# 5.70 g of NH4Cl is added to 13.3 g of water. Calculate the molality of the solution

55,059 results, page 56
1. ## i need help with science pls

]Most of the drinking water in a location comes from a river. A steel plant is to be built close to the river. It would provide jobs and facilities to many people in the location. The steel plant would use a huge amount of river water. This might cause

asked by Oscar on April 12, 2016
2. ## engineering

any help is greatly appreciated. I am so hopeless now. Water tower problem. The pressure in each house is 250 kPa and the average pressure drop is 50kPa. What should the height of the water tower? Height of the water level in the tower. What is the

asked by katy on September 28, 2015
3. ## Calculus

The temperature of a pan of hot water varies according to Newton's Law of Cooling: dT/dt=-k(T-A), where T is the water temperature, A is the room temperature, and k is a positive constant. If the water cools from 90°C to 85°C in 1 minute at a room

asked by nan on March 10, 2016
4. ## Physics 270-1 Applied

A rock is thrown down with an initial speed of 30.0ft/s from a bridge to the water below. It takes 3.50s for the rock to hit the water. (a) Find the speed (in ft. /s) of the rock as it hits the water. (b) How high is the bridge above the water?

asked by jason on May 8, 2014
5. ## math

can anyone help please, i need a simple formula for working out taxes.if i had any number i need to know what the base was before 16% tax was added. i know the formula if the tax was 17.5%,what ever the total is if you divide that by 47 then x that by 7

asked by simon on April 15, 2007
6. ## algebra

At a crime scene, police officers find a murder victim in a tub full of warm water. A thermometer shows that the water temperature is 75 degrees F and the air temperature is 70 degrees F. It is known that most people fill a tub with water at 100 degrees F.

asked by Andrea on December 12, 2012
7. ## Physics

Olympic diver Matthew Mitcham springs upward from a diving board that is 3.00 m above the water. He enters the water at a 79.0 degree angle with respect to the water surface, at a speed of 9.01 m/s. Determine the magnitude of his initial velocity.

asked by Rachel on June 19, 2015
8. ## physics

Olympic diver Matthew Mitcham springs upward from a diving board that is 3.20 m above the water. He enters the water at a 73.0 degree angle with respect to the water surface, at a speed of 9.36 m/s. Determine the magnitude of his initial velocity.

9. ## chem 101

A one pound piece of iron was heated to 1000 °C and then quenched in a bucket containing one gallon of water at 25 °C. What was the temperature of the water after the iron and the water came to thermal equilibrium? correct answer is 37C

asked by Anonymous on April 11, 2012
10. ## Geometry

If a rotating water sprinkler is a set tto spray water out at a radius of 40 feet around a circular revolution of 120 degrees what is the area of the lawn that the water from the sprinkler would then cover

asked by Anonymous on April 13, 2016
11. ## Mathematics

The height in metres of the water in a harbour is given approximately by the formula d=6+3cos30t, where t is the time in hours from. Find a) The height if the water at 9:45pm b) The highest and the lowest water level and occur

asked by David on September 20, 2017
12. ## Science HELP!

When diving into water, it is important to look before diving to avoid (blank)damage your nervous system. A. Deep water B. Underwater hazards C. living creatures D. Water toys Is the answer B? Thanks

asked by Anonymous on October 25, 2014
13. ## Physics

A stream of water emerges horizontally from firehouse at velocity of 15.0 m/s. If the nozzle is 10.0 m above the ground, find a. the time required for the water to reach the ground b. the horizontal distance traveled by the water

asked by Eclipse on July 22, 2017
14. ## Chemistry

Glycerol is a nonvolatile water soluble material. It's density is 1.25g/ml. Predict the vapor pressure of a solution of 2.40E2 ml of glycerol, in 385ml of water, at the normal boiling pt of water.

asked by Jonah on April 7, 2013
15. ## physical science

A rectangular container measuring 16cm times 46cm times 67 cm is filled with water what is the mass of this volume of water in kilograms and grams? (take the density of water to be 1000 kg/m cube

asked by vicky on January 26, 2012
16. ## Physical Education help

When diving into water, it is important to look before diving to avoid (blank) that could damage your nervous system. A. Deep water B. Underwater hazards C. Living creatures D. Water toys Is the answer B? Thanks

asked by Anonymous on October 25, 2014
17. ## Physics

When a load of 0.97 106 N is placed on a battleship, the ship sinks only 3.0 cm in the water. Estimate the cross-sectional area of the ship at water level. (The density of sea water is 1.025 103 kg/m3.)

asked by Lauren on December 12, 2012
18. ## science

ms. janick's class wants to measure how quickly water evaporates. they measure the level of some water in a glass for 4 days and record the levels. which graph shows that the water evaporated over time?

asked by Anonymous on October 17, 2018
19. ## physics

Given: latent heat of fusion of water 3.33x10^5 J/kg. A 147 g cube of ice at 0 degress C is dropped into 1.3 kg of water that was originally at 79 degrees C. What is the final temperature of the water after the ice melts.

asked by Ericka on December 8, 2009
20. ## Physics

A 123 g cube of ice at 0◦C is dropped into 1.9 kg of water that was originally at 81◦C. What is the final temperature of the water after after the ice melts? The latent heat of fusion of water is 3.33 × 105 J/kg . Answer in units of ◦C

asked by Tiffany on January 30, 2013
21. ## physics

Supertank has engine exerting a 75x10 cube N, Force against water drag at 40x10cubeN, Calculate tensions in tugs cable, Supertank is 1piont5x10eight kg 30 degrees vertical pull, Acceleration 2x10negative3 m/s?

asked by june on March 2, 2012
22. ## Chemistry

What mass of silver chromate can be dissolved in 125 mL of water? How do I find this out? Ag2CrO4 is not very soluble. Look up the solubility product and calculate the solubility from Ksp. Wow, thank you so much. I realised that I wrote my chemical formula

asked by HelpMe on October 29, 2006
23. ## chemistry

the fictitious compound pandemonium carbonate has a ksg=3.091*10^-9 M 3 in water at poor temperature .calculate the solubility of PnCo3 in an aqueous solution of 1.11 M pandemonium sulfate. express your answer in units of molarity.

asked by himani. on May 5, 2013
24. ## CHEMISTRY

18cm^3 of 1.0M H2SO4 just reacted with 24cm^3 of 1.5M NaOH to form sodium sulfate & water. Calculate the amounts in moles of sulfuric acid & sodium hydroxide reacting & write an equation for the reaction.

asked by Janey on October 12, 2013
25. ## Chem 2

So i need to calculate the pH of 50ml water (de-ionized) with 1 ml of 1M HCl. So the moles of HCl i think is .001 divided by the total amount of solution (.051). I get 0.0196, then i take the negative log of this number and it comes out to 1.71 roughly.

asked by Kyle on October 14, 2013
26. ## chemistry

24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.

asked by Chaitanya on April 19, 2008
27. ## chemistry

24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.

asked by Ericka on April 19, 2008
28. ## chemistry

24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.

asked by Ericka on April 19, 2008
29. ## chemistry

24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.

asked by Ericka on April 19, 2008
30. ## physics

swimmers often notice that when they start to swim in a still body of water after a hot sunny day the surface water is warm but the deeper water is cold. why this happens?explain. (is it that the heat of the sun can only heat up the surface of the water?)

asked by Pauline on May 3, 2007
31. ## chemistry

1. When gases are collected using displacement of water, some water vapor mixes in with the gas being collected. A student performed a similar experiment in which 35.2 ml of H2 gas was collected over water at a temperature of 21 degrees Celsius. If the

asked by preshi on May 2, 2012
32. ## Physics

A flying squid (family Ommastrephidae) is able to "jump" off the surface of the sea by taking water into its body cavity and then ejecting the water vertically downward. A 0.80 kg squid is able to eject 0.32 kg of water with a speed of 20 m/s. (a) What

asked by xxxxxxx on April 10, 2016
33. ## Chemistry - Science

A 6.70 g sample of a binary mixture of silver (I) nitrate and sodium nitrate is completely dissolved in water to make a solution. Aqueous barium chloride is then added to this solution in excess to form 3.60 g of silver chloride solid. What is the percent

asked by Anonymous on March 25, 2014
34. ## Chemistry

A salt may be prepared by the reaction of one salt with another salt, particularly if one of the products is insoluble. In which one of the following reactions is this demonstrated? (NH4)2CO3 + K2SO4 \(->NH4)2SO4 + K2CO3 CuCl2 + 2 NH4NO3 \->Cu(NO3)2 + 2

asked by Anna on November 7, 2014
35. ## Chemistry

When ammonia was reacted to copper(ll)oxide at a high temperature, it will produce nitrogen gas, copper metal and water vapour. an experiment was done with 18.0g of ammonia was reacted with 90.0g of copper(ll)oxide. (a)Write balance chemical equations for

asked by Reezyy on December 1, 2016
36. ## physics

at a picnic a frind asks you for advice about cooling his warm bottle of soft drink.he can submerge the bottle in a bucket of water, or wrap the bottle in a cloth and then wet it with the water from the bucket.which should he do? i think the first option

asked by Emma on May 14, 2007
37. ## CHEMISTY HOMEWORK HELP ASAP

1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of

asked by Always on November 24, 2014
38. ## Chemistry Homework Help Please!

1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of

asked by Always on November 24, 2014
39. ## math

A tank was 3/5 filled with water. After removing 120 litres of water from the tank it was 1/5 filled. a)Find the amount of water the tank can hold when completely filed. b)If one litre of water has a mass of 1 kg, find the mass of water in the tank when

asked by sherika on February 13, 2013
40. ## ELECTROLYSIS OF ZnI2

ELECTROLYSIS OF ZnI2 if you have done this experiment Please help me answer these questions as i missed the last half of my chem lab today. 1. What color change occurred when the wire is first heated. -next question is... What is the identity of the

asked by sean on April 18, 2013
41. ## General Chemistry

When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3(s)+2HCl(aq)--> CaCl2(aq)+H2O (l)+CO2(g) How many grams of calcium chloride will be produced when 32.0 g of calcium carbonate are combined

asked by Alexis on February 6, 2013
42. ## Physics

A person takes in a breath of 13*C of air and holds it until it warms to 36.5*C. The air has an initial volume of 0.24 L and a mass of 0.00077kg. a. Determine the work done by the air on the lungs if the pressure remains constant at 1 atm. Answer in units

asked by Laura on January 2, 2011
43. ## Biology

In class, I did an experiment with water and iodine solution in a beaker and also starch in a dialysis tube tied and placed in the beaker. There were discussion questions I couldn't answer surely... please check my answers. 1. a)Use your results to

asked by CrissyXD on April 3, 2012
44. ## Chemistry

Can you explain the process for solving this problem (this one is more complicated than the example in our book): A solution contains both I^- and Cl^-, each at a concentration of 3.0x10^-2M. What concentration of Pb^+2 is required to precipitate the

asked by Lacey on February 19, 2007
45. ## Math PLZ HELP!!!!

A tank that holds 4000 gallons of water will drain completely into a reservoir in 32 minutes. The volume of remaining water in tank after time t is given by the function: V(t)=4000(1-t/32)^2, 0

asked by Jessy on December 18, 2013
46. ## Chemistry

A 5.00 gram sample of aluminum pellets (specific heat capacity = 0.89 J/g*C) and a 10.00 gram sample of iron pellets (specific heat capacity = 0.45 J/g*C) are heated to 100.0 *C. The mixture of hot iron and aluminum is then dropped into 97.3 gram of water

asked by Anonymous on October 12, 2010
47. ## physics

A .5kg cup of water is swung around in a vertical circle just fast enough so the water can't fall out. What's the least amount of acceleration this water and cup would have on them?

asked by Anonymous on December 18, 2012
48. ## math

a picher cotained 2 liters of water justin drank 355 milliliters of the water how many milliliters of water were left in the pitcher

asked by courtanay on January 5, 2011
49. ## chemistry

A cylindrical glass of water (H2O) has a radius of 6.12 cm and a height of 9.91 cm. The density of water is 1.00 g/cm3. How many moles of water are contained in the glass?

asked by Anonymous on November 28, 2013
50. ## physics

A cylindrical glass of water (H2O) has a radius of 6.12 cm and a height of 9.91 cm. The density of water is 1.00 g/cm3. How many moles of water are contained in the glass?

asked by Anonymous on November 28, 2013
51. ## Chemistry

A student mixes 95.1g of water at 77.5 degree C with 42.7g of water at 141.1 degree C in an insulated flask. What is the final temperature of the combined water?

asked by Linetta De La Cruz on October 31, 2010
52. ## geometry

A rectangular container is 5 cm. wide and 12 cm. long and contains water to a depth of 7 cm. A stone is placed in the water and the water rises 1.7 cm. Find the volume of the stone.

asked by Anonymous on August 6, 2012

A cylindrical glass of water (H2O) has a radius of 3.49 cm and a height of 9.85 cm. The density of water is 1.00 g/cm3. How many moles of water are contained in the glass?

asked by Bobby on October 27, 2014
54. ## physics

A 10 cm by 10 cm by 10 cm wood block with a density of 700 kg/m^3 floats in water. a. What is the distance from the top of the block to the water if the water is fresh? b. If it's seawater?

asked by luma on January 25, 2016
55. ## math

a water pump has a capacity to fill water at 10 liters per second. How much time will it take to fill the water tank of 80cm .60cm.50cm?

asked by ajAy on June 5, 2016
56. ## chem

The pH of saturated Sr(OH)2 is found to be 13.12. A 15.0ml sample of saturated Sr(OH)2 is diluted to 250.0ml in a volumetric flask. A 15.0ml sample of the diluted Sr(OH)2 is transferred to a beaker, and some water is added. The resulting solution requires

asked by tomi on April 2, 2009
57. ## math

A shop keper buy 40kg of fruits for #120. he sells 20kg at #5 per Kg, 10kg at #2 per kg and the remaining 5kg at 50kobo. calculate amount he realise from d sales .calculate total profit. calculate percentage on his outlay of #120

asked by opeoluwa on November 21, 2018
58. ## Physics

A pipe carrying water is laid out over level ground. One segment of the pipe has a diameter of 2.22 cm and the next segment has a diameter of 1.82 cm. In the wider segment, the water pressure is 83,700 Pa and the water is moving at 2.77m/sec. 1-what is the

asked by Anonymous on December 8, 2017
59. ## chem

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.2L of water upon warming from 25C to 50C . Assume that the water is initially saturated with nitrogen and oxygen gas at

asked by rc on January 25, 2010
60. ## Chemistry

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.5L of water upon warming from 25C to 50C . Assume that the water is initially saturated with nitrogen and oxygen gas at

asked by Anonymous on May 9, 2015
61. ## math,help,bobpursly

What are some challenges for rational expressions? Also on my previous question about why are polynomials important bobpursly can you expalin it to me towards what you ment about your responce because i still do not undertand...thanks when you get a

asked by jas20 on March 5, 2007
62. ## Physics

a tourist drops 1-liter water filled baloon from the top of the Washington monument (170 m high).If air resistance is negligible and almost all the motion energy heats the water,find the increase in temperature of water when it hits the pavement?

asked by Fildzah Istiqomah on November 12, 2011
63. ## Physics

a tourist drops 1-liter water filled balloon from the top of the Washington monument (170 m high).If air resistance is negligible and almost all the motion energy heats the water,find the increase in temperature of water when it hits the pavement?

asked by Izthy Fildzah on November 12, 2011
64. ## Thermodynamics

12 kg of water in an insulated container is at 30 C. Initially, only 18 percent of the water is in the liquid phase. An electric heater, connected to a 120-V source and 9 A, is used to heat the system. Determine the time required to vaporize the entire

asked by Anonymous on November 5, 2014
65. ## chem 102

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.1L of water upon warming from 25 ∘C to 50 ∘C. Assume that the water is initially saturated with nitrogen and oxygen

asked by ieshia on February 18, 2014
66. ## math

Initially a pool contains 350 gallons of water. A hose is placed in the pool, and the water is turned on. The hose adds 4.8 gallons of water per minute. Write an equation that shows the relationship between the total amount of water in the pool, V, and the

asked by jeng on November 15, 2009
67. ## chemistry

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Sarah on February 19, 2012
68. ## chemistry

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Janice on February 19, 2012
69. ## Chemistry

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 59.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Melody on February 18, 2012
70. ## Chem

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 41.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Andrew on February 21, 2012
71. ## Chemistry

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Ariel on February 19, 2012
72. ## Chemistry

How much boiling water would you need in order to raise the bath to body temperature (about 37)? Assume that no heat is transferred to the surrounding environment. Imagine that your water heater has broken, but you want to take a bath. You fill your

asked by Bella on November 4, 2010
73. ## ocean county college

A 150 g sample of metal at 55.0 C raises the temperature of 150 g of water from 23.0 C to 35.0 C. Determine the specific heat of the metal in J/g C. Hint: #1 First find heat absorbed by water using formula q = mass x specific heat x change in temp (of

asked by adina on March 21, 2010
74. ## chemistry

The fermentation of sugar (C6H12O6) to form ethanol (C2H5OH) and carbon dioxide (CO2) occurs according to the following equation: C6H12O6(aq) ¡ú 2 C2H5OH(aq) + 2 CO2(g) kJ mol¨C1 ¦¤Hf (C6H12O6(s)) is ¨C1275 ¦¤Hf (C2H5OH(l)) is ¨C277 ¦¤Hbond

asked by mailyn on November 3, 2010
75. ## Physics

What is the total amount of potential energy that can be stored in a 10,000 gallon water tower built with the water tank 61.50 m above ground level?

asked by Matt on February 14, 2017
76. ## Chemistry

I am designing a lab right now, and I want to know: if I fill a beaker with cold water from the tap and submerge a sample of solid metal, after a couple of minutes, the metal should be the same temp as the water, right? Would it be quicker to use hot water

asked by Stuck on February 19, 2010
77. ## Physics

Water flows at 0.25L/s through a 9.0-m-long garden hose 2.0cm in diameter that is lying flat on the ground.The temperature of the water is 20degC. What is the gauge pressure of the water where it enters the hose? in Pa

asked by Cassie on December 5, 2012
78. ## Chemistry

A chunk of copper weighing 18.9 grams and originally at 97.63oC is dropped into an insulated cup containing 77.9 grams of water at 22.44oC. Assuming that all of the heat is transferred to the water, the final temperature of the water is what in C.

asked by Jackson on February 19, 2010
79. ## Science

Determine the final temperature when 100 g of water absorbs 1000 J of thermal energy, given that the initial temperature of the water is 20.0°C. The theoretical specific heat capacity of water is 4.19 J/g·°C. Show your work below.

asked by Desirae on May 22, 2015
80. ## Chemistry

5.00 liter steel cylinder is filled with water vapor at 100 °C and 650 mm Hg. Determine the mass of water that condenses to a liquid when the closed system is cooled to 20 °C. The vapor pressure of water at 20 °C is 18 mm Hg. 6.

asked by Anonymous on July 12, 2011
81. ## chemistry

The heat of vaporization of water is 40 kJ mol-1 at 100oC. What percentage of the heat supplied to vaporize the water can be converted into work if the water is vaporized at 100 degrees C against a constant pressure of 1 atm?

asked by nath on November 8, 2011
82. ## physical geoprahy

Assume that a parcel of air is forced to rise up and over a 6000-foot high mountain (shown below). The Initial temperature of the parcel at sea level is 76.5 F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5 F/1000' and

asked by lost on May 28, 2013
83. ## Physical Geography

Assume that a parcel of air is forced to rise up and over a 6000-foot high mountain (shown below). The Initial temperature of the parcel at sea level is 76.5 F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5 F/1000' and

asked by jorge on January 20, 2014
84. ## Science

Assume that a parcel of air is forced to rise up and over a 6000-foot high mountain (shown below). The Initial temperature of the parcel at sea level is 76.5 F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5 F/1000' and

asked by Itzel on October 12, 2014
85. ## Chemistry

Objectives To determine the molecular weight of a volatile liquid. Discussion [This laboratory exercise was adapted from one in Beran and Brady's Laboratory Manual for General Chemistry , John Wiley & Sons, 1982] The Dumas Method for determining the

asked by Veronica on November 27, 2012
86. ## Physics

A fire hose can project water at a rate of 6.00x10^2 litres per minute to a height of 40.0m. Find: a) the velocity with which the water leaves the tube b) the kinetic energy of the water as it leaves the hose c) the kinetic energy of the water at 40.0m.

asked by Jane on August 26, 2012
87. ## Science

2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each

asked by Anonymous on November 24, 2014
88. ## Chemistry

2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each

asked by Anonymous on November 24, 2014
89. ## Microbiology

2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each

asked by Anonymous on November 24, 2014
90. ## APChem

Hi I tried to understand this but I don't know why the answer is B: Which one of the following pairs cannot be mixed together to form a buffer solution: A) NaC2H3O2, HCl B)RbOH, HBr C) NH3, NH4Cl D) H3PO4, KH2PO4 E) KOH, HF The answer is B but could you

asked by Kiki on March 21, 2010
91. ## chemistry hw

SOMEONE PLEASE HELP AND CONFIRM THE RIGHT ANSWER FOR ME...I HAVE ONE MORE ATTEMPT TO THIS PROBLEM AND I NEED HELP!!!!! PLEASE!!!!!!!!!!!!!!!!!!!! THANKS! In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution

asked by Ariel on February 19, 2012
92. ## geometry

Denise poured milk into a glass shaped like a right circular cylinder with a radius of 2 inches. When she added chocolate syrup to the milk, the height of the liquid in the glass increased by 1/2 inch. What was the volume of the chocolate syrup that Denise

asked by Slacker on April 22, 2012
93. ## Physics

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

asked by Angel on October 7, 2010
94. ## Physics

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

asked by Angel on October 7, 2010
95. ## Physics

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

asked by Andrea on October 6, 2010
96. ## Physics

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

asked by Angel on October 7, 2010
97. ## chemistry

Suppose that after measuring the pH of 1.05 M HCl solution, three drops (0.20 mL) of the solution remain behind on the pH electrode. a) When this electrode is then dipped into 100 mL of pure distilled water, show by calculation that the pH of the water is

asked by Nicollette on September 29, 2015
98. ## chemistry

ok im not sure how to do this 15.00ml of acetic acid is pipetted into a flask 0.35 grams of sodium acetate trihydrate is added and mixed then 0.75 of the hydrate is added 1)i assumed that the volume(s) are additions. 15.00ml x .35g *m/1.45g and for the

asked by Jim_R on July 16, 2009
99. ## Physics

The freezing point depression of a .100 m solution of NaCl solution is .34C. Calculate the percent dissociation of NaCl.( Kf for water=1.86) Please help

asked by Sammy on August 27, 2009
100. ## Chemistry

Calculate the final temperature (once the ice has melted) of a mixture made up initially of 75.0 mL liquid water at 29.0 Celsius and 7.0 g ice at 0.0 Celsius?

asked by Briza Brooks on February 24, 2015