(II)sulfate and manganese(II)sulfate and potassium sulfate and water
*Friday, February 18, 2011 at 2:07am by joy*

**physics(URGENT)**

if you solve II for cos(th) you get v from I, then you get the angle from II but what is wron with N(30)=mgcos(th)?
*Friday, November 1, 2013 at 3:56pm by Anonymous*

**math**

heeeeelp meeeee ... (a)find antiderivatives for the following functions : (i) e^5x sinh3x + 4x+6/x^2+3x+5 . (ii) 3x(x^2-2/x+1). (b)Evaluate the following integrals over the given intervals: (i)4/2x-1 - 3/x+4 over [1,3] (ii)cosh 3x-sinh4x over [0, ln2] (c)A particle is moving...
*Wednesday, April 25, 2012 at 12:16am by weloo_volley*

**math**

weloo (a)find antiderivatives for the following functions : (i) e^5x sinh3x + 4x+6/x^2+3x+5 . (ii)root3x(x^2-2/x+1). (b)Evaluate the following integrals over the given intervals: (i)4/2x-1 - 3/x+4 over [1,3] (ii)cosh 3x-sinh4x over [0, ln2] (c)A particle is moving from rest ...
*Monday, May 14, 2012 at 4:41am by weloo*

**chem!**

A 2.80 mol/L solution of iron (II) dichromate is combined with 5.00L of a 2.25 mol/L acidic solution of tin (II) bromide. Calculate the volume of iron (II) dichromate required. FeCr2O7 + SnBr2 --> SnCr2O7 + FeBr2 Is this the right formula? or no?
*Wednesday, May 16, 2007 at 5:34pm by Mistra*

**UCI Chemistry Webworks**

using the table II a) i, iv b) ii, iii c) viii d) vi
*Saturday, May 7, 2011 at 9:31pm by uci student*

**Quotes**

Thanks Ms.sue But now i just need to awnser ii) and ii) and thanks for the feedback i used it.
*Monday, October 3, 2011 at 8:25pm by help*

**Energy Transfer in Natural Systems**

A = III B = II C = II D = I
*Friday, December 3, 2010 at 10:04pm by Sydney*

**UCI Webworks**

Answer the follow using the Energy Profile plot. More than one answer is possible for some questions. What chemical species are present... A. at the longest constraint distance? (Use i, ii, iv, etc. for your answer) B. at the highest energy? (Use i, ii, iv, etc. for your ...
*Monday, July 19, 2010 at 6:30pm by Screwed*

**UCI Webworks**

Answer the follow using the Energy Profile plot. More than one answer is possible for some questions. What chemical species are present... A. at the longest constraint distance? (Use i, ii, iv, etc. for your answer) B. at the highest energy? (Use i, ii, iv, etc. for your ...
*Monday, July 19, 2010 at 7:20pm by Screwed*

**statistics**

I'll give you some background on Type I and Type II errors and let you take it from there. Type I errors result when you reject the null and it's true. Type II errors result when you accept the null and it's false. You can reduce Type I errors by setting the alpha at a lower ...
*Monday, September 13, 2010 at 1:16pm by MathGuru*

**math **

If planet I is 31.8 million miles from the sun than planet II, then planet III is 25.6 million miles father from the sun than planet I. When the total of the distances for these three planets from the sun is 200.2 million miles, how far away from the sun is planet II? Planet ...
*Friday, September 7, 2012 at 4:12pm by Kelly*

**trig**

If sec < 0 then cos<o and the cosine is negative in II and III given tan = -4/3, and the tangent is negative in II and IV so must be in II I will assume you want to find sin( + π/6) , (the + sign is on the same key as = , you probably did not hit the shift key...
*Wednesday, December 7, 2011 at 7:39pm by Reiny*

**Trigonometry**

if csc > 0 , then sin > 0 the sine is + in I and II , by the CAST rule the tangent is - in II and IV , by the CAST rule so in in II so the 2nd question the same way. ( IV )
*Sunday, February 17, 2013 at 1:47am by Reiny*

**Chemisty II**

what mass due to waters of crystallization is present in a 3.38-g sample of copper (II) sulfate
*Thursday, March 18, 2010 at 4:41pm by Anonymous*

**Calculus - Limits. Check my answer, please! :)**

Suppose that h(x)={x^2-x+5 if x<2 {5 if x=2 {x^3-1 if x>2 Which of the following is equal to 7? I. lim h(x) x->2- II. lim h(x) x->2+ III. lim h(x) x->2 I only II only ***III only I and II only I, II, and III
*Sunday, October 6, 2013 at 11:44am by Samantha*

**Area of Circles**

Find the total area of three circles, each with a radious of 1 1/2 feet. Let ii stand for pie Te book gives the answer as 27ii/4 aprroimately 21.195 I know the equation and can calculate the 27. A=ii (1)^2 A=ii (1.5)^2=3 3 X 3 circles =27ii I am not clear where the 4 is coming...
*Saturday, May 9, 2009 at 2:05pm by G*

**Statistics**

Which of the following statements is not true about samples that can be treated as matched pairs data? I. Data collected on these samples is analyzed by calculating the differences between paired observations and using that data in one sample tests. II. Each value in the first...
*Saturday, January 12, 2013 at 5:52pm by Meow*

**Chemistry**

Which is/are not soluble in water? (I) NaOH (II) BaCO3 (III) AgCl (IV) (NH4)3PO4 (V) FeCl2 1. (I) only 2. (III) only 3. (V) only 4. (II) and (III) 5. (II) and (V) Is it 2. (III) only?
*Saturday, January 30, 2010 at 1:46pm by Anonymous*

**Chemistry**

How could tell a copper (II)sulfate solution from lead (II)nitrate or sodium sulfite if the solutions were not labeled ?
*Sunday, February 13, 2011 at 9:03pm by Jackson*

**Chem question Redox Stoichiometry**

A 2.80 mol/L solution of iron (II) dichromate is combined with 5.00L of a 2.25 mol/L acidic solution of tin (II) bromide. Calculate the volume of iron (II) dichromate required. FeCr2O7 + SnBr2 --> SnCr2O7 + FeBr2 Is this the right formula? or no?
*Wednesday, May 16, 2007 at 4:41pm by Mistra*

**math**

A medication is available in 30mg. tablets. A patient is given a prescription for gr. ii. How many tablets should the patient take? I am not sure how to work this problem out, and i am confused on the gr. ii. part, i do not know what it means, please help. thank you
*Tuesday, September 4, 2012 at 4:50pm by Angel*

**math, medical**

A medication is available in 30mg. tablets. A patient is given a prescription for gr. ii. How many tablets should the patient take? I am not sure how to work this problem out, and i am confused on the gr. ii. part, i do not know what it means, please help. thank you
*Tuesday, September 4, 2012 at 5:08pm by Angel*

**chem??????????????????**

YEs, it is the correct balanced equation bobpursley A 2.80 mol/L solution of iron (II) dichromate is combined with 5.00L of a 2.25 mol/L acidic solution of tin (II) bromide. Calculate the volume of iron (II) dichromate required. FeCr2O7 + SnBr2 --> SnCr2O7 + FeBr2 Is this ...
*Wednesday, May 16, 2007 at 6:32pm by bobpursley*

**math**

tan= -√5/2 , so must be in II make a sketch of a right-angled triangle with sides √5 and 2, the hypotenuse is √9 or 3 since tan = -√5/2 = y/x then in quadrant II, x = -2, y = √5 and r = 3 cos = -2/3
*Sunday, March 31, 2013 at 1:12pm by Reiny*

**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 ...
*Tuesday, August 21, 2012 at 8:27pm by NotGonnaSay*

**college chemistry**

Copper(II) sulfide reacts with oxygen to produce copper (II) oxide plus sulfur dioxide. Suppose you start this reaction with 50.0 grams of copper(II) sulfide and 50.0 grams of oxygen and you actually produce 33.5 grams of copper(II) oxide. Calculate the percent yield for the ...
*Wednesday, March 5, 2014 at 5:13pm by steven*

**chem - precipitation problems**

When hydroge sulfide gas is passed through a solution of lead (II) nitrate, lead (II) sulfide precipitates out. Write a balanced equation for this reaction and calculate an average rate, in mol/s for the reaction from this data: 1) at 0 seconds, mass of lead (II) sulide is 0 g...
*Tuesday, June 8, 2010 at 4:49pm by Capella*

**History**

I asked a question about the monarchs of England earlier, and I did my timeline. Except there are supposed to be 23, and I only have 22. I am not supposed to add the monarchs of the Hundred years War or the Wars of the Roses. Can someone please check to see if I am missing one...
*Saturday, May 17, 2008 at 10:13pm by Nathalie*

**Chemistry**

A 43.0 g sample of hydrated cobalt (II) sulfite is heated to drive off the water. The anhydrous cobalt (II) sulfite has a mass of 26.1 g. Calculate the mass of water. Calculate the moles of water. Calculate the moles of cobalt (II) sulfite. Calculate the mole ratio of water to...
*Friday, October 26, 2012 at 7:52pm by Elizabeth*

**chemistry**

Copper(II) sulfide reacts with oxygen to produce copper (II) oxide plus sulfur dioxide. Suppose you start this reaction with 50.0 grams of copper(II) sulfide and 50.0 grams of oxygen and you actually produce 33.5 grams of copper(II) oxide. Calculate the percent yield for the ...
*Wednesday, March 5, 2014 at 5:12pm by steven*

**Physics**

Well, final angular momentum is equal to intial. wf*If=wi*Ii where If= Ii+ mr^2 so solve for m change w to rad/sec
*Monday, June 29, 2009 at 8:14pm by bobpursley*

**Chemistry**

so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 ex....
*Sunday, February 16, 2014 at 1:38pm by Sam*

**Trig**

sin = .6 = 6/10 = 3/5 you should recognize the famous 3-4-5 right-angled triangle. so in quadrant II, construct your right-angled triangle in quadrant II sin = opposite/hypotenuse = y/r y = 3, r = 5 and in II, x = -4 so ... sin = 3/5 , csc = 5/3 cos = -4/5 , sec = -5/...
*Saturday, February 1, 2014 at 10:28pm by Reiny*

**MATH ALGEBRA**

Which of the following coordinates are intercepts of the linear relation 2x- 3y + 30 = 0 ? I. (0 , 10) II.(0 , 2/3) III.(-10 , 0) IV.(-15, 0) A. I only B. I and IV only C. II and III only D. II and IV only This was what I was trying to do: 2(0)-3(10) + 30 = 0 -30y +30 = 0 ...
*Wednesday, January 19, 2011 at 7:42pm by Anonymous*

**Chemistry check and help**

so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 ex....
*Sunday, February 16, 2014 at 7:45pm by Sam*

**chemistry.**

A student was asked to make some copper(II) sulfate-5-5 (CuSO4.5(H2O) BY reacting copper(II) oxide (CuO) with sulfuric acid. a) Calculate the molar mass of the copper (II) sulfate-5-water which is (64+32+64) + (10+80)=250 mol b)Calculate the amount (in mol) of copper (II) ...
*Saturday, October 24, 2009 at 6:17am by Denmark*

**chemistry**

Which of the following constants are needed to calculate the change in enthalpy (H) for heating a sample of liquid water at 10C to steam at 150C. I) the heat capacity of water II) the enthalpy of fusion of water III) the heat capacity of ice IV) the enthalpy of vaporization ...
*Friday, January 21, 2011 at 7:08pm by Bob*

**english**

Q.Fill in the blanks using appropriate words from the options given below!!! When we (a)_________ anything we always have to keep in mind our (b)_________. After all, except as an exercise, there would be little point in writing anything if it (c)_________ not going to benefit...
*Sunday, September 8, 2013 at 12:25am by satyajit(assassin)*

**English**

Is there any other reason Mama gives Walter the money in Act II, Scene II of A Raisin in the Sun besides that she loves him and she trusts him?
*Friday, August 24, 2007 at 9:38pm by Anonymous*

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