# 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 245
1. ## Chemistry

Suppose that you used 0.75g of iron. What is the minimum volume of 1.5 M_ CuSO4 solution required Using eqn. (3-1)? and eqn. (3-2)?

asked by Liza on September 12, 2015
2. ## math

show solution. in a certain eatery, there are 5 glass racks having 24 glasses and 8 left over. The answer says there are 130 glasses in all.

asked by shawn on July 13, 2016
3. ## science

what type of solution is formed when steam from boiling water evaporates into the air?Explain.please explain

asked by Anonymous on October 15, 2009
4. ## Chemistry

A solution containing equal masses of glycerol, C3H8O3, and water has a density of 1.10 g/mL. Calculate the molality of glycerol. I got 11.9 m.

asked by Student on February 14, 2016
5. ## algebra

Check whether the ordered pair is a solution to the equation x =3/4; (1/2, 3/4). Please show me step by step how you came up with this answer because I am really confused.

asked by Joy Chapman on October 27, 2009
6. ## Biology

Identify/ name at least 1 biological science problem and prepare a procedure on how to solve such problem then recommend solution.

asked by Gela on January 7, 2014
7. ## Chemistry

For a 0.47 M solution of LiClO compute the pH. Hi. I am confused about this question. I calculated the pH...but my answer is wrong. what am I doing wrong??? pH=-log(0.47) pH=0.33

asked by J on November 13, 2016
8. ## chemistry

A 0.26 M solution of a diprotic acid, itaconic acid, has an [H+] of 6.0 10-3 M. What is the value of K1? I got answer like 2.6 10-1 ,I am not realy sure if u help me C5H6O4--> C5H5O4 + H+ K1 is constant

asked by kelly on May 15, 2010
9. ## chem

a hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula. solution.................................................... CH=12+1 n=13 13n=39 =3

asked by teegold on May 21, 2014
10. ## Chemistry

A solution of 22.0g of nonionic ascorbic acid in 100.0g of water freezes at – 2.33°C. What is the formula weight of the acid?

asked by Jaques on May 8, 2014
11. ## math

what is the solution sets of the following a) 2x^-7x-5 b)5y^-16y+3 c)10x^+5y-6 d)10x^-13x+4 e)12y^-11y-5 f)10c^-21c+9 g)3m^+5m-2

asked by Mohamed shiko on January 17, 2011
12. ## chemistry

Find the mass of urea needed to prepare 50.1 of a solution in water in which the mole fraction of urea is 7.50×10−2.

asked by Kelley on January 28, 2012
13. ## chemistry

Describe how you would make 500.0mL of a 0.200M NaOH solution from a 15.0 stock NaOH conentration

asked by Monique on November 6, 2011
14. ## chemistry

If 35.8 grams of LiCl are dissolved in 184 grams of water, what is the concentration of the solution in percent by mass?

asked by smith on November 29, 2010
15. ## science

the hydrogen ion concentration in a mixture of 10ml 0.1 M H2SO4 AND 10ml 0.1M KOH solution in water is?

16. ## chemistry

how do you find the moles of solute and the molarity if the molar mas is 98.07, mass of solute is 62.0, and the volume of solution is 1.00?

asked by denise on June 13, 2010
17. ## Calculus

If g(X) = 2+ln(x-5), find the inverse function, (g^(-1))(x) Solution: y = 2+ ln(x-5) e^y = 2 + x - 5 x = e^y + 3 y = e^x + 3 g^(-1) = y = e^x + 3 Is that right? I'm following an example - but don't really get it - how do I determine the domain and range -

asked by Linda on September 3, 2016
18. ## chemistry

what volume of a 0.272 M solution of HBr is needed for a reaction that requires 49.5 g of HBr? Answer in units of L.

asked by Anonymous on September 12, 2011
19. ## chemistry

indicate the concentration of each ion presentin the solution formed by mixing 20mL of .1M HCL and 10mL of .22 M HCL

asked by fdg on December 6, 2011
20. ## chemistry

Find the mass of urea needed to prepare 51.7 of a solution in water in which the mole fraction of urea is 7.80×10−2.

asked by amy on January 29, 2012
21. ## Algebra 2

An object is moving at a speed of 3 + 2 𝑓𝑡/𝑠. How long would it take the object to travel 20 𝑓𝑡? [looking for actual solution and not decimal approximation]

asked by Bill on May 1, 2015
22. ## Chemistry

If a saturated solution prepared by dissolving solid BaSO4 in water has [Ba2+]= 1.04*10^5M, what is the value of Ksp for BaSO4?

asked by Melissa on February 8, 2011
23. ## chemistry

use dimensional analysis to find how many moles of nitrate ions are in 40.0 mL of a 0.75 M aqueous solution of aluminum nitrate

asked by M on August 22, 2011
24. ## Chem

What volume ( L ) of the solute ethanol should be mixed with 0.546 L of the solvent C4H8O to make a solution that is 8.44 m ethanol.

asked by andy on February 12, 2010
25. ## chemistry

What is the molarity of H3O+ in a 5.33×10^-4 M NH2NH3Cl solution that hydrolyzes according to the equation. NH2NH3^+(aq) + H2O(l) = H3O^+(aq) + NH2NH2(aq)

asked by Diem on May 5, 2010
26. ## Chemistry

Calculate the molar concentration of H+ ion of a solution that is 3.45×10-1 M in CH3CO2H and 1.62×10-3 M in the salt CH3CO2Li. CH3CO2H(aq) = CH3CO2-(aq) + H+(aq)

asked by Jeby on May 5, 2010
27. ## Math

Solve the equation. (Enter solutions from smallest to largest. If there is no solution, enter NONE in the answer boxes.) 4x^2 = 7x + 2

asked by darren on October 22, 2011
28. ## Chemistry

A current of 5.41 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 7.30 g of nickel?

asked by At Least I Am Persistent. on April 2, 2014
29. ## Chemistry

Calculate the pH of the solution formed by adding 15.0ml of 0.1M sodium hydroxide to 30.0ml of 0.1M propanoic acid.

asked by Fritz on January 19, 2014
30. ## chemistry

2 litre of NH3 at 30°C and at 0.20 atmosphere is neutralized by 134 mL of a solution of H2SO4. Calculate normality of H2SO4

asked by jaimi on April 16, 2015
31. ## Micoud secondary

determine the number of electrons required to deposit 6.4g of copper from an aqueous solution of copper II sulphate

asked by kaye on March 17, 2010
32. ## Chemistry Help

If 230.0 mL of 0.100 M H2SO4 are mixed with 280.0 mL of 0.300 M H2SO4, what is the molarity of the final solution? in M

asked by MBH on October 3, 2011
33. ## Chemistry

For the reaction: Pb(NO3)2(aq) + 2KCl(aq)->PbCl2(s) + 2KNO3(aq) How many grams of PbCl2 will be formed from 63.0 mL of a 1.60 M KCl solution?

asked by Terri on June 22, 2016
34. ## Chemistry

When 50.0 g of iron(3)nitrate, FE(NO3)3, is dissolved in water , the number of nitrate ions present in the solution is

asked by Patrick on December 6, 2010
35. ## algebra

Solve the inequality, -3x - 2 < 5. Write the solution as an inequality with no spaces. You may leave the fraction in improper form.

asked by Joshua on January 23, 2011
36. ## Chemistry

"Calculate the pH of 0.10 mol/L aqueous solution of aluminum sulfate." I am also given the ka value for the aluminum ion (9.8x10^-6)...but I don't know why I need it. I'm not even sure if I need to use it. Help please?

asked by Stuck on May 1, 2010
37. ## math

what is the concentration of a sugar solution that contains 8g sugar dissolved in 500 ml water? answer in the form of a ratio

asked by cheryl on November 20, 2011
38. ## chem

A weak acid, HA, has an ionization constant of 4.34 x 10-8. If we prepare a solution that is 0.273 M in HA what percent of the acid will be ionized

asked by Anonymous on December 5, 2013
39. ## chemistry

What is the magnitude change in pH when 1.8g of NaOH is added 1L of a solution that is 0.100M in NH3 and 0.100 in NH4Cl? Kb for NH3 1.8 * 10^-5

asked by Anonymous on June 21, 2014
40. ## chemistry

A 116.9 g sample of nitric acid solution that is 70.0% HNO3 (by mass) contains how many moles of HNO3? how did you get the answer

asked by DIANA on December 5, 2011
41. ## Chemisty!

what are the molarities of Mb^2+ ions and Cl- ions in an aqueous solution of 4.00% by the mass magnesium chloride, with a density of 1.15g mL-1?

42. ## logarithms

Solve the logarithm equation. Express the solution in exact form only. log[6](64x^3+1)-log[6](4x+1)=1

asked by Jennifer on January 3, 2012
43. ## Chemistry

A 335 -mL can of soda pop is found to contain 40 g of sucrose (C12H22O11). What is the molarity of the solution with respect to sucrose?

asked by Kelsey G on November 30, 2010
44. ## chemestry

Calculate the pH of a solution obtained dissolving 10 g of NH3 and 15 g of NH4Cl in 300 ml of water (Kb NH3 = 1.8 x10-5).

asked by Anonymous on June 19, 2016
45. ## chemistry 12

A) Calculate [OH^-] in a o.12 M solution of hydrazine, H2NNH2(aq), having K of 3.0x10^-6. B) what is the percent ionization of the H2NNH2(aq) I can't get these for the life of mee!

asked by Jacob on October 5, 2011
46. ## chemistry

150 mL of a 4.00 molar NaOH solution is diluted with water to a new volume of 1.00 liter. What is the new molarity of the NaOH?

asked by vee on October 5, 2011
47. ## chemistry

does the ph change and how much difference is there (double, triple, same or half) for a solution of 0.1M NaHCO3 vs 0.2M NaHCO3 (volume constant)? Kb not known?

asked by Larry on April 13, 2010
48. ## Chemistry

Predict the products of the electrolysis of a solution of aqueous MnSO4 given the following choices: a. H2SO3 (aq) b. O2 (g) c. H2 (g) d. OH- (aq) e. Mn (s) f. e- g. H+ (aq) how is the answer O2 and H2SO3?

asked by Sara on June 16, 2015
49. ## science

what is the concentration of a sugar solution that contains 8 g sugar dissolved in 500 ml of water? explain in ration form

asked by cheryl on November 20, 2011
50. ## Chemistry

What must be the molarity of an acetic acid solution if it has the same percent ionization as 0.150M HC3H5O2 propionic acid,Ka=1.3*10^-5 )?

asked by Tiana on February 16, 2012
51. ## Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

asked by Mike on January 24, 2013
52. ## Chemistry

A current of 3.94 A is pass through a Pb(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 5.40 g of lead?

asked by Brianna on July 24, 2013
53. ## algebra1

can you guys please graph the system of inequalities and clasify the solution of y¡Ü4x+4 y¡Ü-0.25x+4 y¡Ý4x-1 y¡Ý-0.25x-1

asked by jenika on May 17, 2012
54. ## chemistry

Calculate the air concentration (mol/l) of phenol in equilibrium with solution including 100 g/m3 of phenol.(T=25 C)

asked by Osama on September 30, 2014
55. ## chemistry

what volume of 0.150M Li2Sr solution is required to completely react with 130ml of 0.150M Co(NO3)2

asked by Jake on October 17, 2014
56. ## Chemistry

A current of 5.61 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 9.00 g of nickel?

asked by Anon on March 29, 2013
57. ## Chemistry

What volume of concentrated hydrochloric acid (12.0 M HCl) is required to make 2.0 liters of a 3.0 M HCl solution?

asked by Wilson on March 25, 2016
58. ## solution making/ chemistry/biotech

You have 750ml's of a solution that was originally made up using a 20X stock. How much stock was used? I think the answer is 37.5 by dividing 750/20 but I am not sure

asked by frank on February 26, 2015
59. ## Density of CUSO4

I don,t know if this helps but the Soln of CUSO45H2O is 1%, the mass solution is 100g and the mass of CUSO4 5H2O is 1g.

asked by Lorraine on March 6, 2011
60. ## College Algebra

Classify the equation as a conditional equation, an identity, or a contradiction and then state the solution. 24a+14=6(8a+3)-26a+4

asked by Anonymous on September 2, 2017
61. ## chemistry

A solution of 25.0mL of 0.10mol/L hydroiodic acid is titrated with 0.10mol/L ammonia.Determine the pH at equivalence.

asked by rana on January 29, 2017
62. ## MATH

Solve the equation. (Enter solutions from smallest to largest. If there is no solution, enter NONE in the answer boxes.) x2 - 5x + 5 = 0

asked by Anonymous on July 12, 2011
63. ## Chemistry

How many milliliters of a 0.81 M HCl solution are needed to react completely with 2.2 g of zinc to form zinc(II) chloride?

asked by Emily on September 29, 2012
64. ## Chemistry

What is the mass of gas dissolved in a solution at 150kPa if 0.35g of the gas dissolves in 2.0L of water at 30kPa?

asked by Jennifer on March 3, 2013
65. ## Chemistry

How many moles of benzoic acid, a monoprotic acid with Ka=6.4×10^-5, must dissolve in 250mL of H2O to produce a solution with pH=2.04

66. ## Science!

Which of the following is not a process of a stream load? A. Suspension B. Bed Load C. Materials in solution D. Divide Im thinking D but also C?

asked by Morgan on September 8, 2014
67. ## chemistry

A 25.0 mL solution of HCl has been spilt. It took 21.8 mL of saturated 2.5 M NaOH to neutralise the acid. What was the molar concentration of the acid?

asked by sarah on August 7, 2013
68. ## Chem

What is the pH of a 0.115 mol/L solution of sodium acetate, CH3COONa, at 25oC? (pKa=4.74 at 25oC for CH3COOH.)

asked by M on April 3, 2016
69. ## 12 chemistry

What is the average ion concentration in a 7.9 mL saturated solution of calcium hydroxide containing calcium chloride (CaCl2)?

asked by Erica on April 24, 2007
70. ## chemistry

exactly 20 mL of .0520M Pb(NO3)2 is diluted to a final volume of 100 mL. What is the molar concentration of the diluted solution?

asked by chelsea on June 13, 2011
71. ## CHemistry

What is the pH of the resulting solution when 0.20 mole of NaF and 0.05 mole HCl are added to 100 mL water? The Ka for HF is 3.95x10^-4M

asked by Mike on March 1, 2015
72. ## Chemistry, Urgent!

I can't solve this! I keep trying but I can't get it. Suppose 25mL of 1.00M HCl is added to 50mL of 1.00M HF. What is the pH of the HF in this solution? The pH is supposed to be 0.48 Thanks. -K.

asked by Kearstyn on February 26, 2009
73. ## Chemistry

Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)

asked by Grace on April 16, 2013
74. ## Chemistry

Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)

asked by Grace on April 16, 2013
75. ## Maths

How many moles of NaOH can be added to 1L solution 0.1M in NH3 and 0.1 M in NH4Cl without changing the POH by more than 1 unit kb NH3 = 1.8 into 10^_5

asked by Kkk on December 12, 2016
76. ## chemistry

A solution which contains 40.3 g of an unknown molecular compound in 360 g of water freezes at -5.07°C. What is the molar mass of the unknown?

asked by paul on November 26, 2012
77. ## Chemistry AP

Calculate the pH of a 0.44 M aqueous solution of NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the resulting 5.5e-10 in Kw=([H+][Cl-])/[NH4Cl] , using that to get the [H+], but it isn't correct and I don't know what else to

asked by Ethan on February 5, 2015
78. ## Chemistry

An unknown solution may contain one of the ions of the pair below. Devise a test which allows you to distinguish between the ions. Cu2+(aq) and Co2+ (aq)

asked by Charlie on November 29, 2012
79. ## Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

asked by Mike on January 23, 2013
80. ## Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

asked by Mike on January 23, 2013
81. ## chemistry

What is the acid dissociation constant for a 0.010 M solution of the unkown acid HX that has a pH of 2.70 at equilibrium? I know the answer but not how to get it, please help? Thanks in advance.

asked by ciaociao on November 29, 2012
82. ## chemistry

Suppose you mix 20.1 g of water at 66.2°C with 44.6 g of water at 35.7°C in an insulated cup. What is the maximum temperature of the solution after mixing?

asked by caroline on October 29, 2010
83. ## health science chemistry

How many ml of water should be added to 20.0 ml of a stock of 12.0 M HCl solution to make 1.50 M HCl ?assume that the volumes are additive.

asked by konja on May 4, 2016
84. ## Chemistry

When we add a large amount of etilendiamine to a solution NiSO4 a lila precipitate is observed, what is this precipitate)

asked by Mary on November 23, 2007
85. ## Chemistry

The ksp of aluminum hydroxide is 5.6e-17. What is the concentration of hydroxide in a saturated solution? For the answer I got [AlOH] [Al] [OH]^2 5.6e-17 x 3x 5.6e-17 = 3x^4 x = 6.6e-5 Is this right? I'm not sure about 3x^4 part...

asked by Kat on June 5, 2011
86. ## Chemistry

How many moles of mercury will be produced by electrolysis 1 m hg (no3)^2 solution with a current of 2A for 3 hours. Hg (no3)^2=200.6

asked by Amrish gaur on July 25, 2018
87. ## Chemistry

Calculate the mass of sugar, C12H22O11, in 280.4 mL of a 1.49 M solution of sugar. (atomic weights: C = 12.01, H = 1.008, O = 16.00)

asked by Abby on November 3, 2014
88. ## chemistry

calculate the mass in grammes of copper that will be deposited by dissolving 6.5g of zinc in copper tetraoxosulphate(vi) solution

asked by jer on November 8, 2015
89. ## Chemistry

What is the (a) molality, (b) freezing point, and (c) boiling point of a solution containing 2.29 g napthalene (C10H8) in 44.6 g of benzene (C6H6)?

asked by C on April 19, 2013
90. ## science

ind the molality of the solution obtained when 36.5 gram HNO3 is dissoloved in 750 gram water

asked by tanay patel on September 23, 2014
91. ## Chemistry

If 45.8 grams of MgO are dissolved in 205 grams of water, what is the concentration of the solution in percent by mass?

asked by ilyrae on March 21, 2011
92. ## chemistry

Explain in words how you would prepare 250 ml of a 3.000 M solution of Ba(OH)2 starting from a two liter bottle of 12.000 M Ba(OH)2

asked by lalo on October 11, 2010
93. ## Chemistry 30

How do I complete an ICE table for a solution of nitrous acid, HNO2, one of the acids associated with acid deposition?

asked by Iris on December 31, 2012
94. ## science

the ph of a 0.280m solution of a weak base. B has been measured ph --8.69. using this information. calculate the base ionisationconstant kbof b

asked by Emily on September 14, 2012
95. ## chem

A weak acid, HA, has an ionization constant of 9.29 x 10-6. If we prepare a solution that is 0.727 M in HA what percent of the acid will be ionized?

asked by jess on November 30, 2014
96. ## chemistry

What mass of MgSO4 · 7H2O is required to prepare 300 mL of a 0.61 M MgSO4 solution? Answer in units of g

asked by cheri on September 13, 2012
97. ## chemistry

What reagent is commonly used for alcohol oxidation? a. Na2Cr2O7 b.Benedict's Solution c.H2SO4 d. Tollen's Reagent

asked by paul on March 29, 2018
98. ## solution making/ chemistry/biotech

You have 750ml's of a solution that was originally made up using a 20X stock. How much stock was used? I think the answer is 3.75 by dividing 750/20 but I am not sure

asked by sonya on February 23, 2015