# 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 244
1. ## chemistry

if a solution contains 255mL of ethanol and 375 mL ofwater, what is the percent of ethanol in the soution

asked by mike on June 10, 2012
2. ## Chemistry

calulate the molality of solution that contains 51.2g C10H10 in 500mL of CCl4. the density of CCl4 is 1.6g/mL

asked by EM-EM on November 14, 2012
3. ## chemistry

What mass of KNO3 in grams would be required to prepare 0.6 liters of a 1.8 M KNO3 solution?

asked by Megan on November 29, 2011
4. ## chemistry

which solution has the highest concentration of hydroxide ions? a ph=7.93 b ph=12.59 c ph=7.00 d ph=9.82 e ph=3.21 i know the answer is 7 but why is it seven? would it be different if it said hydronium ions?

asked by jessie on December 11, 2010
5. ## chemistry

You have 333 mL of alkaline solution at pH = 11.1. You wish to neutralize this by reacting it with 222 mL of acid. What must be the value of the pH of the acid?

asked by barco on May 31, 2013
6. ## chemistry

What is the percent by mass of NaHCO3 in a solution containing 60 g of NaHCO3 dissolved in 500 mL of H2O

asked by brooke on March 23, 2011
7. ## Chemistry

Okay, so how would i work out: How would you prepare 1.00 L of a .5M Solution of NiCl2 from the salt NiCl2 x 6H2O, Because what im doing is not working. :/

asked by Kenz on February 5, 2012
8. ## chemistry

how much NaOH (in grams)do you need to weigh ouMt to make 250ml of a 0.5M naoh solution.... i got 5.0g is this right?

asked by aaa on February 5, 2012
9. ## math

Which quadrant does the solution of the system fail? x+y=4 2x-y=2 Please help I don't know what to do. I don't what the answer, just want to be guided to it! Thank you (:

asked by Country_cutie XD on December 17, 2013
10. ## Math

For this inequality 3x^(2) - 2x -1 > or equal 0 I get x=1 , x=-1/3 would the solution set become {x|1 < x < -1/3} I wasn't sure about the sign, if it should be greater than or equal to .

asked by Amy~ on September 28, 2010
11. ## chamistry

how do you calculate the mole fraction of HCl in an acqueous solution that contains 33.6% HCl by mass?

asked by franco on February 23, 2011
12. ## Chemistry

How many grams of AgNO3 (silver nitrate) are contained in 425 mL of a .15 M solution of AgNO3?

asked by Jessica on January 29, 2013
13. ## pre calc

Solve the lograthmic function: ln(X+5) = ln(X-1) - ln(X+1) The answer has no solution but I do not know how to come to that answer. Help is greatly appreciated!

asked by Laura Grace on March 23, 2011
14. ## chemistry

a bottle of 12.o M HCL has only 49.8 ml left in it. What is the molarity of the hcl if the solution is diluted to 350ml.

asked by wendy on October 14, 2011
15. ## chemistry

Why will a new nail react faster in copper sulfate solution than an old, rusty nail?

asked by valentina on February 6, 2011
16. ## Chemistry

What is the pH of a solution prepared by mixing 500mL of 2.0M HCN (Ka= 4.9x10^-10) with 500mL of 1.0 M KOH?

asked by George on March 10, 2015
17. ## math

On a number line, the coordinate of A is -18 and that of B is 18. C is a point on AB such that AC:CB = 4:5. What is the coordinate of C? with solution pls... tnx...

asked by HELP HELP HELP MNHS on January 30, 2013
18. ## Math

asked by randall on October 30, 2011
19. ## Chemistry Lab

If 12.50 mL of 0.324 M HCl is diluted to 250.00 mL, what is the concentration of HCl in the final solution?

asked by Thao on May 10, 2011
20. ## General Chemistry

What is the molality of KBr in a solution made by dissolving 2.21 g of KBr in 897g of water

asked by Tyra on February 7, 2012
21. ## Chemistry

How do I prepare 80 mL of 0.10 M HC2H3O2 from a 6.0 M solution of Acetic acid? How do I prepare 80 mL of 0.10 M NH3 from 6.0 M ammonia?

asked by knswimmerkat on February 24, 2011
22. ## Chemistry

What is the pH of a 0.94 M solution of HBrO that is also 0.59 M in magnesium hypobromite, the salt of it's conjugate base? The Ka for HBrO = 2.8 X 10-9.

asked by Carl on February 23, 2011
23. ## Chemistry

How much water is needed to prepare 8M of NaOH solution with 1kg of NaOH pellets?

asked by Chong Wee on February 26, 2014
24. ## Chemistry

How many moles of K2O are present in 40.0 mL of a 0.3 M K2O solution? I also need the formula, data, and answer.

asked by Jaret on October 10, 2013

How many liters of .0020 M iodine solution can be made from .050 moles of iodine (I2)?

asked by Kellie on November 23, 2011
26. ## Science

How many grams of CH3SH must be added to water to prepare 410mL of a solution that is 2.5 M CH3SH?

asked by Eli on November 4, 2014
27. ## Chemistry

How do I calculate the solubility of a compound in grams of solute per 100 grams of solution?

asked by Matt on April 16, 2011
28. ## Chemistry

What is the molar concentration of nitrate ions in a 0.161M magnesium nitrate(aq) solution?

asked by Amber on October 22, 2012
29. ## Chemistry

how many grams of sucrose are needed to make 100 ml of a 10^-2 Molarity sucrose solution?

asked by Ty on August 28, 2011
30. ## chemistry

What is the original molarity of an aqueous solution of ammonia (NH3) whose pH is 11.10 at 25 degrees C? (Kb for NH3=1.8 x 10^-5)

asked by Natalie on December 8, 2010
31. ## chemistry

How many moles of lilthium chloride are dissolved in 3.00 L of a 0.200 M solution of lithium chloride?

asked by Tina on July 8, 2010
32. ## chemistry

how much NaOH would be needed to dissolve in H2Oto prepare 2.00L of a NaOH solution in which [OH-]=0.95 M?

asked by lindsey on March 29, 2012
33. ## Chemistry

If you have 0.150 M HCl solution available, calculate the volume of HCl(aq) necessary for this reaction. _______ml

asked by amber on June 24, 2014
34. ## Chemistry

Determine the mass (in grams) of a 1% solution of Manganese(II) Sulfate that will contain 0.0403 grams.

asked by Bethany on February 1, 2015

If the concentration of I^-1 is found to be 2.4 x 10^-3 mol/L in a saturated solution of PbI2. What is the Ksp of PbI2?

asked by Kevin on July 28, 2016
36. ## Math

Help please on how to solve the following problem: If E,N,O,T, and W each represent a different integer, can you find more than one solution to this problem? Thanks in advance!

asked by Dylan on November 13, 2007
37. ## chemistry

What is the pH of a solution that is .200M in acid and .500 m in the corresponding salt if the weak acid ka= 5.0x10^-7

asked by Rae on September 2, 2010
38. ## Chemistry

19.2 mL H2SO4 solution (d = 1.727 g/mL, 80.0 percent H2SO4 by mass) ____ mol

asked by Dewey on April 17, 2011
39. ## algebra

A 3 by 5 inch picture is put into frame with a mat that has width x. Draw picture inside the frame, write the expression of the width and length of the frame AND the picture together. If the total area of the frame with the picture is 35 in ^2, find the

asked by Mark on March 30, 2016
40. ## Math

From an observation tower that overlooks a runway, the angles of depression of point A, on one side of the runway, and point B, on the opposite side of the runway are, 6 degrees and 13 degrees, respectively. The points and the tower are in the same

asked by jasmine on July 21, 2013
41. ## spanish

A few months ago my teeth started hurting a lot. I went to the dentist's office to get them checked. When I arrived, the dentist told me that they were very crooked. He said he was going to give me some shots and then put braces on them. After everything

asked by y912f on June 11, 2009
42. ## math concepts

Matthew sits at his desk unable to figure out the answer to a division problem. He reaches into his desk and pulls out a calculator. What is the correct response for Matthew's teacher to have? A. "Put that calculator away, you can't cheat on your work." B.

asked by lauren on February 23, 2015
43. ## Mathematics concepts

Matthew sits at his desk unable to figure out the answer to a division problem. He reaches into his desk and pulls out a calculator. What is the correct response for Matthew's teacher to have? A. "Put that calculator away, you can't cheat on your work." B.

asked by lauren on February 24, 2015
44. ## science

1)effects of impurities on the boiling point of an organic compound. 2) purposes why melting points are determined. 3)suppose i am taking a melting point and the compound disappears, what must i do? Have you put any thought into these or do you expect us

asked by bugalo on August 15, 2007
45. ## English 10

1. Sensory language is also known as __________. syntax broadsides imagery irony 2.Which excerpt taken from the poem “Birmingham Sunday” by Richard Farina is an example of sensory language? A.“clouds they were grey” B.“She asked for a blessing"

asked by Juliet Fonterhouse on November 18, 2014
46. ## Science

Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically

asked by Unicorn on December 11, 2016
47. ## Science

Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically

asked by Unicorn on December 10, 2016
48. ## Quantatative Analysis

"what volume of .50 m h2so4 must be added to 65 ml of .20 m h2so4 to give a final solution of .35 M? assume volumes are additive"

asked by Stumped on October 29, 2011
49. ## Science

what is a the soild material in a solution called? It is called the solute; however, there are many solutions in which no solid is involved. Thank you for helping

asked by Derek on January 16, 2007
50. ## chemistry

calculate the molecular weight of a substance which freezes forms a 7.00% by mass solution in water which freezes at -0.89°C.

asked by iain on March 7, 2010
51. ## precalculus

When using Gaussian elimination to solve a system of linear equations, explain how you can recognize that the system has no solution.

asked by Anonymous on November 30, 2016
52. ## chemistry

calculate the volume of 0.050 acetic acid needed to prepare 4.0 L of aceic acid solution with a PH of 3.80 L=

asked by saud on December 2, 2011

the volume of alcohol present in 620 mL of a 40% (v/v) solution of alcohol is ______? A. 372 mL B. 40 mL C. 248 mL D. 580 mL

asked by Kathie on May 4, 2010
54. ## Chemistry (Concentratrion/molarity)

A 25.00 mL aliquot of HCl of unknown concentration is titrated with 25.62 mL of 0.1011 M NaOH. What is the molarity of the HCl solution?

asked by Ray on November 1, 2016
55. ## math

How many ways can 9 people be arranged to sit at a round table if Sam can not sit between Ron and Ed? My solution: 7! Thanks for your help.

asked by Jenna on October 15, 2016
56. ## chemistry

The Measured voltage of the cell Pt H2 (1.0atm) H+ // Ag+ (1.0M) Ag ia 1.02 V at 25degrees. Gven E cell is 0.80V, calculate the pH of the solution.

asked by Ali on November 2, 2009
57. ## math

Solution:if a car traveled 5 km/h.Faster it would take one hour less to travel210 kilometer.What is the speed of car and what time does it take?

asked by Anonymous on December 3, 2011
58. ## Chemistry

If 0.250 L of aqueous solution with a density of 1.00 g/mL contains 13.7 g of pesticide, express the concentration of pesticide in (a) ppm and (b) ppb.

asked by MONICA on September 15, 2016
59. ## chemistry

When KI is dissolved in water, the solution will be ___. a) Strongly Acidic b) Slightly Acidic c) Neutral d) Basic

asked by Anonymous on July 19, 2010
60. ## chemistry

When KI is dissolved in water, the solution will be ___. a) Strongly Acidic b) Slightly Acidic c) Neutral d) Basic

asked by Anonymous on July 19, 2010
61. ## chemistry (solutions).

how do you turn a saturated solution into an unsaturated one Add solvent. Some of the solute will dissolve in the added solvent.

asked by lisa on February 26, 2007
62. ## Chemistry

What volume of 14.1M HBr is required to make 250mL of 1.25M HBr solution by dilution with water?

asked by Kat on February 4, 2011
63. ## ap 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 anonymous on August 9, 2016
64. ## trig

Find all solutions in the interval [0,2π) for cos(x - π/6) = 1 + cos(x + π/6). Show work, please and state in solution set.

asked by Jane on March 8, 2016
65. ## lab

i need 200mL of an 8 molar solution of dilute acid, and my stock cconcentrate is 18 molar, how much of the concentrate, and how much water will i need?

asked by sue on January 31, 2011
66. ## Chemistry

What mass ( g ) of the solvent chloroform that should be added with 5287 mL of the solute hexane to produce a solution that is 7.11 m hexane.

asked by Anonymous on March 2, 2010
67. ## chemistry

What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water?

asked by Anonymous on August 19, 2011
68. ## Finance

what is the solution to bunyan lumber lumber 45-year harvest based on \$300,000 contribution

asked by sharon on December 19, 2011
69. ## bio

how many grams of sucrose would you need to prepare 10 mK of ,o1M solution of sucrose(FW+342g/mole)? show your work

asked by milly on September 1, 2011
70. ## chemistry

If 5.6 grams of potassium hydroxide is added to enough water to make 950 ml of solution, what is the concentration of the potassium?

asked by gary on June 1, 2014
71. ## Chemistry

If 56 mL of 1.93 M hydrochloric acid is mixed with water to create a solution with a concentration of 0.9 M , how many liters of water were added?

asked by Mikay on May 31, 2014
72. ## Chemistry

If 0.08 mol of LiCl is added to a one liter solution that has dissolved 0.01 mol of PbCl2, will a precipitate occur?

asked by Allie on March 4, 2014
73. ## Chemistry

A 0.5 molal urea solution causes freezing point depression of two degrees .what is the molal delression constant ????

asked by Prithvi on May 2, 2014
74. ## chemistry

the molar solubility of PbS, in a 0.150 M ammonium sulfide (NH4)2S solution is? The Ksp for PbS= 3.2E-28.

asked by Tara on December 15, 2010
75. ## Chemistry

How many grams of sulfur (S8) must be dissolved in 100.0 naphthalene (C10H8) to make a 0.13 solution? answer in grams.

asked by Jeremy on February 3, 2012
76. ## Chemistry

How many grams of Calcium Nitride can be produced using the calcium contained in 100 ml of a 4 Molar beryllium solution?

asked by momo on April 15, 2012
77. ## math

a chemist has 3 1/3 fluid ounces of a solution. how many containers can he fill if each container holds 5/12 fluid ounce

asked by Anonymous on October 15, 2015
78. ## chemistry

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 July 5, 2016
79. ## chemistry

a supersatured sugar solution (can/ cannot) be used in a calibration graph. What kind of graph, but probably not since you won't know the degree of supersaturation.

asked by hawkstar on October 4, 2006
80. ## BIO/CHIM

How many grams of sucrose would you need to prepare 10 mL of .01M solution of sucrose(FW+342g/mole)? show your work

asked by milly on September 1, 2011
81. ## Chemistry

What are the concentrations of HSO4- and SO42- for a 0.0050 M sulfuric acid solution? We are trying to find x but not sure how to find it on the calculator, please help!!!

asked by Haley&Emily on February 21, 2014

Statement: Most compounds that produce this in aqueous solution are ionic. Does this statement refer to an acid or a base or both?

asked by Al on January 2, 2011
83. ## CHEM 152

Will a precipitate be observed if 0.10 mol Ag+ and 0.001 mol SO42- are added to make 1.0 L of solution? (Ksp = 1.4 x 10-5)

asked by Car on June 27, 2010
84. ## Science

A solution containing 3.22g of solute in 40.0g of 1,4-dichlorobenzene and its freezing point is 49.2 C. Calculate the molar mass of the solute.

asked by Nancy on May 30, 2015
85. ## Math

which ordered pair is the solution of the following system of equations? y=2x-3 x+y=3 1) (1,2) 2)(2,1) 3)(3,0) 4)(3,3) MY work: y=2x-3 x+(2x-3)=3 3x-3=3 +3 +3 3x/3=6/3 x=2 x+y=3 2+y=3 -2 -2 y=1 so I got (2,1) which would be answer 2 Is this correct? Thanks

asked by B8 on January 10, 2014
86. ## Algebra

Write a direct variation equation that relates x to y. Then solve. Show both the equation and the solution. If y = 8 when x = 4, find y when x = 5.

asked by joshua on January 5, 2011
87. ## managerial economics

given π=1000x - 2x - xy + 180y - 4y. subject to profit constraints x + y =30. using solution method, what is the optimal profit under contraint

asked by yahaya on February 11, 2016
88. ## Chemistry

What concentration of chloride ion is required to precipitate 99.9% of the lead ion from a solution with [Pb^2+]= 0.045 mol/L ?

asked by Tanner on March 4, 2012
89. ## Chemistry

How many milliliters of a 0.66 M HCl solution are needed to react completely with 1.9 g of zinc to form zinc(II) chloride?

asked by Anon on October 4, 2011
90. ## chemistry

What is the molar concentration of sodium in a 200mL solution prepared from 1.359 grams of sodium phosphate?

asked by Anonymous on October 6, 2009
91. ## chemistry

calculate the volume of 0.080 acetic acid needed to prepare 4.0 L of aceic acid solution with a PH of 4.00 L=

asked by saud on December 3, 2011
92. ## Analytical Chemistry

how much volume of h2so4 is needed to produce a 0.953 Normality) of h2so4 if the 1 liter solution is 1.14 g/mL in density?

asked by Sham on August 13, 2016
93. ## Math- Algebra II

Please check if I did this right... √(2x+1)+7= 3 -7 -7 √(2x+1)= -4 Square everything √(2x+1)^2= -4^2 2x+1=16 -1 -1 2x=15 divide by 2 on both sides x=7.5 CHECK: (Plug it in) √(2(7.5)+1)+7= 3 √(16)+7= 3 4+7=3 11 doesn't equal 3 so the answer is no

asked by Lala on February 16, 2011
94. ## chemistry

calculate the grams of solute neede to prepare 24 grams of a 13.5% by mass scurose (c12h22o11) solution

asked by jason on March 27, 2014
95. ## chemistry

a 500 ml portion of .0020 M Na2C2O4 solution is able to dissolve .47g of MgC2O4. What is the Ksp for MgC2O4

asked by Raj on November 24, 2009
96. ## Chemistyr

Eighty grams of sodium nitrate dissolved in 50 grams of water will make what type of solution?

asked by Kayla Johnson on March 28, 2012
97. ## Chemistry

How many milliliters of a stock solution of 2.00 M KNO3 would you need to prepare 250 mL of 0.150 M KNO3? Please show work.

asked by MEGAN!!!! on April 30, 2010
98. ## chemistry........help!! =)

How many grams of FeSo4 are required to prepare 0.50 L of a 0.010 M FeSO4 solution? I don't need the answer just shown how to do it! thanks

asked by Stacy on December 13, 2010
99. ## chemistry

What is the molarity of H3O+ in a 4.97×10-2 M NH4Cl solution that hydrolyzes according to the equation. NH4+(aq) + H2O(l) = H3O+(aq) + NH3(aq)

asked by uci student on May 4, 2010
100. ## Chemistry

Calculate how many grams of FeSO4 . 7 H2O (MW = 278.02 g/mol) will be needed to prepare 1 mL of a 0.2 M FeSO4 solution? Am I right when I say we'd need

asked by Feufolia on February 25, 2016