# Please observe the solution for the following two problems : (a) 2x + 18 = x + 25 (b) 3x + 5 = 7x - 15 (a) 2x + 18 = x + 25 2x - x = 25 -

30,299 questions, page 146-
## chemistry

what is the iobic equation of zinc +iron(ll)sulphate solution

*asked by demiz on March 17, 2015* -
## chemistry

What is the pH of the solution created by combining 2.80 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HC2H3O2(aq)? I got 1.3. is that correct?

*asked by ibob on April 29, 2009* -
## Chemistry

What is the pH when 3.46 mL of 2.37 M KOH is added to 26.9 mL of a 1.78 M solution of formic acid (HCOOH)?

*asked by sarah on February 24, 2011* -
## chem

How many chloride ions are present in 65.5 mL of 0.210 M AlCl3 solution

*asked by Anonymous on February 11, 2015* -
## Chemistry

What effect does diluting the sodium hydroxide have on the basicity of the solution?

*asked by Dick Rogers on December 15, 2007* -
## Chemistry

A solution has 140 grams of KOH dissovled in 5 L of water. What is the pH ?

*asked by Emma on February 26, 2014* -
## Chemistry

What mass of KBr is required to prepare 8.oo L of .400 M solution?

*asked by Nicole on September 10, 2012* -
## chemistry

why should you be care when you heat your NacL solution to evaporate the water?

*asked by Anonymous on June 1, 2010* -
## algebra

Solve the compound inequality graph solution 6x-410

*asked by Tammy on February 25, 2014* -
## Math

How would I find the solution set for a system of linear inequalities? For example, x-3y

*asked by HEL on July 27, 2014* -
## Algebra

I posted this before but could not understand the answer. How do I write the solution set of: {x| } for (x+20)(x -10)(x+11)>0

*asked by Daniel on May 30, 2010* -
## math

which of the ff. coordinates of points belong to the solution set of the inequality y

*asked by =) on July 27, 2014* -
## Biology- PLEASE HELP ME ):

how does the salinity of a solution affect osmosis in an onion cell?

*asked by Kasey on March 1, 2011* -
## AP CHEM

A solution formed by mixing 13.0 mL of 0.013 M Ba(OH)2 with 31.0 mL of 7.0 ✕ 10-3 M NaOH. Calculate [OH-]

*asked by Jordyn on February 17, 2015* -
## Science

How do you prepare 500mL of a 2.5M solution of NaOH from the solid compound?

*asked by Cassie on December 9, 2012* -
## chemistry

What is the concentration of a solution containing 25g of NaCl in a 250mL sample?"

*asked by Samantha on June 6, 2011* -
## algebra

what is the solution of the following system of equations? 2y - x = 8 y = 2x + 1 a) (1,2) b) (5,2) c) (2,1) d) (2,5) and the answer i picked is c thank you, poo :)

*asked by poo on April 29, 2010* -
## math

Solve the inequality = 3- 2x ˂ x ¡Ü 2x + 5 and show the solution on the number line

*asked by kudu on February 15, 2015* -
## Chemistry

What is the molarity of a solution of H3PO4 if 11.1 mL is neutralized by 33.2 mL of 0.161 M NaOH?

*asked by taytay on April 20, 2014* -
## math

use set-builder notation to describe the complete solution 5[3m-(m+6)]>-6(m-5)

*asked by jay jay on July 14, 2008* -
## AP Chem

Determine the [H3O^+] of a 0.240 M solution of formic acid.

*asked by Eddie on March 21, 2010* -
## chemistry

how many grams of potassium carbonate are in 75.0ml of a 2.44M solution?

*asked by elmi on May 3, 2015* -
## algebra

solve x-4

*asked by babygirl on September 7, 2011* -
## chemistry

Calculate the molality of CsCl in a 19% by mass aqueous solution.

*asked by cheri on September 13, 2012* -
## precalculus

(y+1)(y+3)(5y-2)=0 That is an equation. What is the question? Are you supposed to multiply it out or say what the solution values of y are?

*asked by Roxanne on March 7, 2007* -
## chemistry

describe how you can crystallize potassium nitrate from its aqueous solution

*asked by ziki on April 30, 2011* -
## chemistry

how many ml of 0.15 NaOH solution are required to neutralize 35.00 ml of 0.22 moles of HCL

*asked by mc on April 14, 2010* -
## science

Calculate the concentration of all species in a 0.145M solution of H2CO3

*asked by Kris on March 18, 2015* -
## chemistry

What would be pH of a 0.01 M solution of a very expensive weak base, unobtainamine, whose pKb is 3.8? 1. 2.9 2. 14 3. 2 4. 7 5. 11.1

*asked by Anonymous on February 7, 2015* -
## calculus

verify that y=C1e^2x + C2e^-3 is a solution of the differential equation y''+y'-6y=0

*asked by mari on April 10, 2012* -
## science

determine the molarity of the following solution 31 g MgF2 in 55ml H20

*asked by willie on January 8, 2013* -
## science

determine the molarity of the following solution 31 g MgF2 in 55ml H20

*asked by willie on January 8, 2013* -
## math

Find values of x and y, if any, that will make the matrices equal. [ x y ] = [ 3 5 ] 1 9 1 9 a. x=-3,y=-5 b. x=5,y=3 c. x=-3,y=5 d. x=3,y=5 e. no solution

*asked by laura on August 26, 2016* -
## Chemistry

How much of NaOH (in grams) is needed to prepare 546 mL of solution with a pH of 10.00 ?

*asked by Sara on February 16, 2011* -
## Chemistry

How much water would I need to add in order to dilute 200mL of a 5 M solution down to 2 M?

*asked by Emma on February 21, 2014* -
## Chemistry

How much of NaOH (in grams) is needed to prepare 546 mL of solution with a pH of 10.00 ?

*asked by Sara on February 15, 2011* -
## Mendulo

what mass of H2SO4 is contained in 25g of 15percent w/w solution?

*asked by Titus on August 21, 2016* -
## chemistry

what is the concentration of na and co3 ions in 0.2M aqueous solution of na2co3

*asked by Anonymous on August 20, 2016* -
## Chemistry(Please help)

What is the pH of 0.144M aqueous solution of ammonium nitrate? I am not sure what to do. Would I do 10^-0.144^ = 0.71?

*asked by Hannah on April 7, 2012* -
## AP Chemistry

Which is a stronger base in aqueous solution, IO- or IO3-? Explain.

*asked by Lisa on April 26, 2010* -
## Chem

Calculate the molarity of 2.7 moles NaOH, 1.75l solution

*asked by Floyd on November 29, 2017* -
## math

what is the 7th term of the geometric sequence 10,2.2/5,2/25 (show your solution)

*asked by eljone on August 16, 2016* -
## biology lab

how many grams of mercury II Nitrate will you need to prepare 500mL of a .60 M solution ?

*asked by nicole on February 24, 2017* -
## Chemistry

Calculate the pH of a 0.250M solution of Sulfurous acid, H2SO3.

*asked by Josh on February 18, 2011* -
## chemistry

Calculate the number of mL you would use to prepare 5.0 L of 0.20 M NaOH from a 5.23 M stock solution.

*asked by laney on April 26, 2010* -
## chemistry

Calculate the pH of a solution (to 2 decimal places) which is 0.106 M in phenol, Ka = 1.0 x 10-10.

*asked by caleb on January 10, 2008* -
## college

to how much water should 50.0 ml of 12.0 M HCl acid to be added to produce a 4.00 M solution?

*asked by vik on March 18, 2010* -
## math

please this is the last problem i have to do and i just can't get it thanks for anyhelp Which of the ordered pairs is a solution for the equation 2x – 5y = 10? (0, 2) (–5, 0) (–5, –2) (0, –2)

*asked by amy on January 10, 2008* -
## algebra

Solve the compound inequality graph solution-2

*asked by jim on February 24, 2014* -
## chem

What is the pH in a solution that has a concentration of 4.5x^-3 M HCl rounded to the nearest hundredth?

*asked by Tyler Clark on April 12, 2012* -
## Pre-Cal.

Solve the following inequality . Write your solution in interval notations. x+3/x-3

*asked by phyllys on December 28, 2012* -
## Maths

How can it be possible for a set of inhomogeneous simultaneous equations to have no unique solution?

*asked by Alice on April 28, 2009* -
## Chemistry

how do you make 50ml of .1 molar solution of benzylamine in acetonitrile

*asked by Dina on February 9, 2015* -
## Chemistry

How many g of KCL would have to be dissolved in 60g H2O to give 25% by wt. of solution?

*asked by Devanshu on June 3, 2010* -
## Chemistry

What is the density of a solution of 9.0% Calcium chloride dissolved in water?

*asked by Cassie on September 9, 2012* -
## Chemistry

What happens when an electric current is passed through a solution of an ionic compound?

*asked by Aybrianna on November 13, 2017* -
## math

Which is the value is in the solution set for the inequality -8-7x>6 A=-1 b=-2 c=-3 d=2 -8-7x>6 add 8 to each side -7x>14 -7/-7>14/-7 x

*asked by b6 on January 3, 2013* -
## algebra

Which of the graphs below represent the graphical solution to the following system of equations? 4x + y = 5 3x – 7y = 27

*asked by Anonymous on September 18, 2011* -
## College chemistry

How do you calculate the number of mL you would use to prepare 5.0 L of 0.20 M NaOH from a 5.23 M stock solution.

*asked by laney on April 26, 2010* -
## Chemistry

Calculate the concentration of aqueous solution of barium hydroxide whose pH is 12

*asked by Momito on April 7, 2012* -
## Saint Louis University

Let f(x,y)=sqrt((x-a)^2+(y-b)^2+(z-c)^2). Minimize f subject to Ax+By+Cz+D=0. what is the geometric meaning of your solution?

*asked by Micx on March 2, 2011* -
## Chemisty

how many mole of calcium sulfate are in a 100mL of .86M solution?

*asked by Riley on November 26, 2012* -
## Algebra

Solve |6x – 7| < = 25 and write interval notation for the solution set.

*asked by Alyssa on July 7, 2009* -
## Algebra

Write the solution in interval notation x=-2. ) What would the compound inequality look like? Thanks for the help!

*asked by Ann on June 9, 2011* -
## Algebra 2

Find the solution of the exponential form in terms of logarithms 2^(2x+13) = 3^(x-45)

*asked by Andrew on April 30, 2010* -
## organic bio chemistry

how many mL of a 0.20M KOH solution is needed to neutralize 25 mL of 0.25 M H2SO4?

*asked by lisa on March 8, 2011* -
## chemistry

calculate the normality of 4g of sodium hydroxide in 100ml of solution

*asked by arul raj on October 13, 2016* -
## mathematics

if [x] denotes the integral part of x, then what is the solution set of the equation [x]^2 -5[x]+6=0

*asked by edward on September 22, 2012* -
## 10th grade Chemistry

To what volume should 5.o g of kcl be diluted in order to prepare a o.25 m solution

*asked by Angelica Martinez on April 26, 2011* -
## Chem

Specify the concentration of each ion in solution for the following: .10 M AlCl3 (aq) and .15 M (NH4)2SO4 (aq)

*asked by Sarah on February 13, 2017* -
## Mathematics

use rolle's theorem to show that the equation 7x^6-9x^2+2=0 has at least one solution in the interval (0,1)

*asked by Anonymous on February 22, 2015* -
## Algebra!

Which ordered pair is a solution to the system y(line under)-x-1? A. (0,-2) B. (1,2) C. (-5,0) D. (0,-5) I'm thinking it's B.. but i need some help with this.

*asked by Allyson on June 9, 2011* -
## math

if f(x= 5x - 1 find f(a-2) Please show me the work so I can understand how to arrive at the solution. Thank you. f(a-2)=5(a-2)-1

*asked by Diana on June 1, 2007* -
## chemistry

how many moles of Cl- ion in the solution containing 0.187g Cl- dissolved in 50.0 ml water.

*asked by mel on October 23, 2007* -
## Math

Write the solution of the inequality in set-builder notation: 5r+8

*asked by EmberShy on February 15, 2017* -
## Algebra

Is the point (-3,-2) a solution of the intersection of the following set of quadratic equations: Y < -X ^ 2X^2 + Y^2< 16

*asked by Christina on April 26, 2011* -
## Chemistry

What is the possible ionic equation of TrisEDTA solution? REDOX reaction.

*asked by Maryam on April 25, 2012* -
## Math

Determine the number of factors of 5^x + 2•5^x+1. Choices: A) x B) x + 1 C) 2x D) 2x + 2 Please show solution:)

*asked by K on October 3, 2017* -
## Math

Determine the number of factors of 5^x + 2•5^x+1. Choices: A) x B) x + 1 C) 2x D) 2x + 2 Please show solution:)

*asked by K on October 3, 2017* -
## math

What is the solution of the system of equations? y=5/6x+1 −x+y=2 Enter your answer in the boxes.

*asked by Jay on February 11, 2017* -
## chemistry

If 27.3 g of NaNO3 are needed, what volume of a 5.78 % w/v solution will provide this mass?

*asked by lisa on April 26, 2012* -
## chem(litmus)

Is it wrong to put litmus paper directly in solution?

*asked by mary on September 30, 2009* -
## calculus

Which of the following is NOT a solution to cos^2 x = 3sin^2 x? 30 60 150 210 330

*asked by philly on November 27, 2012* -
## Chemistry

Calculate the concentrations of H3O+ and OH- ions in a 0.25 M HClO4 solution.

*asked by John on March 10, 2011* -
## math

The graphs of f(x)=−5/3x+9 and g(x)=2^x−1 intersect at (3, 4) . What is the solution of −5/3x+9=2^x−1 ? Enter your answer in the box.

*asked by Jay on February 11, 2017* -
## chemistry

The poH of a solution of 0.25mol/dm3 of Hcl acid is

*asked by peter onoriode on March 10, 2011* -
## Science

Determine the molar concentration of Ca^2+ and Cl- in a .075 M CaCl2 solution

*asked by Moses on March 9, 2011* -
## science

determine the molar concentration of Ca^2+ and Cl- in a .075 M CaCl2 solution

*asked by abby on March 9, 2011* -
## math

(19) Does the following system of equations have a solution? If it does, find one; if not, explain why not. √ x + √ y = 1 r 4x 9 − r 25y 64 = 1

*asked by sukh on February 12, 2017* -
## chem

How would you prepare 100 mL of a 0.01N sulfuric acid solution?

*asked by Anonymous on March 7, 2014* -
## chemistry help

What mass of Kbr is present in 25 mL of a 0.85 M solution of potassium chloride?

*asked by tom on May 10, 2009* -
## analytical chemisty

Calculate the pH and pOH of a 0.00002M solution of acetic acid.

*asked by mary on September 23, 2012* -
## chemistry

What is the final volume V2 in milliliters when 0.600 L of a 40.9 % (m/v) solution is diluted to 20.1 % (m/v)?

*asked by Anonymous on April 25, 2012* -
## chemistry

How many moles of glucose would be present in: 1Litre of a 5micromolar solution?

*asked by Christina on December 3, 2012* -
## Chemistry

which must be a mixture of substances? 1. solid 2. liquid 3. gas 4. solution

*asked by John on November 6, 2007* -
## chemistry

If you dissolve 5.0g of NaCl in 3.0 liters of water, what is the concentration of the solution?

*asked by Juliettte on March 5, 2011* -
## chemistry

20 g of sugar are dissolved in 1 L of water. Calculate the concentration of this solution.

*asked by Sarah on August 28, 2011* -
## trig

Complete the general solution to y = arcsin -. y=____±2k IM lost please help

*asked by tracy on March 24, 2010* -
## chemistry

Could you produce a cell that contains a 1.0M solution of Fe2+ and Fe3+ ions?

*asked by Wina on March 5, 2011* -
## math

-4x-4y=12 16y=-16x-48 identify the solution of the system or equatuions

*asked by sabrina on April 19, 2014*

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