# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 145
1. ## algebra

The length of a rectangle is 4 inches more than twice the width. If the area of the rectangle is 48 square inches, what is the length of the rectangle? SHOW WORK. Thank you!!

asked by Tim on February 13, 2017
2. ## Math- Calculus

I need help with these problems, I cannot find a similar example to help me in the book: 1. Find lim x->infinity (e^(-2x) + sin x). 2. Find the derivative of sqrt(9-x) using the limit process. 3. Find lim x-> -infinity (x + sqrt(x^2 + 2x)). 4. Show that

asked by Amber on February 9, 2015
3. ## URGENT MATH please

Chris cuts half a rectangular lawn, 40m by 30m, by mowing strips of equal width around the perimeter. Jerri cuts the small rectangle in the middle that's left. How wide a strip does Chris cut so that they share the work equally? Solve by using quadratic

asked by 11th grade on March 27, 2012
4. ## math

Hi I wanted to check my work for this problem. Consider the points A(1,0,0) B(2,2,2) and C(0,2,1). 1) Find the vector CA x CB I got -2i -3j +4k for this 2) Find an exact value for the area of the triangle ABC. I got sqrt29/2 for this. 3) Plane II(1) is

asked by greg on April 19, 2017
5. ## Physics

Hi, I try to solve this problem with this formula and I can not get the right answer ! F2 = F1 ( R2/R1) A dentist's chair with a patient in it weighs 1790 N. The output plunger of a hydraulic system begins to lift the chair, when the dentist's foot applies

asked by maysam on November 17, 2006
6. ## SCIENCE

To solve the problem of a polluted stream a scientist traced where the pollution came from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of

asked by Anonymous on April 13, 2014
7. ## science

im stuck on this problem fill in the blank To solve the problem of a polluted stream a scientist traced where the pollution came from.She determines=d that the pollution was coming from many small sources.she worked on a plan to help reduce the pollution

asked by matt on March 23, 2014
8. ## Chemistry

Could a buffer system employing H3PO4 as the weak acid and H2PO4^- as the weak base be used as a buffer system within cells? Explain. I know the answer is no but I'm not really quite sure how to explain why.

asked by Candice on June 9, 2015
9. ## science

THe headwaters of three river system are located in Colorado along the Great Continental Divide. identify the 3 system? are they: Colorado river Missouri river and Columbia river.

asked by Anonymous on February 9, 2009
10. ## science

A group of wind turbines operates in an open field. Which statement about the wind turbines is true? Answer A. The wind turbines produce movement of air that does work. B. The wind turbines do work by using electricity to produce power. C. The wind

asked by Anonymous on April 30, 2013
11. ## Chemistry I - University Level

Suppose 5.87 g of barium acetate is dissolved in 300. mL of a 71.0 m M aqueous solution of sodium chromate. calculate the final molarity of barium cation in the solution. You can assume the volume of the solution doesn't change when the barium acetate is

asked by Jessica on September 27, 2015
12. ## Chemistry

Calculate the ratio of moles of CO2 produced to moles of the original gas mixture? A mixture of methane (CH4) and ethane (C2H6) is stored in a container at 294 mmHg. The gases are burned in air to form CO2 and H2O. If the pressure of CO2 is 351 mmHg

asked by Jenny on August 13, 2010
13. ## Chemistry

Calculate the ratio of moles of CO2 produced to moles of the original gas mixture? A mixture of methane (CH4) and ethane (C2H6) is stored in a container at 294 mmHg. The gases are burned in air to form CO2 and H2O. If the pressure of CO2 is 351 mmHg

asked by Jenny on August 13, 2010
14. ## Science- Chemistry

How many grams of sodium acetate( molar mass 82.03 g/mol) must me added to 1.00L of a 0.200M acetic acid solution to form a buffer of 4.20?Ka value for aceic acid is 1.8 x 10^-5. How do I go about finding the grams from the given information?

asked by Catherine on June 2, 2007
15. ## English

Your favorite cousin has moved to your town and is looking for a job. Her previous experiences are working as a cashier and sales clerk at two department stores. You know she plans to apply at similar stores in your town. But you also know she is a perfect

asked by Evelyn on January 16, 2013
16. ## Biology

Proteins are manufactured from the "blueprints" found on DNA. After they are translated, they are moved through a system of internal membranes before being distributed throughout the rest of the cell. At some point in this process, they are modified to

asked by ~ on August 14, 2017
17. ## politics

Which of the following is provided through the mechanics of pluralism, according to Robert Dahl? A. Elites can manipulate mass opinion. B. Aspiring leaders can distribute resources to gain influence. C. Aspiring leaders are limited in the ability to

asked by bev on May 29, 2017
18. ## math

Complete in Metric Conversions: A drainage system for a 40 acre field is designed to remove 3/8 inch of standing water from the entire field in 24 hours. What flow rate (gpm) must the drainage system achieve to meet the design specification? (283 gpm)

asked by Amy on March 27, 2012
19. ## scence

he movement of matter through the biosphere is different from the flow of energy in that particulart area which It is cycled through. Generally, the biosphere is a closed system, so matter remains fairly constant. Energy on the other hand, it enters and

asked by babygirl on May 19, 2017
20. ## home economics

As part of the nation’s recovery from the Great Depression of the 1930s, the banking system was reformed in which of the following ways? A. The government paid off loans for large corporations. B. The Federal Reserve Banks were closed. C. Banks were

asked by JC on August 22, 2012
21. ## finance

Your company will generate \$45,000 in cash flow each year for the next nine years from a new information database. The computer system needed to set up the database costs \$260,000. Assume you can borrow the money to buy the computer system at 8.25 percent

asked by Anonymous on October 1, 2012
22. ## Biochemistry

BSA stock solution A has a concentration of 3.50 mg/mL. 1.00mL of stock solution A is diluted to a final volume of 5.00mL to prepare solution B. 1.00mL of stock solution B is diluted to a final volume of 5.00mL to prepare solution C. 1.00mL of stock

asked by S on November 18, 2013
23. ## math

1.2(y + 1) for y = 2 A. 6 B. 5 C. 7 D. 8 Is it “A”? 2. The cost in dollars of a school banquet is 74 + 12n, where n is the number of people attending. What is the cost for 52 people? A. \$550 B. \$698 C. \$624 D. \$138 Is it “B”? 3. Write a word phrase

asked by anomynous on November 30, 2017
24. ## trigonometry HELP pleasE!

these must be written as a single trig expression, in the form sin ax or cos bx. a)2 sin 4x cos4x b)2 cos^2 3x-1 c)1-2 sin^2 4x I need to learn this!! if you can show me the steps and solve it so I can learn I'd be grateful!!! 1) apply the formula for sin

asked by jim on November 1, 2006
25. ## physics

A de-orbit burn, similar to that presented in the previous math problem, has been performed. During this de-orbit burn a pre-calculated ∆V (delta V, change in velocity) of 290 ft/s (or 88.4 m/s) will be used to decrease the Shuttle’s altitude from 205

asked by Levi B. on January 20, 2012
26. ## Math

1. use the law of Sines to solve (if possible) the triangle for the value of c. A=27.5degrees, a=15cm, b=36.4cm 2. use the law of Sines to solve (if possible) the triangle for the value of c. B=52degrees, a=8cm, b=12cm How do I solve these type of

asked by mysterychicken on June 4, 2013
27. ## Science

To solve the problem of a polluted stream a scientist traced where the pollution came from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of

asked by Anonymous on April 3, 2014
28. ## science

To solve the problem of a polluted stream a scientist traced where the pollution came from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of

asked by Anonymous on April 3, 2014
29. ## science

Study the scenario. Two trains are moving along a train track at 45 mph towards each other. The first train has twice the mass of the second train. The trains spot each other, and apply the brakes at the same time. Both come to a stop, and disaster is

asked by dianni on January 16, 2019
30. ## MATH

In Triangle ABC, medians BE and CD are produced respectively to points X and Y such that CD=DX and BE=EY as shown in the figure. Show that the points X, A and Y are collinear. Also show that A is the mid point of XY

asked by PRIYA on March 11, 2016
31. ## statistics

From experience, an airline knows that only 80% of the passengers booked for a certain flight actually show up. If 8 passengers are randomly selected, find the probability that fewer than 7 of them show up.

asked by george on March 20, 2014
32. ## Math

In Triangle ABC, medians BE and CD are produced respectively to points X and Y such that CD=DX and BE=EY as shown in the figure. Show that the points X, A and Y are collinear. Also show that A is the mid point of XY

asked by Somanna on June 5, 2015
33. ## math

the ice show went for 15 consecutive nights with a full house each night.If the stadium could seat 852 people,how many people saw the show?

asked by amy on October 22, 2014
34. ## Chemistry (Re-post)

A solution contains 1.694 mg of CoSO4 (MW 155.0) per mL. Calculate a) The volume of 0.008640 M EDTA needed to titrate a 25.00 ml aliquot of this solution. So this is my working out for this section, Step 1. Moles of CoSO4 = 0.0001694mg * 25mL *

asked by Sam on January 21, 2015
35. ## Math

On a grid with points R(-2,-6)& S(3,4), what is the slope of line RS? I don't know how to find the slope. Thank you. The formula for a straight line is y = mx + b m is the slope and b is the y intercept. One way is to plug in the two sets of points listed

asked by Joshua on June 26, 2007
36. ## Chemistry

A solution of is prepared by adding 50.3ml of concentrated hydrochloric acid and 16.6ml of concentrated nitric acid to 300ml of water. More water is added until the final volume is 1.00L. Calculate (H+) (OH) and the PH for this solution. Hint concentrated

asked by Fai on August 11, 2012
37. ## chemistry

In a laboratory experiment, a 18.0 ml sample of NaCl solution is poured into an evaporating dish with a mass of 24.00 g. The combined mass of the evaporating dish and NaCl solution is 37.15g. After heating, the evaporating dish and dry NaCl have a combined

asked by Allyse on October 9, 2010
38. ## Chemistry

Consider an ideal gas encloesd in a 1.00 L container at an internal pressure of 10.0 atm. Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 20.0 L. w = ____ J now calculate the work done if this

asked by Lauren on February 10, 2012
39. ## Calc 1

Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it. lim x→0 (sin^−1 x)/7x Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it. lim

asked by TayB on April 20, 2015
40. ## social studies

A socialist economy is characterized by: A. an extensive reliance on markets to allocate final goods and services. B. an extensive reliance on the profit motive to govern resource allocation decisions C. elimination of the problem of scarcity since all

asked by ciara on December 20, 2010
41. ## statistics

In studying the responses to a multiple-choice test question,the following sample data were obtained. At the .05 significance level, test the claim that the responses occur with the same frequency. show work for test statistic & p. response a b c d e/ 12

asked by Dhelp on October 26, 2016
42. ## statistics

Would someone mind checking me and pointing out which may be incorrect. I THINK I get it but.... Calculate the range, variance, standard deviation for the data set given 72, 80, 80, 82, 88, 90, 96? I just wanted to know if I am doing this correctly. These

asked by Flower on September 10, 2010
43. ## Physic

A massless rope is wrapped around a hollow cylinder of radius 23 cm whose central axis is fixed in a horizontal position. A mass of 3.8 kg hangs from the rope and, starting from rest, moves 137 cm in 2.2 s. What is the mass of the cylinder? (Answer: 62kg)

asked by Anonymous on May 6, 2014
44. ## chemistry

What formula do I use to calculate the mass of KCl that is required to make 625 mL of a 0.200 M solution? Dr Robb the formula you gave me didn't give me the correct answer and I think I did it wrong it is asking for the answer in grams which should be 9.3

asked by Norma on July 26, 2010
45. ## chem class

Our teacher told us we had to do problems on our final on Delta G and S...? all he said is we'd have to plug in numbers from a list and solve. but im very confused. but the numbers he gave in the example are different from my book, is there soemthing we

asked by ben on December 13, 2010
46. ## Maths

P=(2J+1)exp(-(BJ(J+1))/kT) where B, k and T are constants a. Show that dP/dJ=(2-(B(2J+1)^2)/kT)exp(-BJ(J+1)/kT) b. Show that P exhibits a maximum and determine the expression for Jmax c. Find the value of P when J=0 and the limiting value of P when J

asked by Alice on October 28, 2008
47. ## Math

You have three toonies and two loonies in your pocket. You pull one coin out and then pull out another (without replacing the first) 1) show the total of all the probabilities is 1 2) show using combinations that part 1) is correct

asked by Peter on July 14, 2015
48. ## Chemisty Help

for each of the molecules below, show the dipole you would expect. you must show the direction of the dipole - arrow head pointing toward the negative end. 1) CF4 2) CH3Cl

asked by Jessica on April 9, 2012
49. ## Sci

I want to do a science project like i am going to show two different ecosystem and predict and show which one is more polluted and what happens during global warming???? What my hypothesis going to be then??? Also.... What Future Refrences do I need To Get

asked by Alisha on June 12, 2010
50. ## Physics

GP. A speedboat increases it's speed uniformly from V1=20.0m/s to Vf=30.0m/s in a distance of 200X10^2m. (a) Draw a coordinate system for this situation and label the relevant quantities, including vectors. (b) For the given information, what single

asked by Anonymous on April 22, 2019
51. ## Physics

Two 2.00kg balls are attached to the ends of a thin rod length 50.0cm and negligible mass. The rod is free to rotate about a horizontal axis at the center, without friction. With the rod horizontal, a 50.0 gram glob of putty drops onto one of the balls,

asked by Lil on January 4, 2011
52. ## science-chem

first, thanks so much Bob for helping me!!!! Q4.you will be asked to prepare 25.0 mL of a 0.019 M solution of sodium chloride during this experiment.... a.calculate mass of sodium chloride needed to prepare solution. (0.25L)(0.019M NaCl/L)*(58.5g

asked by Ally on September 17, 2009
53. ## Geography

Can someone check these for me? 1.What problem has been at the heart of the intense political struggles in Central America? Unequal distribution of usable land is the heart of the political struggle. There is a shortage of farmland in order to meet the

asked by Ella on March 23, 2012
54. ## Maths (Need Help)

A(0,1) B(-2,3) C(2,-1) are the vertices of a triangle ABC. P and Q are the midpoint of the side AB and AC. (a) find the equation of PQ, (b) show that PQ is parallel to BC. (c) show the length PQ = 1/2 length BC.

asked by SAMA on April 3, 2016
55. ## chemistry

I have a lab finished and I have to find the dehydrated sample (show calculations) and the value of n (show calculations). I just need to know how I go about finding these answers using my data?

asked by Ashley on February 19, 2015
56. ## plz plz help me belive me have tried

cosx+cosy=a and sinx+siny=b show that sin2x+sin2y=2ab(1-(2/(a^2+b^2)) plz plz show step

asked by maths on November 2, 2016
57. ## Science

I am doing an Animal project , I need a picture to show how an animal had bilateral symmetry! I couldn't find any pictures that could actually show that. Can you pleas help me? Thank you

asked by Melody on November 14, 2016
58. ## Math

Write and solve a system of equations for each situation. 1.Your school sells tickets for its winter concert. Student tickets are \$5 and adult tickets are \$10. If your school sells 85 ticket and makes \$600, how many of each ticket did they sell? -Could

asked by Shadow on October 30, 2011
59. ## Chemistry

A solution contains 1.694 mg of CoSO4 (MW 155.0) per mL. Calculate a) The volume of 0.008640 M EDTA needed to titrate a 25.00 ml aliquot of this solution. Step 1. 0.001694g * 25ml * 1/155 g/mol= 0.0002732 mol Step 2. Volume of EDTA needed = 0.0002732 mol/

asked by Sam on January 21, 2015
60. ## Math

My seven year old was set this question and I was asked to solve. Help please. Here is the question: My number has 5 tens. The ones digit is less than the tens. What could the number be? My solution was 5 x 10 = 50. Then subtract 1 from the tens = 49 is

asked by Gary on October 9, 2016
61. ## mechanics: simple harmonic oscillation

Consider an ideal spring that has an unstretched length ℓ and a spring constant k. Suppose the spring is attached to a mass m that lies on a horizontal frictionless surface. The spring-mass system is compressed a distance of x_0 from equilibrium and then

asked by student1618 on September 3, 2015
62. ## Biology

Help with my course work 3 strips of potatoes of equal sizes are put into water, weak sucrose and strong sucrose solution. As far as prediction goes I know happens. But what is the aim of this experiment? I came up with this aim- To illustrate movement of

asked by Anonymous on November 4, 2009
63. ## Chemistry

The standard solution of FeSCN2 (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.550. If a trial's absorbance is measured to be 0.350 and its initial concentration of SCN– was 0.0010 M, the equilibrium

asked by Blair on August 8, 2008
64. ## Physics

A 50g tennis ball is thrown with a velocity of 12 m/s. It strikes a wall and rebounds with a velocity of 10 m/s. a) What is the ball's initial and final momentum? b) what is the impulse on the ball? c) Thje ball is in contact with the wall for .10 second.

asked by Jack on April 15, 2013
65. ## maths

A and B can finish a piece of work in 16 days and 12 days respectively. A started the work and worked at it for 2 days.He was then joined by B.Find the total time taken to finish the work.

asked by Anonymous on February 13, 2015
66. ## window 2003 server

You are working on a Windows Server 2003 system that has just been installed by another administrator. The administrator completed the installation but did not make any configuration changes following the installation. While checking the maximum log sizes

asked by ajay on February 1, 2007
67. ## English

I write again,bcause yesterdeay nobody could really help we with this homework :( Hello everybody! Today a I have to write a complain letter to "my"boss.I should write about my difficulties,and about what's bothering me. In the letter I should propose a

asked by Lulu on April 15, 2010
68. ## AP Chemistry

1. Equilibrium 2SO3(g) O2(g) + 2SO2(g) A 3.21g sample of sulfur trioxide is placed in a 2.25 L cylinder and allowed to reach equilibrium at a constant temperature of 500 , as shown in the above equation. Analysis shows 1.23 X 10^-2 mol of sulfur dioxide at

asked by anonymous on April 10, 2007
69. ## Chemistry

A solution of hydrogen peroxide, H2O2 , is titrated with potassium permanganate, KMnO4 , according to the following equation: 5 H2O2 + 2 KMnO4+ 3H2SO4 -> 5O2 + 2 MnSO4 +8H2O + K2SO4 It requires 46.9mL of 0.145 mol/L KMnO4 to titrate 50.0 mL of the solution

asked by Brenan on March 30, 2008
70. ## Chemistry

A compound D, CH3CHCLCH2CH3 was boiled under reflux for some time with dilute NaOH solution.. Dilute nitric acid was then added to the mixture, followed by dilute silver nitrate solution. A Few drops of concentrated ammonia solution were then added. What

asked by Aboi on December 15, 2014

the human endocrine system is made up of which of the following structures? (1 point) vessels receptors* glands chambers 2. Which of the following best describes the function of the endocrine system? (1 point) It secretes chemical messengers that travel

asked by Justin Bieber on March 25, 2015
72. ## Chemistry

Sodium Azide, (NaN3), the conjugate base of hydrazoic acid, is sometimes added to water to kill bacteria. Given a 0.010 M solution of sodium azide, A) What is the [H+] concentration from the Azide base rxn? B) Given a 0.01 M NH4+, what is the [H+]? C) What

asked by Lovey dovey on May 31, 2013
73. ## physics

How can I calculate the tension in the two cords that are labeled A and B in a two mass system? Cord A is on top with a 1 kg mass attached and Cord B connects this mass to a 2 kg mass. The two mass system accelerates directly upward at 2m/s^2.

asked by Josh on November 21, 2009
74. ## Plant Physiology

Hey i have a mid term today at 3 , and this one sample question my prof posted online. If someone can please show me how to get the answers i would really appreciate it: A plant cell is found to have a Ψs = - 0.7 MPa and a Ψp = 0.5 MPa. Is this cell

asked by Saira on February 13, 2009
75. ## Chemistry, help!

how do you calculate this: Calculate the mass of copper needed to displace 5.0g of silver from silver nitrate solution. (Relative Atomic Masses: Ag=108, Cu=63.5) Eqn=Cu+2AgNO3->Cu(NO3)2+2Ag How do you write a half equation? Complete the half equation to

asked by Anonymous on January 20, 2008
76. ## writing paragraphs and sentences

Background Your favorite cousin has moved to your town and is looking for a job. Her previous experiences are working as a cashier and sales clerk at two department stores. You know she plans to apply at similar stores in your town. But you also know she

asked by Anonymous on March 17, 2009
77. ## math, algebra, word problems

Greg and Gary start a bicycle race at the same place and time.Greg travels at a constant speed of 16 miles/hour and Gary at a constant speed of 12 miles/hour. Greg finishes the race 2 hours ahead of Gary. How many miles did Greg travel in the race? Please

asked by Pearl on February 18, 2018
78. ## Chemistry

A solution containing a mixture of metal cations was treated with dilute HCl and no precipitate formed. Next, H2S was bubbled through the acidic solution. A precipitate formed and was filtered off. Then, the pH was raised to about 8 and H2S was again

asked by Brunost on April 7, 2013
79. ## Chemistry

100.0cm3 of 2.0mol dm-3 hydrochloric acid is mixed with 2.5g of magnesium oxide powder. The mixture is stirred until no further change occurs. The resulting solution still contains excess hydrochloric acid. Calculate the volume of 1.5mol dm -3 sodium

asked by Angeles on August 27, 2017
80. ## science help PLS

A nuclear power plant produces huge amount of electricity. However, it dumps radioactive wastes into the sea. This has led to an increase in illness among people living along the coast. Which of these is the best method to solve this problem? Increase

asked by Oscar on April 12, 2016
81. ## math/science

Since the SI unit for temperature is Kelvin, why is the Celsius scale most often used in the science labs? I don't know that it IS the most often used. For example, almost all of the calculations require changing from C to K (gas law problems, and almost

asked by carter on August 15, 2006
82. ## Chem

A patient receives 3.5 L of glucose solution intravenously (IV). If 100. mL of the solution contains 5.9 g of glucose (carbohydrate), how many kilocalories did the patient obtain from the glucose solution?

asked by Asia Thomas on September 23, 2016
83. ## Chemistry

I have a 2.5g sample in 12.5ml solution.I'm supposed to do a spike into this solution with the sample.If my standard concentration is 2000ppm, how much of this solution should I use such that I get 200ppm spike in sample?

asked by chloe on August 31, 2010
84. ## math

A scientist is mixing a chemical solution for an experiment. The solution contains 3/8oz of chemical and 1/6 ounce saline solution. What is the rate of chemical to saline?

asked by Eli on December 18, 2014
85. ## Chemistry

16.6ml of a solution is run into an empty flask. the mass of the flask is 145.0 g. the mass of the flask plus solution is 158.5 g. what is the density of the solution?

asked by Gabby on January 23, 2016
86. ## Chemistry

An aqueous solution of barium nitrate has a density of 1.09 g/cm3. The solution is 18.7% barium nitrate by mass. How many nitrate ions are present in 87.6 dL of this solution?

asked by Cj on September 26, 2014
87. ## chemistry

What is the molarity of the resultant MgCl2 solution formed by mixing 100 cm3 of 0.5 M MgCl2 solution and 150 cm3 of 0.9M MgCl2 solution?

asked by rebeca on December 11, 2010

I am supposed to fill in the blanks without a word bank. 1. I you push a crate with 40 N of force at an angle of 30 degrees and your friend pushes with a force of 40 N horizontally, the amount of work you are doing is _____ the amount of work your friend

asked by Liz on July 2, 2014
89. ## physics

Two children, each with mass m = 11.0 kg, sit on opposite ends of a narrow board with length L = 4.5 m, width W = 0.30 m, and mass M = 9.4 kg. The board is pivoted at its center and is free to rotate in a horizontal circle without friction. What is the

asked by Katie on March 16, 2012
90. ## bobpursly,.math

Ok, assume it equals zero. 2x + 3y -6=0 subtract 3y from each side. add six to each side. divide both sides by two. its how its in the book i'm suppost to solve for x. but how? How do I solve for the following: Directions solve each literal equation for

asked by bobpursley on December 19, 2006
91. ## Chemistry

WOULD THE VOLUME OF A 0.10M NAOH SOLUTION NEEDED TO TITRATE25.0ML OF A 0.10M HNO2 ( A WEAK ACID)SOLUTION BE DIFFERENT FROMTHAT NEEDED TO TITRATE 25.0ML OF A 0.10M HCL (A STRONGACID)SOLUTION?

asked by Naomie on June 12, 2013
92. ## Chemistry

A 25cm aliquot of ammonium iron 2 tetraoxomanganate 7 containing 39.2g of its salt in 250cm solution, needed 25cm of potassium tetraoxomanganate 7 solution for a colour change to occur. What is the concentration of the potassium tetraoxomanganate 7

asked by Rose on February 26, 2018
93. ## algebra 2

solve: 3+2(1-x)>6 i got -11/2 no Here is what I got: 3+2(1-x)>6 3 + 2 - 2x > 6 -2x > 1 x < -1/2 what about the 3+2? i have to graph the solution set on a number line. What about the 3+2 ???? What a strange question re this problem What level of math are

asked by anonymous on July 27, 2007
94. ## chemistry

how do you solve this What is the pH of the solution created by combining 2.60 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH 2.60 pH wHCl: _ pH wHC2H3O2 : _ Complete the table below: What are

asked by Jin on July 12, 2010
95. ## math-algebra

How do you solve the following problems: What is the area of a square with the length of a side equaling 3a^5? I got (3a^5)(3a^5)=9a^10 is that correct?? What is the area of the rectangle with the width of 6x^2 and the length of 12x^3? I got 6*5^2=900;

asked by donutsforlifebruh on January 6, 2015
96. ## ALGEBRA1

carlotta subscribes to the HotBurn music services. she can download no more than 11 song files per week. Carlotta has already downloaded 8 song files this week. write, solve, and graph an inequality to show how many songs charlotta can download. a)s>3

asked by jenika on May 8, 2012
97. ## Physics

please show me how to solve these: 1. Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144 km on a straight highway? answer=3.00 h 2. How much time would Simpson save by increasing his average

asked by y912f on January 30, 2009
98. ## math

PLEASE HELP ME WITH THIS TRIGONOMETRY QUESTION!!? Edit Express each of the following in terms of another angle between 0 degrees and 180 degrees a. sin 50 degrees b. sin 150 degrees c. cos 45 degrees d. cos 120 degrees Update: we have not yet learnt it in

asked by becky2000 on September 2, 2016
99. ## math,algebra

can someone help me create one statement in english representing an algebraic representation. previously someone helped me out but that wasn't what they were looking for someone gave me: a squared plus b squared equals c squared. the instructor said that

asked by jasmine20 on January 1, 2007
100. ## Pls sir Steve or Damon or rainy help me to learn

1.for any 2 non-zero integers x and y there exist a unique integer q and r called the quotient and remainder respectively such that x=yq+r where

asked by Matt/maths on March 7, 2018