# 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 173-
## chemistry

So I posted this question yesterday and was told I had a few typos.... I fixed them and here is the question again... Please help me!!! A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The

*asked by amy on January 5, 2010* -
## Psychology

In her lecture concerning scientific method, Dr. Smith insisted that each of the steps must be used in order to arrive at a scientific finding. She included directions to __________ in her list of necessary components. (Points: 5) form a question and

*asked by Lisa on January 22, 2011* -
## Physics

An ice chest at a beach party contains 12 cans of soda at 3.05 °C. Each can of soda has a mass of 0.35 kg and a specific heat capacity of 3800 J/(kg C°). Someone adds a 7.15-kg watermelon at 25.0 °C to the chest. The specific heat capacity of watermelon

*asked by Sara on November 17, 2006* -
## cHEMISTRY

If a precipitation reaction occurs, when a solution of one substance is added to a solution of the other, enter the formula and state of the spectator ions. Separate by comma. If there is no reaction, enter the formula and state of all ions in solution.

*asked by Keri on February 18, 2010* -
## CHEMISTRY

brass is a subtitutional alloy consisting of a solution of copper and zinc. a particulae sample of red brass consisting of 80% copper and 20% zinc by mass has a density of 8750kg/m^3. a. what is the molality of zinc in the solid solution and B. what is the

*asked by lulu78 on October 14, 2010* -
## Organic Chemistry

The solubility of compound A in ethanol is 0.5 g per 100 mL at 0oC and 5.0 g per 100 mL at 78oC. (a) To make a hot, saturated solution of 15.0 g of A at 78oC, how much ethanol is required? (b) When the solution prepared in is cooled to 0oC, how much of

*asked by Mac on September 24, 2014* -
## science

6g of impure NaOH was dissolved in 100ml of a solution.0.25molar solution of the base utilize 27.6ml of the solution containing 6g of trioxonitrate(5)acid.calculate (a)molar concentration of acid (b) molar concentration of base (c) mass of the base (d) %

*asked by chm 101 on January 19, 2013* -
## Math

Hello, I have a probability problem on combination that is not easy to solve for me, and I need help. Thank you. Probleme: Problem: Little Caesar's Pizza had a commercial on tv that said you could buy 1 pizza and get another one free, with up to 5 toppings

*asked by bikie on April 5, 2011* -
## algebra

please review the questions and table and check my answers. tank you tutors. table planets' orbital velocity planet orbital velocity (mi/s) mercury 29.74 venus 21.76 earth 18.5 mars 14.99 jupiter 8.12 saturn 6.02 uranus 4.23 solve. show your work. express

*asked by anon on September 24, 2015* -
## chemistry

A 0.25 mol/L solution of benzoic acid, KC7H5O2 and antiseptic also used as a food preservative, has a pH of 2.40. Calculate the Ka of benzoic acid at SATP My work: C6H5COOH --> C6H5COO^- + H^+ Ka = (C6H5COO-)(H+)/ C6H5COOH I know my next steps are to use

*asked by Dustin on April 7, 2008* -
## Math

I have a word problem with fractions. Anna estimated that her brother Nick ate about 1/3 of an apple pie, her brother Matt ate 5/8 of the pie, and she ate about 1/4 of the pie. How might you convince Anna that her estimates do not make sense? Be sure to

*asked by Robert on January 23, 2013* -
## math

still can't solve .32x + .20y = 3.92 it's my last math question for the day!!!! What do you mean solve it? suppose you bought some 32 cents stamps and some 20 cents stamps. you spent $3.92 for 16 stamps. how many of each stamp did you buy? i got the

*asked by betty on February 1, 2007* -
## Math

Solve simultaneously for the two equations for x and y 5x(cos 45) + 15y(cos 30) = 2,000 5x(sin45) - 15y(sin 30) = 0 I tried adding these two eqn. to elimate y and solve for x by adding [5 x cos 45] and [5 x sin 45] but the value for x is too high. Would I

*asked by Rose on December 5, 2015* -
## algebra

Solution A is 25% acid and Solution B is 40% acid. How much of each is needed to make 60 liters of a solution that is 30% acid?

*asked by hanaa on April 13, 2008* -
## algebra

Solution A is 25% acid and Solution B is 40% acid. How much of each is needed to make 60 liters of a solution that is 30% acid?

*asked by hanaa on April 13, 2008* -
## math show work please

1/(X+3)+4/(x+5)= 2/(x^2+8x+15) a. the solution set is b. the solution set is all real numbers c. the solution set is empty

*asked by wally on November 25, 2014* -
## Math

How many milliliters of a 75% acid solution must be added to 90 ml of a 10% acid solution to make a 25% acid solution?

*asked by Jason on February 3, 2010* -
## chemistry

If you mix 20.0 mL of a 3.00 M sugar solution with 30.0 mL of a 5.57 M sugar solution, you will end up with a sugar solution of_______.

*asked by Angela on November 19, 2010* -
## math

How many milliliters of a 75% acid solution must be added to 90 ml of a 10% acid solution to make a 25% acid solution?

*asked by Jason on February 3, 2010* -
## Alegebra

Solution A is 60% alcohol and Solution B is 30% alcohol. How much of each is needed to make 30 gallons of a solution that is 40% alcohol

*asked by Thomas on May 13, 2013* -
## algebra

How many mL of a 60% acid solution must be mixed with a 20% acid solution to produce 200 mL of a 50% acid solution?

*asked by Paige on September 9, 2014* -
## algebra1/McDougal Littell

Is this problem correct?I'm trying to solve the equation. 8xt7=4x-5 x=2 I don't understand what you mean by 8xt7. Do you mean 8x+7? Is this problem correct? 8x+7=4x-5 x=2 nope the answer id -3....if u plug in 2 it would be 23=3...they don't equal to each

*asked by toni on November 12, 2006* -
## AP Chem

An electrochemical cell consists of a nickel metal electrode immersed in a solution with [Ni2+] = 1.0 M separated by a porous disk from an aluminum metal electrode. (a) What is the potential of this cell at 25°C if the aluminum electrode is placed in a

*asked by Halie on April 1, 2011* -
## college chem

. Jack Daniels Tennessee whiskey is 40.00% ethanol by volume. However, % alcohol by mass is quite different from % by volume. The molality of ethanol in an aqueous solution that is 40.00 % ethanol by volume is 10.88 molal. A) Find the % ethanol by MASS,

*asked by josh on March 9, 2010* -
## Math

A 9 percent salt-water solution is mixed with 4 ounces of an 18 percent salt-water solution in order to obtain a 15 percent salt-water solution. How much of the first solution should be used?

*asked by Jeanne on September 1, 2010* -
## Chemistry

24) It was found that a 20.00 mL portion of a solution of oxalic acid, H2C2O4, requires 6.69 mL of 0.200 M K2Cr2O7 for complete reaction in an acidic solution. In the reaction, the oxidation product is CO2 and the reduction product is Cr3+. How many

*asked by Luke on July 1, 2014* -
## Math Word problems

an office where 8 secretaries work 8 hours a day 5 days a week decided it needs 336 hours a week of secretarial work. How much more or less will each secretary have to work each week to equally share the 336 hours.

*asked by april on February 12, 2013* -
## Math

Esther drove to work at 45 miles per hour. Returned home at 30 miles per hour. If Esther spent a total of one hour commuting to and from work, how many miles did Ester drive to work in the morning?

*asked by Bob on January 17, 2016* -
## financial management

Part I: Compute the worth of Arcadia Hospital in 2005 using rules of thumb, adjusted book value, and discounted cash flow valuation (for this final method, use the table provided). Assume the cash flow for 2005 is the same as 2006. 1) Rules of thumb: 2)

*asked by amanda on April 10, 2009* -
## check geo

In the 1800s_____ opened up the western U.S to immigration and buisiness. A)the transcontinental B)the underground railroad c)route 66 D)cattle farming 1)a Canada was originally a ______ of great britian. A)dominion B) confedracy c) loyalist system d)

*asked by henry on August 17, 2009* -
## physics-speed

i need help with this one thanks A particle starts from rest and is acted on by a net force that does work at a rate that is proportional to the time t. The speed of the particle is proportional to: a. sq. root t b. t c. t^2 d.1/sq. root t e. 1/t Work done

*asked by Damon on August 7, 2007* -
## math

clearly define variables. set up the equations.How many gallons of a 30% alcohol solution must be mixed with 60 gallons of a 14% solution to obtain a solution that is 20% alcohol? x represents? y represents? equation 1? equation 2?

*asked by jiya on March 1, 2016* -
## Chemistry

Suppose you have 1 l of acid solution. With a pH of 2" , you add 1 l of pure water to it, wat happens to the pH of the solution? Explain! Is it correct if i state: the pH of the acid solution becomes neutral since pure water is neutral??

*asked by Jessie on February 21, 2013* -
## science chemistry

1000g of a 55%(mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution.how many liters of water should be added to the starting solution?

*asked by Muhammad on November 5, 2012* -
## Chemistry

1000 g of 55%(mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution. How many liters of water should be added to the starting solution?

*asked by Wube on May 2, 2012* -
## science chemistry

1000g of a 55%(mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution.how many liters of water should be added to the starting solution?

*asked by Muhammad on November 5, 2012* -
## Math

A certain slow clock loses 15 mins every hour. Suppose the clock is set to the correct time at 9 AM. What will the correct time be when the slow clock first shows 10 AM? Show your work. Also, does to lose an hour mean to go forward or fall back an hour?

*asked by Anonymous on January 26, 2016* -
## physics please help

black bart and wyatt earp have a race. wyatt moseys 400m in 58.0s and bart moseys the same distance in 60.0s. by what Distance does wyatt beat bart in this race? Please show all work would greatly appreciate have a test coming up and i don't understand at

*asked by unknown on December 19, 2014* -
## algebra

The time,t, required to drive a certain distance varies inversely with speed,r. If it takes 12 hours to drive the distance at 60 miles per hour, how long will it take to drive the same disatcne at 85 miles per hour? about 7.08 hours? about 5.00? or 8.47

*asked by PLEASE HELP ASAP on May 20, 2015* -
## algebra

solve the polynomial y=2x^2-4x+1 For Further Reading algebra - Reiny, Thursday, May 17, 2007 at 10:34pm I am sure neither your text nor your teacher asked you to "solve the polynomial y=2x^2-4x+1 " are you graphing the function, or are you solving the

*asked by Haylee on May 18, 2007* -
## Math-Trig

1. Create an algebraic expression for sin(arccosx-arcsin3x) 2. The cosx=4/5, x lies in quadrant 4. Find sin x/2 3.Determine all solutions in (0,2pie) for sin4xsin^2x=3, cot^2v(3-1)cotx=v(3), cos^2x=cosx, and tan^2x-6tanx+4=0 4. Solve; sin(∏/2-x)=1/sec 5.

*asked by Hujinson on April 14, 2009* -
## CHEMISTRY

Solution A has pH of 4.6 and solution B has a pH of 8.0 1- What is the (H3O+) in solution A? 2- What is the (OH-) in solution B ?

*asked by Lynne on June 3, 2010* -
## Biology

1. In an experiment, a man drank a litre of water, his urine output increases so that after hours he had eliminated the extra water. When he drank a litre of 0.9% of sodium chloride (common salt), there was little or no increase in his urine production.

*asked by Uduak on March 22, 2007* -
## Art

An environment artist created a piece in protest of trash. Anticipation negative public reaction, the artist decided to display the work anyway. what is the most likely reason? 1. The artist believed that the purpose of the work was to stir up awareness 2.

*asked by Shown on February 5, 2016* -
## Math

2 teams played each other recently. Team 1 scored N points, while team 2 scored M. 1

*asked by CT on April 5, 2010* -
## Chemistry

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* -
## 8th grade math

The time is now between 3 and 4 o'clock. Fifty-four minutes ago, the number of minutes past 2 o'clock was twice the number of minutes that it is now before 4 o'clock. How many minutes before 4 o'clock is it? Show and explain work

*asked by mark ,I need help on February 26, 2012* -
## math

(4-y^2)/(y-2) = y/2 (4-y^2)/(y-2) = y/2 4 - y^2 = (y*(y-2))/2 4 - y^2 = (y^2-2y)/2 8 - 2y^2 = y^2 - 2y 3y^2 - 2y - 8 = 0 (keep the above equation in mind) quadratic formula: (-b +/- sqrt(b^2 - 4ac))/2a now solve by plugging in the appropriate numbers and

*asked by math on October 30, 2006* -
## accounting

I continue getting the wrong totals can you please help me solve this problem and give me the correct formula and Journal entries. On Jan 1 2004 Brown Airways purchased an airplane for 34,450,000. Brown airways expect the plane to remain useful for 6 years

*asked by Ronnie on January 1, 2010* -
## English

What kind of work is done by volunteers? 1. To help the handicapped to take baths and have meals. 2. To take care of children in/at orphanages. 3. To care for sick people/patients at hospitals. 4. To clean dirty places such as rivers, seas, and mountains.

*asked by rfvv on November 25, 2009* -
## chemistry

Please help ~~ Because i don't ever know the reaction in organic compound .. Do anyone has the data bank of the organic chemicals ? I cannot find out what are the compound in the reaction with it ~~ 1. What do butylamine give when it is dissolved in water

*asked by initial D on December 4, 2008* -
## Chemistry

In a lab we are doing, we need to find the theoreical amount of NaCl that we should have left after evaporating the water off an NaCl solution. our molarity of the solution was .100 +/- .6%. We made a stock solution of .5836 g of NaCl/ 100 mL of water. We

*asked by Chris on September 27, 2006* -
## math

You worried about math last year for 300,000 minutes. this year you will worry about math for only 60 minutes.What percent decrease in minutes of math worry will you experience this year? please explain and show work.

*asked by Johnny on July 1, 2014* -
## algebra 2

With the wind, a jet can fly 2500 km in 2 hours and 30 minutes. Against the wind, it can fly only 2000 km in the same time. Find the rate of the jet if the rate of the jet if the rate of the wind is 100 km/hr. Please Show All Work!

*asked by Trisan on October 18, 2009* -
## History help

I need help on these true/false questions. if false, i have to write what the correct word is. i need help in being steered towards the right answer! 1. the process of handing out jobs to ones supporters is known as "citizen system" 2. racial seregation in

*asked by Kasey on October 26, 2006* -
## Chemistry

Step 1: A 12.70mL sample of cyanide solution was mixed with 25.00mL of a solution of nickel ions at an appropriate pH to form the Ni-cyanide complex. The resulting solution was titrated cs 0.0130M EDTA and required 10.10mL to reach the end point. Step 2:

*asked by Catherine on March 24, 2015* -
## chemistry

A 20.00 ml stock sample of HBr is diluted to 50 mL. If 18.76 ml of 0.1345 M KOH was required to reach the equivalence point, what is the concentration of the stock HBr solution? Is my answer correct? Titration problems can be solved with the MV=MV

*asked by Vana on September 22, 2008* -
## Chemistry

The solubility of insoluble substances changes depending on the nature of the solution. Below are two solutions in which Cu(OH)2 is dissolved; in each case, the solubility of Cu(OH)2 in those solutions is not the same as it is in pure water. (a) For each

*asked by Henry on February 19, 2015* -
## biology help

color blindness is a sex linked disorder caused by recessive allele on the X chromosome. XC= normal vision. Xc= color blind. if a normal vision man marries a color blind woman, what are the chances that they will have a color blind son? what a color blind

*asked by bioman on July 19, 2011* -
## Feedback/Features

Hope this is allowed! I have some cool features here that I think should be added to jiskha. 1. A notification system Whenever I go on jiskha and need a question answered, I always have to refresh every so often and usually have to respond 5-15 minutes

*asked by cAt.ExE HaS sTopPeD wORkInG on October 29, 2018* -
## Social Studies

2. How did World War 2 affect life in Georgia? (Choose all that apply.) A. More Georgians were out of work than ever before B. Many pepole moved to the North or West C. Pepole made sacrifices for the war effort. D. African american Georgians moved to the

*asked by Error 00110G.110001A.110001S.001T.1100E.0000R11110 on March 15, 2016* -
## chemistry

a student was asked to prepare 100.0 mL of 0.0200 M solution of HCL from 0.400 M solution of HCL. in order to do this he measured 5.0 mL of 0.400 M HCL with a graduated cylinder, transfered this amount to a 100 mL beaker, added 95 mL of deionized water

*asked by morgan on November 12, 2013* -
## physics

2. A spring of spring constant 220 N/m is sitting on a table. You pick it up and stretch it so that it is 8.0 cm longer than it was on the table top. How much work did it take you to stretch the spring? (Hint: This work is just negative the work done by

*asked by Anonymous on October 28, 2014* -
## Chemistry

1)A solution prepared by adding 0.400 mol of acetic acid (pKa = 4.74) and 0.400 mol of sodium acetate to 100.0 mL of water. The pH of this buffer solution is initially 4.74. Predict the final pH when 55.0 mL of 1.10 M NaOH is added to solution 2) A

*asked by Maya on December 1, 2016* -
## Chemistry

i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there? Responses Chemistry - DrBob222, Monday, February 16, 2009 at 12:35am Just ignore the Cl^-. Co(H2O)6Cl3 ==>

*asked by Lindsey on February 16, 2009* -
## math, question

Is there anywher i can go for further explanations on how to solve for the following statements on how to solve them: Dividing writing each result in simplest form & adding & subtracting The second sentence makes no sense to me.

*asked by Jasmine on December 5, 2006* -
## Another algebra

Determine the number of positive integers n that satisfy: 1/2 < n/n+1 < 99/101 I don't know how to solve this besides plugging in random numbers, which would take all day. Any other suggestions for a faster way to solve it? Thank you!

*asked by Elle on January 20, 2009* -
## Social Studies (Ms. Sue)

What kinds of problems did progressives attempt to solve? My answer: They attempted to solve the issues of poverty, the spread of slums, and poor conditions in factories.

*asked by Anonymous on June 3, 2013* -
## statistics

Does anyone know how to solve these two problems. Solve the problem. Find the critical value za/2 that corresponds to a degree of condfidence of 98%. Express the confidence interval in the form of ^p _+E. 0.0330.493

*asked by sydney on August 28, 2007* -
## AP Chem

CH3CH2NH2(aq) + H2O(l) CH3CH2NH3+(aq) + OH-(aq) Kb = 5.0e-4 Ethylamine, CH3CH2NH, a weak base reacts with water according to the equation above. A 50.0 mL sample of a ethylamine solution is found to have a pH of the solution 11.60. (a) Write the expression

*asked by Jess on April 23, 2013* -
## Dynamics

A daredevil drives a motorcycle around a circular vertical wall 100 ft in diameter. The coefficient of friction between tires and the wall is 0.60. At what angle will the motorcycle be inclined to the horizontal? What is the effect of traveling at a

*asked by 16 on July 14, 2018* -
## Chemistry

State whether each of the following aqueous solutions would be acidic, basic, or neutral. Include appropriate net-ionic equations to show why a given solution is acidic or basic. a) NaNO3 b)KC6H5CO2 c)50:50 mixture of C6H5CO2H+KC6H5CO2 d)(CH3NH3)Cl e)50:50

*asked by Julie on March 13, 2010* -
## Math

A chemist wants to create a solution that is 24% acid. How many liters of 40% acid solution must be added to 50 liters of an 18% acid solution to obtain this 24% acid mixture? Please help thank you

*asked by Lauren on September 9, 2015* -
## math

a chemist wants to create a solution that is 36% acid. How many liters of a 60% acid solution must be added to 30 liters of a 15% acid solution to obtain this 36% acid mixture?

*asked by Alexa on September 9, 2015* -
## Math

A chemist wants to create a solution that is 24% acid. How many liters of a 40% acid solution must be added to 50 liters of an 18% acid solution to obtain this 24% acid mixture?

*asked by Zack on September 9, 2015* -
## Chemistry

A 15mL sodium hydroxide solution of unknown concentration is titrated with 34.5 mL of 1.2M HCl solution. What was the concentration of the sodium hydroxide solution?

*asked by Jo on April 23, 2012* -
## Chemistry

You are supposed to mix 250 mL of a 0.1 M solution of Pb(NO3)2 solution. You would need to mix ______ g of Pb(NO3)2 with enough water to make 250 mL of solution.

*asked by Kelly on February 12, 2017* -
## Organizational Behavior

Questions 1. Research conducted by Luthans supports the belief that promotions are base on performance. True or false 2. Tenure is negatively related to turnover. True or False. 3. Age and avoidable absences are negatively related. True or False. 4. Which

*asked by Edith on September 18, 2010* -
## Organizational Behavior

Questions 1. Research conducted by Luthans supports the belief that promotions are base on performance. True or false 2. Tenure is negatively related to turnover. True or False. 3. Age and avoidable absences are negatively related. True or False. 4. Which

*asked by Edith on September 19, 2010* -
## Physics

Could someone show me how to work this? It's for a study guide I'm practicing, and I just can't seem to get the correct answer. The position of a 0.63 kg object attached to a spring is described by [x = (1.09 m) cos(3.11πt)] a) Find the object’s

*asked by James on April 6, 2015* -
## 9th grade algrebra

Question 21 (Essay Worth 8 points) [2.08] The formula for degrees Celsius is: C = 9 over 5 (F − 32), where F stands for degrees Fahrenheit. Part 1: Solve the formula for F. Show all steps. Part 2: Determine how many degrees Fahrenheit 2 degrees Celsius

*asked by Anonymous on November 15, 2010* -
## Math:o

It takes a florist 3h 15min to make 3 small centerpieces and 3 large cebterpieces. It takes 6h 20min to make 4 small centerpieces abd 7 large centerpieces. How long does it take to make each small centerpiece and each large centerpiece? Write and solve a

*asked by LILY on February 24, 2013* -
## math

It takes a florist 3h 15min to make 3 small centerpieces and 3 large cebterpieces. It takes 6h 20min to make 4 small centerpieces abd 7 large centerpieces. How long does it take to make each small centerpiece and each large centerpiece? Write and solve a

*asked by Jim on May 24, 2013* -
## Math Check Please

1.y + 3 >_ 5 ???How do I solve this 2. Write an inequality to represent the information: The temperature stayed above 15°F I think it is: t < 15 but I am sooo not sure 3. Gabriella went skiing. She paid $35 to rent skis and $15 an hour to to ski, if she

*asked by Renee :) on April 25, 2018* -
## history

( ) around my answer. If nothing is there then i don't know What is one important achievement of the Incas? A. a written language B. a system of democratic government C. a system of roads and bridges D. an accurate calendar What is one way in which the

*asked by Someone on September 21, 2016* -
## Stats 2 help

1. The following sample data shows the use of plastic (debit and credit) cards versus cash/cheque by four age groups: Age Group 18-24, 25-34, 35-44, 45 and over Payment Method plastic 21, 27, 27, 36 cash or cheque 21, 36, 42, 90 Test for independence

*asked by Anonymous on February 6, 2018* -
## physics

An aluminum wire of radius 3.10 10-4 m is stretched between the ends of 2 concrete blocks. When the system (wire and concrete) is at 35°C, the tension in the wire is 57.0 N. What is the tension in the wire when the system is heated to 185°C?

*asked by Ben on November 28, 2010* -
## Algebra 1

9. Find the solutions to the system. y=x^2+5x+6 y=4x+12 A. (2,20) and (-3,0) B. (2,20) and (-3,-18) C. (-2,-20) and (-3,-18) D. no solutions 10. Find the solutions to the system. y=x^2-3x-1 y=8x-1 A. (0,-1) and (11,388) B. (0,-1) and (11,87) C. (-1,0) and

*asked by anon on April 23, 2018* -
## math

First set of data – wages: Food Prep/Cashier: $8.40/hr (25 employees) Assistant Manager: $9.25/hr (4 employees) Manager: $16.00/hr (2 employees) Owner: $45.00/hr (1 person) 1) Create a Frequency table (1 point) 2) Create an Histogram (1 point)(Label

*asked by Anthem on May 28, 2019* -
## CHEMISTRY

HOW YOU PREPARE 30.0ML OF 0.800M HNO3 FROM A STOCK SOLUTION OF 4.OOM HNO3? WHAT SOLUTION IN ML OF THE 4.OOM HNO3 SOLUTION WILL YOU NEED?

*asked by SARAH on April 10, 2011* -
## Uttarpara Govt.High School,physical science

There is a solution of 50 gm Pb(NO3)2 & 75 ml boiled water.If the solution is taken to the temperature at 20°c then what quantity of Pb(NO3)2 will come out from the solution if the solubility of Pb(NO3)2 in water at 20°c is 54.

*asked by Ayan Roy on November 27, 2015* -
## math

A pharmacist mixes 14 ounces of 68% saline solution with 55% saline solution. If the final mixture is 62% saline, how many ounces of the 55% solution were used?

*asked by Anonymous on January 31, 2013* -
## algebra

How many liters each of a 55% acid solution and a 80% acid solution must be used to produce 50 liters of a 60% acid solution? (Round to two decimal places if necessary.)

*asked by larry on October 17, 2016* -
## math

How many liters each of a 55% acid solution and a 80% acid solution must be used to produce 50 liters of a 60% acid solution? (Round to two decimal places if necessary.)

*asked by larry on October 17, 2016* -
## history

can some one check my work? i can where is it It's the one with the one that says order the sequence. Hi! brie. My work is on the 2nd page. Count the BLACK dots next to everybody's name until you find the 35th dot. Check that work. You'll see it next to my

*asked by Mack on April 27, 2007* -
## chem

How to determine maximum amplitude of oscillation of a system, using the question below? A large block P executes horizontal simple harmonic motion as it slides across a frictionless surface with a frequency f=1.50Hz. Block B rest on it and the coefficient

*asked by memey on March 31, 2011* -
## IT

Design a system which will take in the results for the five criterion levels of achievement for each phase of the design cycle: Investigate, Design, Plan, Create and evaluate. The system will then calculate the average and round up to the nearest decimal

*asked by chris on April 21, 2010* -
## math

Neisha is making punch. to make the punch. she needs 2 pints of lemonade. she only has 1-cup measure. how many cups of lemonade should Neisha use? A 2 cups B 3 cups c 4 cups D 5 cups ( please show work )

*asked by marquis on February 28, 2008* -
## math

I need help solving these equations -5s+3s-2s=48 6m=5m-2+m 5d=-2d-24 you need help or you want someone to solve them for you? ;) please solve : ) thanks okay well pretty much solve for s in the first question and m for the second question and d in the

*asked by courtney on October 30, 2006* -
## chemistry

A mixture containing 15 g of carbon and 25 g of oxygen is sealed in a flask. The total mass of the system is 140 g. The flask is then heated to cause the carbon and oxygen to react. The sealed flask is then weighed. What is the final weight of the system?

*asked by Johnn on October 15, 2014*

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