# What happened if you put the Elodea leaf cells in a solution of 0.5% NaCl,1.8% NaCl and 0.9%NaCl?

36,754 questions, page 188-
## HHS

What is the molality of a solution in which 15g of I2 is dissolved in 500g of alcohol?

*asked by jaz on April 4, 2011* -
## Chemistry

If you have 200 mL of a 0.50 M solution of KOH and you wish to dilute it to 0.30 M, how many mL of water should you add?

*asked by asdffffff on April 6, 2011* -
## Algebra help pls

3+6z=13+6z A Z= -5/6 B Z= 2 2/3 c Has infinite solutions D Has no solution How can i solve this idk how to start

*asked by Blaw on September 19, 2017* -
## Science

Calculate the molality of 48.2 percent by mass KBr solution?

*asked by Donna on April 2, 2019* -
## science

A 25 ml solution of 0.5 M NaOH is titrated until neutralized into a 50 ml sample of HCl

*asked by Ayomide on June 27, 2018* -
## Chemistry

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

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

What is the purpose of adding distilled water to an HCl solution?

*asked by Lei on October 6, 2013* -
## chemistry

What is the number of moles of NaOH in 1.91 mL of a 872.25 molar solution?

*asked by chels on October 19, 2011* -
## calculus

find the general solution to the differential equation. dy/dx=secxtanx-e^x

*asked by Anonymous on February 25, 2011* -
## chemistry

Calculate the pH of a solution prepared by mixing 25.0 mL of 0.60 M HC2H3O2 and 15.0 mL of 0.60 M NaC2H3O2?

*asked by Julie on May 6, 2010* -
## chemistry

Calculate the grams of Ca(OH)2 used to make 500 mL of a 0.150 M solution.

*asked by gab on April 30, 2018* -
## history

Evaluate the effectiveness of nixon's solution. was it successful? how do you determine this?

*asked by aria on May 12, 2016* -
## Chemistry

A 0.10M solution of a certain monoprotic weak acid has a pH of 2.44. Calculate Ka.

*asked by Jackson on March 1, 2016* -
## general chemistry

Calculate the molarity of each of the following solutions.70.8g C2H60 in 2.51L of solution

*asked by kelia on March 7, 2013* -
## Chemistry

Determine the percent ionization of a 2.45 M solution of benzoic acid

*asked by Gabby on February 27, 2015* -
## Some basic concept of chemistry

0.5M aluminum sulphate aques solution normality calculation

*asked by Chhaya on January 25, 2017* -
## Algebra

Use set builder notation to describe the complete solution. 5[3m-(m+4)]>-2(m-4)

*asked by Sadie on May 5, 2009* -
## chemistry

The solubility of AB(s) in a 1.000-M solution of C(aq) is found to be 0.121 M. What is the Ksp of AB?

*asked by help please on May 7, 2014* -
## chem 150

calculate the molarity of 700grams of NaOH in 2 liters of solution

*asked by nick on June 22, 2011* -
## Math

write three fractions that can be written as percents between 50% and 75%. Justify your solution.

*asked by Jen on November 13, 2014* -
## chemistry

Determine the molarity of a 2.15-L aqueous solution containing 1.45 moles of KCl.

*asked by Anonymous on November 15, 2011* -
## algebra

what is the solution of the following linear system? 5x - 2y = 15 5/3x - y = 5 a)(-2,1) b) none c)(3,0) d) inifinite number if solutions

*asked by candy on April 29, 2010* -
## chemistry

What is the pH of the solution created by combining 2.20 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)?

*asked by bme1 on April 17, 2010* -
## 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* -
## Physic

Show that the function y(x,t) = X^2 + V^2t^2 is a solution of the general wave equation.

*asked by Godwin on January 4, 2016* -
## Algebra 2

solve the inequality. Graph the solution set. 5r + 4 is less than or equal to 5

*asked by bubblegum on September 3, 2015* -
## 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* -
## Science

In an acidic solution, why is the OH- concentration lower than it is in pure water?

*asked by Sheryl on October 22, 2011* -
## CHEMISTRY

What concentration of aqueous CaCl2 solution freezes at -10.2ºC?

*asked by Anonymous on November 23, 2010* -
## Chemistry

Calculate the pH of a solution that is 0.185M in HC2H3O2 and 0.125M in KC2H3O2

*asked by Gabby on March 6, 2015* -
## Chemistry

A solution is 25% by mass calcium nitrate and has a density of 1.21 g/mL what is the molarity?

*asked by Adrian on May 12, 2016* -
## 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* -
## org chm

how many grams of KOH are needed to make 590 ml of a solution with a pH of 11.35?

*asked by carol on November 17, 2010* -
## Differential Equation

Find the general solution of (D^2-3D+2)(D-5)^Dy=0. (Hint:Use the auxiliary equation)

*asked by Maegan on July 14, 2012* -
## chemistry

If you have 200. mL of a 0.50 M solution of KOH and you wish to dilute it to 0.30 M, how many mL of water should you add?

*asked by Anonymous on April 7, 2011* -
## chemistry

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

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

Show that the function y(x,t) = X^2+V^2t^2 is a solution of the general wave equation.

*asked by Godwin on January 4, 2016* -
## chemistry

what is the pH of a solution that has 12.2 grams of hydrochloric acid in 500 ml of water

*asked by kandace on March 5, 2013* -
## Math

Determine the quadratic equation whose solutions are: 3 and -2 Solution(with workings):

*asked by Ghiffari on October 23, 2011* -
## Algebra

I have answered the question but not sure how to check for extraneous solution. x/(5x+4)=3 The answer is -6/7

*asked by Eric on February 8, 2017* -
## Science

The formula wt of h2so4 is98bthe wt of the acid in 400ml of 0.1M solution is

*asked by Anonymous on September 5, 2017* -
## Math

If x = xo and x = x1 are both vector solution of Ax=b, then x1 - xo is in the Null Space of A. True or False?

*asked by Anonymous on September 7, 2012* -
## Chemistry

A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

*asked by Anonymous on April 27, 2014* -
## Science

Calculate the pH of an aqueous solution containing 1.3 * 10^-2 M HCl, 3.0 * 10^-2 M H2SO4, and 2.0 * 10^-2 M HCN.

*asked by Will Coppock on July 24, 2012* -
## AP Chemistry

What is the molarity of 827 mL of a solution that contains 0.057 mol of solute?

*asked by Chelsea on September 17, 2012* -
## Algebra

Solve the equation 5x+7=13-7x graphically. then check your solution algebraically.

*asked by Adri on November 2, 2011* -
## Chemistry

Calculate the volume of 0.3MHCL used to neutralise NaOH solution

*asked by Chris on March 25, 2013* -
## Chemistry

in any aqueous solution what effect does the addition of NaOH (aq) have on the concentration of H+ (aq)

*asked by Lisa on June 6, 2012* -
## Mendulo

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

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

What mass of CH3COONa must be added to 50.0 mL of 0.50 M CH3COOH to make a solution of pH 6.0 ?

*asked by nurul on March 9, 2015* -
## calculus

solution for limit as delta x approaches 0 (1-cos4x/1-cos2x)

*asked by Anonymous on June 28, 2012* -
## 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* -
## chemistry

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

*asked by Anonymous on August 20, 2016* -
## Biology- PLEASE HELP ME ):

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

*asked by Kasey on March 1, 2011* -
## Maths

Solve the equation(GS general solution) 5sin^2x-3sinx-2=0

*asked by Ndaba on August 23, 2017* -
## 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

0.30M nh3 and 0.20M HCL calculate the ph of solution kb=1.8 × 10^-5

*asked by kanks on March 2, 2013* -
## 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* -
## chemisty

how we prepare 0.5 mol of solution of hcl in 70ml in water

*asked by asif on November 15, 2015* -
## Chemistry

What is the molality of the solution that results when 33.3g of C2H5OH are added to 76.7g of water?

*asked by Anonymous on May 2, 2014* -
## chemistry

Calculate the pH of an aqueous solution containing 1.6 x 10-2 M HCl, 2.0 x 10-2 M H2SO4, and 1.8 x 10-2 M HCN.

*asked by alyssa on November 19, 2011* -
## chemistry

what is the concentration of a 250 ml solution that contains 44 grams of magnesium fluoride

*asked by Emily on August 21, 2013* -
## Chemistry

What is the molarity of a solution containing 40 grams of NaOH in 100 ml of soution

*asked by corinna on July 13, 2011* -
## Chemistry

3.50 g of NH4Cl is added to 18.8 g of water. Calculate the molality of the solution.

*asked by Shardai on October 16, 2013* -
## algebra

can you please show me how to do this? Determine whether the ordered pair is a solution of the inequality. y>x^2- 5x (2,-3)

*asked by Tyriq on August 25, 2010* -
## Algerbra I

Help! I don't get this. solve each inequality. Graph the solution set, if there is one. 1. n-4>11 2. 4q7 4. a+3s/3 8. x/2-4>-6

*asked by Jared on February 4, 2008* -
## math

How do I draw a diagram to show how to find the solution to 2.6 divided by 0.4

*asked by Buggy boo on September 10, 2013* -
## chemistry

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

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

Find solution to equation X^2+x+ãx^2+x-2 =0 Note; square root is x^2+x-2

*asked by Jessica on July 21, 2009* -
## please help analytical chemistry

what is the activity coefficient of SO4^2- when the ionic strength of a solution is .1?

*asked by holly on March 9, 2013* -
## Inorganic chemistry

What change in coulombs, is required to deposit 0.301 g Cu(s) from a solution of Cu^2+(aq)

*asked by Steve on April 11, 2009* -
## Science

Determine the pH of a .10M solution of KA, the potassium salt of HA. For HA, Ka=1.0x10^-5

*asked by Stephanie on August 8, 2012* -
## Chemistry

what is the pH of a solution created by adding 15.5 g of KClO to 228 mL of 1.08 M HClO(aq).?

*asked by Carl on March 12, 2015* -
## chemistry

What is the final volume in milliliters when 0.698 of a 42.2 (m/v) solution is diluted to 21.1 (m/v)?

*asked by Anonymous on July 22, 2012* -
## 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

Determine the molar solubility (S) of Zn(CN)2 in a solution with a pH = 4.91. Ksp (Zn(CN)2) = 3.0 × 10-16; Ka (HCN) = 6.2 × 10-10.

*asked by Jackie on March 21, 2013* -
## Algebra

I have to identify the system of equations, if any for: -2x-4=1, 12=-6x-3 no solution? infinitely many solutions? (0,-1)? or (-1,0)?

*asked by Sandra on May 4, 2014* -
## science

Calculate the pH of the solution 5ml of M/5,HCl+10ml of M/10 NaO

*asked by KANNAN on August 12, 2016* -
## 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* -
## chemistry

a 100ml solution of 0.01M sodium chloride has how many ppm (mg/L) please?

*asked by lynda on June 2, 2012* -
## Algebra

How do you solve the following problem? 3(4+4x)= 12x+2 It has no solution. X can be any value, and it wont equal.

*asked by James on April 10, 2007* -
## chemistry

How would you make 250 ml of a .51M calcium hydroxide solution?

*asked by Sarah on March 30, 2011* -
## Chemistry

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

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

A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

*asked by Anonymous on April 27, 2014* -
## Chemistry

How many moles of methanol are dissolved in 1.5 L of water to make a 2.0 m solution?

*asked by Bigfoot on May 18, 2012* -
## Chemistry

What volume of .225 M aluminum chloride solution contains 5.0 g solute?

*asked by Susan on March 12, 2015* -
## chemistry

Suggest a technique the student could try to reduce the concentration of the 12 M solution.

*asked by sam on April 3, 2011* -
## Algebra help pls

Which ordered pair is a solution of the equation y=4x? A (1,3) B (-1,-4) C (-4,-1) D(1,-4) Can Someone help me solve this pls ?

*asked by Blaw on September 19, 2017* -
## Chemistry

How many grams of KOH must be dissolved in one litre of solution to give it a pH value of 12?

*asked by Sahil on June 29, 2011* -
## math

write an integer for each solution a salary increase of $250

*asked by Alex on September 9, 2013* -
## Mathematics

Determine the quadratic equation whose solutions are: 3 and -2. Explain your solution

*asked by Jessica on October 21, 2011* -
## Chemistry

Calculate the molar solubility of Cr(OH)3 in a solution with a PH of 11.6 knowing that the Ksp(Cr(OH)3)=6.7×10^-31.

*asked by Last on March 25, 2019* -
## 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* -
## math

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

*asked by sabrina on April 19, 2014* -
## Math Help Me Please

4 Determine which ordered pair is not a solution of y= -5x – 4 A (10, -52) B (7, -39) C (-7, 31) D (8, -44) I don't know how to solve it?

*asked by SmartyPants on March 17, 2015* -
## algebra

needing help with is problem solve for x: 3x-2y=-6 here is my solution 3x - 2y = -6 3x = 2y - 6 x= 2y -6/3 x=2/3y-2 yep that's correct.

*asked by jessica on April 10, 2007* -
## MATH

A 0.26 M solution of a weak acid HA is 0.35 % ionized. What are the H+ , A- , and HA concentrations at equilibrium? What is Ka?

*asked by Ash on January 28, 2017* -
## Social studies

who advocated for the solution of medicine and health in the progressive era?

*asked by Anonymous on September 25, 2017* -
## Math help!

What is the value of y in the solution set of the system of linear equations shown below? y=-x+12 4x-2y=36 A. 10 B. 8 C. 6 D. 2*** I think its D but Im not sure, help?

*asked by Answers on February 5, 2019* -
## Chemistry HELP URGENT PLEASE!!!

what current (in amperes) is required to plate out 2.85 g of Cr from a Cr^3+ solution in a period of 2.50 hr?

*asked by Maho on March 17, 2014*

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