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

55,318 results, page 60
1. ## physics

A water slide is constructed so that swimmers, starting from rest at the top of the slide leave the end of the slide traveling horizontally. There is still a height between the surface of the water and the end of the slide. One person hits the water 5.00m

asked by ajo on December 11, 2007
2. ## Honors Biology

In the metric system, what is the relationship between 1 mL of water, 1 g of water, and 1 cm^3 of water?

asked by Emily on August 26, 2008

How many water molecules are in a 1.oo-L bottle of water? The density of water is 1.00 g/mL

asked by Anonymous on November 12, 2008
4. ## Chemistry

Hi there - I'm going to post the question as written in my book. Three 20.0 mL samples of nitric acid are titrated with a 0.200 mol/L solution of sodium hydroxide. The results for the three trials are shown in the table below. What is the concentration of

asked by Dexter on June 5, 2011
5. ## Chemistry

1. Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br− and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may

asked by Mcmaster university on November 30, 2014
6. ## chem

The label on a 1-pint bottle of mineral water lists the following components. If the density is the same as pure water and you drink 5 bottles of water in one day, how many milligrams of each component will you obtain? fluoride 0.08 ppm ppm=mg/kg I just

asked by Anonymous on September 3, 2011
7. ## Chemistry

At –11.0 °C (a common temperature for household freezers), what is the maximum mass of aspartame (C14H18N2O5) you can add to 1.50 kg of pure water and still have the solution freeze? Assume that aspartame is a molecular solid and does not ionize when it

asked by Anon on January 29, 2013
8. ## physics

An electric heater used to boil small amounts of water consists of a 25-Ω coil that is immersed directly in the water. It operates from a 60-V socket. How much time is required for this heater to raise the temperature of 0.50 kg of water from 29° C to

asked by Dee on January 27, 2014
9. ## Physics

An object of mass 7.0 kg falls through a height of 47.0 meters and, by means of a mechanical linkage, rotates a paddle wheel that stirs 0.670 kg of water. The water is initially at 5.5 deg C, What is the maximun possible temperature of the water? (Answer

asked by Josh G, on March 21, 2008
10. ## Geometry

If a rotating water sprinkler is set so 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? Round to the nearest tenth 533.3ft?

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

The water used in many fountains is recycled. For instance, a singel water particle in a fountain travels through an 85 m system and then returns to the same point. What is the displacement of a water particle during one cycle? I don't know where to start.

asked by Corin on September 23, 2007
12. ## bctc

A tank of water in the shape of an inverted cone is being filled with water at rate of 12m^3/min. the base radius of tank is 26 meters and the height of the tank is 8 meters. at what rate is the depth of the water in the tank changing when the rains os the

asked by alaeddin on October 22, 2016
13. ## sCIENCE PLZZZZZZZZ HELP

1. The surface tension in a cup of water is caused by ____. (1 point)attractive forces between the water and its container attractive forces between water molecules adhesive forces between water molecules adhesive forces between the water and its container

asked by jhai9 on April 11, 2012
14. ## Science

1. The surface tension in a cup of water is caused by ____. (1 point)attractive forces between the water and its container attractive forces between water molecules adhesive forces between water molecules adhesive forces between the water and its container

asked by jhai9 on April 11, 2012
15. ## physics

You see some management students getting drunk at 1 PM in the quad. (Yes, this is an early wake up call for them.) You decide to tie a 2.00 daN water balloon on the end of a 1.00 m long light rope and start swinging it horizontally. The rope from your hand

asked by BOB on March 22, 2016
16. ## algebra

moonshine has 50 liters of a 70% alcohol solution.how many liters of pure alcohol must be added to obtain an 80% alcohol solution? The alcohol content is .7*50=35 liters. Then, adding alcohol... 35+V=.80*(50+V) solve for V, volume alcohol added

asked by anonymous on June 8, 2007
17. ## Chemistry - DrBob PLEASE

A glass of ice water was made by adding six 25 g ice cubes to one liter of water. If the water was initially 25C and the ice cubes were initially at -15C, what is the final temperature of the ice water? (I don't know how to get it.)

asked by Jessica on May 23, 2011
18. ## chemistry

Which of the following statements is false ? a) S is negative when water condenses at 100oC b) Ssurroundings is positive when water condenses at 100oC c) Suniverse is equal to zero when water condenses at 990C d) Suniverse increases when water

asked by Mi on February 5, 2017
19. ## chemistry

Surface tension explains which of the follow- ing phenomena? I) A piece of aluminum foil floating on a lake II) A bowling ball sinking more slowly through molasses than through water III) Separating ethanol from water by distillation IV) Water beading on a

asked by Bob on November 14, 2010
20. ## Science

Janice found two sea shells when she went to the beach. They appear to be almost the same size, but they have different shapes. How could she figure out if their volume is the same? A)Weigh each one on a scale to see which is heaviest. B)Fill each one with

21. ## Science

Janice found two sea shells when she went to the beach. They appear to be almost the same size, but they have different shapes. How could she figure out if their volume is the same? A)Weigh each one on a scale to see which is heaviest. B)Fill each one with

22. ## algebra

if you can buy 2 pair of pants and 1 shirt for 79.85\$ before tax is added and 1 pair of pants and 2 shirts for 69.85\$ before tax is added , how much does a shirt cost ?

asked by juice on June 16, 2010
23. ## Chemistry- Drbob-help#3

I still need help with #3 I'm not sure how I got 1.14M. I have tried to do the problem over, but I not coming up with my original answer of 1.14M. Somehow I am missing a step. Please show work for the 1.14M Thanks Question#9 reads exactly as written. A

asked by Paul on February 10, 2011
24. ## chem

At hihg temperatures Sodium chlorate decomposes to form Sodium Chloride and Oxygen gas. A 0.8765 gram sample of sodium chlorate was heated until the reaction ended when Oxygen gas production was ceased. The Oxygen gas collected over water occupied 57.2 ml

asked by Anonymous on March 16, 2008
25. ## Physic

The spout heights in the container in the figure are 15 cm, 30 cm, 45 cm, and 60 cm. The water level is maintained at a 68 cm height by an outside supply. What is the speed of the water out of the 15 cm high hole? What is the speed of the water out of the

asked by Bret on May 7, 2011
26. ## chemistry

2. Imagine you have two beakers. Both beakers are filled with the same amount of water. The water in both beakers is the same temperature as well. You add 50 g of Substance A to the first beaker, and 50 g of Substance B to the second beaker. After stirring

asked by fatima on October 22, 2009
27. ## chem!

A common flaw in calorimetry experiments to determine the molar enthalpy of solution is to have a mass of solute that is inappropriate for the volume of water used resulting in a temperature change that is too small or too large. A temperature change of

asked by bob on April 14, 2007
28. ## chemistry

A domestic cleanser contains concentrated HCl as the active ingredient. A titration experiment was carried out to determine the concentration of HCl in the domestic cleanser. 20.0 ml of the cleanser were diluted to 250.0 ml with distilled water. 25.0 ml of

asked by henry39 on December 24, 2016
29. ## Chemistry

(ii) between 0 and 100.0 mL NaOH added H2A H2O HA - Na+ A2- OH - (iii) 100.0 mL NaOH added H2A H2O HA - Na+ A2- OH - (iv) between 100.0 mL and 200.0 mL NaOH added H2A H2O HA - Na+ A2- OH - (v) 200.0 mL NaOH added H2A H2O HA - Na+ A2- OH - (vi) after 200.0

asked by Franklin on March 8, 2013
30. ## physics

A physicist, upon awaking one morning to find his stove out of order, decides to boil the water for his wife's coffee by shaking it in a thermos flask. Suppose that he uses 520 cm3 of tap water at 56oF, that the water falls 1.35 ft each shake, and that the

asked by lizzy on April 23, 2008
31. ## chem

A sewage cleanser contains concentrated hydrochloric acid (HCl) as the active ingredient. A titration experiment was carried out to determine the concentration of hydrochloric acid in the domestic cleanser. 25.0 mL of the cleanser were diluted to 250.0 mL

asked by raiser on October 13, 2016
32. ## chemistry

What mass of CaCl2(s) must be dissolved in pure water at 10 degrees celsius to make a 26.3 mL solution and to increase the solution temperature to 16.4 degrees celcius? assume solution has same physical properties as water. deltaH of solution = -82.8

asked by Anonymous on November 17, 2008
33. ## Science

A boat has a speed of 15ms-1 in still water. It is used to cross a river 500m wide along which there is a strong current of 0.9ms-1. The boat is being directed to the opposite bank, but is carried downstream. Calculate: a) The boat velocity relative to the

asked by Essex on October 15, 2014
34. ## Mechanics

A boat has a speed of 15ms-1 in still water. It is used to cross a river 500m wide along which there is a strong current of 0.9ms-1. The boat is being directed to the opposite bank, but is carried downstream. Calculate: a) The boat velocity relative to the

asked by Essex on October 15, 2014
35. ## Math

If a water bottle holds 1.5 litters of water if I open a new bottle an drink half how much water is left

asked by D on January 26, 2017
36. ## physics

a 2.00 kg rock is dropped from a bridge to the water 50.0m below. what is the velocity as it hits the water? what is its kinetic energy as it hits the water?

asked by hannah on August 1, 2013
37. ## Math

The pool is partially filled with water. The volume of the water in the pool is 45 cubic feet. How deep is the water? A.0.5 ft B.1.5 ft C.2.5 ft** D.3.5 ft Am I right?

asked by Ben on March 7, 2016
38. ## science

andy mixed 40 ml of water at 15 degress celius with 40 ml of water at 65 degrees celius ..... what is the final temperature of the water.?? H E L P !

asked by Alexius on December 31, 2010
39. ## Physics

Please help! suppose you have some 20 degrees celsius water and some boiling water. How much of each would you use to make 4 kilograms of water at 45 degrees celsuis?

asked by Amanda on March 1, 2011
40. ## MATH

The pool is partially filled with water. The volume of the water in the pool is 45 cubic feet. How deep is the water? A.) 0.5 ft B.) 1.5 ft ** C.) 2.5 ft D.) 3.5 ft

asked by WOW on May 12, 2017
41. ## As physics

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Two copper wires of diameter 1 mm and 2

asked by cylinder on December 12, 2017
42. ## Chemistry

In an experiment, a mixture of two gases occupies a volume of 3.00 L at a temperature of 22.5 degree centigrade. The mixture contains 14.0 g of water, 11.5 g of oxygen, and 37.3 g of nitrogen. Calculate the total pressure and the partial pressure of each

asked by Aaqib Zaman on November 15, 2014
43. ## Chemistry

What would be the steps to solving this problem? The aluminum sulfate hydrate [Al2(SO4)3 (times) xH2O] contains 8.20 % Al by mass. Calculate x, that is , the number of water molecules associated with each Al2(SO4)3 unit.

asked by Amy~ on August 26, 2010
44. ## Chemistry

8.1g of XSO4.7H2O crystal when heated at 90degree for 15 minutes gave 6.9g of the salt,which gave 4.9g when heated further at 120degree. If X is 72. Calculate the amount of water of crystallization in the intermediate and final salts. [X=72,S=32,O=16,H=1]

asked by Banko on December 1, 2016
45. ## Chemistry

A buret (initial and final buret reading were 2.20 mL and 11.86 mL) was used to deliver a sample of 2.1E-5 M stock dye into a 25.0 mL volumetric flask. The dye was then diluted with water to exactly 25.0 mL. Calculate the molarity of the resulting

asked by Mallory on October 26, 2010
46. ## Chemistry

When a 8.00 g of KBr is dissolved in water in a calorimeter that has a total heat capacity of 4.6 kJ·K^-1 the temperature decrases by 0.290 K. Calculate the molar heat of solution of KBr in kJ/mol. DeltaH soln = ?

asked by Eric on February 8, 2012
47. ## chemistry

the Ksp for CaF2 is 3.9*10-11. assuming that calcium flouride dissociates completely upon dissolving and that there are no other important equilibria affecting the solubility, calculate the solubility in pure water, of calcium floride in m/L and in g/L

asked by anon on October 10, 2010
48. ## chemistry

when 1.00 g of stearic acid ( a saturated fatty acid) is dissolved in water, then diluted to exctly 10.00 ml, the PH of the resulting solution is 2.73.the fornula weight of steric acid is 284.5. calculate ka and pka for this acid

asked by saud on December 3, 2011
49. ## Mathematical literacy

Assume there are 4 people living in the house nd their daily average consumption is 25litres per person per day nd there are 30days in a month . Calculate the average monthly water consumption for the household.

asked by Lizzy on March 3, 2015

I did an experiment to study the effects of changes in conditions on an equilibrium system. The first system was the dissociation of acetic acid. HC2H3O2 -> H^+^ + C2H3O2^-^

asked by Hannah on March 14, 2012
51. ## Chemistry

I need to duplicate the strength of lye made from wood ash dissolved in water (Potassium Hydroxide) to that of lye made from Sodium Hydroxide disolved in water. The soap recipes I use require lye of various strengths as determined by fluid volume of water

asked by Jeff on February 28, 2011
52. ## Math

How do I figure the ratio of one part liquid to eighteen parts water if I am using four gallons of water? Isn't the water liquid also? So all eighteen parts are liquid. 17 parts water= 17/18*4gal= 17/18*16quarts= ... 1 part solute= 1/18*16 quarts= 3.5 cups

asked by Greg on July 21, 2007
53. ## Physics Question

Here is a demonstration Pascal used to show the importance of a fluid's pressure on the fluid's depth : An oak barrel with a lid of area 0.17 m^2 is filled with water. Along, thin tube of cross-sectional area 4.7×10−5 m^2 is inserted into a hole at the

asked by Catherine on May 7, 2011
54. ## help plz

A flower arrangement was marked down 12.5%. If the flowers originally cost \$20, what is the amount of the discount? \$2.40 \$2.50 \$2.05 \$17.50 Find the amount of tip on a \$75 bill if a 15% tip is left. \$11.25 \$11.20 \$10.50 \$12.00 What is the final price for

asked by shynice on February 3, 2016
55. ## Physics

James joule measures temperature of the water at the top and bottom of the waterfalls. If one of these waterfalls is 55m high, and all gravitation energy of the water is at the top of the falls. What temperature difference would be between the water at the

asked by Sam on November 25, 2013
56. ## Physics

James joule measures temperature of the water at the top and bottom of the waterfalls. If one of these waterfalls is 55m high, and all gravitation energy of the water is at the top of the falls. What temperature difference would be between the water at the

asked by Sam on November 25, 2013
57. ## Chemistry

Does anyone know why amines show high solidility in water? Could my answer be: Amines exhibit high solubility in water because they form bonds with the water thanks to the hydorgen bonds, but large amines are not soluble in water since the effect of this

asked by Lisa on February 18, 2008
58. ## waste water treatment

Wastewater from a small town is treated in a trickling filter which is preceeded by a screen, sand-removal and primary clarification. The maximum hydraulic capacity, or peak flow, of the treatment plant is 1,500 m3/h. The dry weather flow (Qdwf) amounts

asked by Nilu on November 25, 2013
59. ## physics... part a on

A diver descends from a salvage ship to the ocean floor at a depth of 35 m below the surface. The density of ocean water is 1.025x10^3 kg/m^3. a) Calculate the guage pressure on the diver on the ocean floor. b) Calculate the absolute pressure on the diver

asked by johnny on January 21, 2007
60. ## Chemistry

A student was given 100mL of HCL solution in a 250mL beaker and told that the HCL was 0.11M. The student was also given phenolphthalein indicator and 250 ML of 0.1234 M NaOH. The student first filled a buret with NaOH solution. The student then placed an

asked by Lenny on November 21, 2013
61. ## Chemistry again

Chromium is ametal that is added to steel to improve its resitance to corrosion. Calculate both the number of miles in a sample of Cr containing 5.00 x 10^20 atms and the mass of the sample. Ok this is how I worked it. 1 mole of Cr = 51.996g = 6.022 x

asked by Chopsticks on January 6, 2009
62. ## GEN MATH

Solve the ff. problems. Present a complete and systematic solution. 1.) A number added to twice its reciprocal is equal to 11/3. WHat is the number? 2.) The ratio of ten more than three times a number to the square of the same number is equal to 1. What is

asked by lab on July 31, 2016
63. ## chemistry

I wonder how to calculate the Kp if the question gives us the total pressure and no of mol of reactant. Without giving the mol of product how can i calculate the Kp. Can anybody help me what to do to calculate the Kp. Here is the question im unable to

asked by elly on September 19, 2015
64. ## Help1

WHY rational expressions that are being added must have an LCD, but rational expressions that are being multiplied do not need to have an LCD. The short answer is that addition and multiplication are different operations with different properties. If we

asked by Allen on October 13, 2006
65. ## physcial science

As water freezes, its temperature does what? a) increase b) decrease c) first increase, then decrease d) does not change The temperature of freezing water is 0o C. The temperature of the water will remain at zero C until all of the water has frozen;

asked by dora on June 22, 2007
66. ## math

A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter. 3x-4+7x+10= 3x+7x=10x −4+10= 14 10x+14 that is my answer please help You just added two sides, a rectangle has four sides. So the perimeter should be twice

asked by susie on June 29, 2007
67. ## St.george high school

The numerator of a fraction is 8 less than the denominator.when 6 is added to the numerator and 10 is added to the denominator,the value of the fraction is unchanged.find the original fraction.

asked by Lynn on November 4, 2012
68. ## SCIENCE

Provide at least three freshwater and three ocean water resource challenges by filling in the following table. freshwater = aquifer depletion, overdrawing surface water, and saltwater intrusion oceanwater = flooding, water pollution, and eutrophication can

asked by scooby9132002 on September 12, 2008
69. ## Chemistry

a 191 g piece of copper is heated to 100 C in a boiling water bath and then dropped into a beaker containing 755 g of water (density =1.00 g/cm3) at 4.0 C. What is the final temperature of the copper and water after thermal equilibrium is reached?

asked by Logan on October 15, 2014
70. ## water dynamics

a projectile 20ft in lentgh 4-6 thousand lbs traveling @ 100mph @ 100ft below water surface can be stopped and/or have said projectile change its course by using how many pounds of water preasuure to achieve goal? And what are the approximate dimensions of

asked by mike on February 11, 2015
71. ## Algebra II

A geyser sends a blast of boiling water high into the air. During the eruption, the height (h) (in feet) of the water (t)seconds after being forced out from the ground could be modeled by h = -16t*t + 70t. My question is how do you find the initial

72. ## Science

Miguel is skipping rocks across the surface of a lake. After he throws it, each stone goes through the following motions: I. the stone moves toward the water II. the stone hits the surface of the water and bounces off III. gravity pulls the stone back

asked by Lovely Mallory on March 20, 2013
73. ## Chem.

Sorry if I confused you. I miss-wrote my question. My question was: How can I determine the concentration of HCl remaining in the flask. I calculated the # of moles of HCl neutralized by the tablet which was around 0.014 M. I don't understand the steps

asked by Help!! on July 7, 2015
74. ## trig problem

Hi, A fountain in a shopping centre has a single jet of water. The height of the jet of water varies according to a sinusoidal function. A student notes that, in exactly one minute, the jet goes from a minimum height of 2m to a maximum height of 6m and

asked by Anonymous on April 28, 2012
75. ## Application prob. for Trig.

Hi, A fountain in a shopping centre has a single jet of water. The height of the jet of water varies according to a sinusoidal function. A student notes that, in exactly one minute, the jet goes from a minimum height of 2m to a maximum height of 6m and

asked by Anonymous on April 30, 2012
76. ## Chemistry

heptane and water do not mix, and heptane has a lower density (0.684g/mL) than water (1.00g/mL). A 100mL graduate cylinder with an inside diameter of 3.10 cm contains 39.90g of heptane and 34.00g of water. What is the combined height of the two liquid

asked by Tiffany on January 21, 2012
77. ## physics

A 61.7 kg person jumps from rest off a 2.98 m-high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.19 m under the surface of the water. Determine the magnitude of the average force that the water exerts on

asked by nick on February 20, 2012
78. ## psychology

* Fill 3 medium-sized bowls as follows: o Bowl 1 - with very hot (but not painfully hot) tap water o Bowl 2 - with very cold tap water o Bowl 3 - with a mixture of the very hot and very cold water. * Arrange them, so your right hand is in front of the cold

asked by ingrid on March 30, 2010
79. ## Physics

i41 tinypic com/2qna74k png (add the periods) For the vectors in the figure, with a = 6.4, b = 2.5 and c = 6.87. Calculate a(dot)b calculate a(dot)c calculate b(dot)c I got 0 for a(dot)b but the same method (ac*cos(theta)) does not work for the other two,

asked by John brown on January 26, 2016
80. ## Chemistry

I had to perform an experiment for the freezing point depression in which we had to determine the frezzing points of water as a pure solvent, sodium chloride, sucrose, and ethylene glycol. We had to work with a partner so I completed the experiment for

asked by Hannah on February 20, 2012
81. ## water?

what steps can we take to decrease our water consumption? Thank you for using the Jiskha Homework Help Forum. First of all, look around your own home to see what you can do. Instead of sprinkling a lawn for hours, use a timer that sets it for every third

asked by Anonymous on October 26, 2006
82. ## Physics

You are standing on a 50m cliff and throw a ball upwards at 8.2m/s - calculate the maximum height the ball will reach - calculate the time it will take the ball to return where it started - calculate the speed of the ball when it hits the ground. Please

asked by Jay on September 14, 2015
83. ## 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 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by JSJFJF on February 19, 2012
84. ## Chemistry

I want to see if i got my answer correct for #1 but I need help on #2 1.A 150g aluminum pan containing 500g of water is heated on a stove for 5 minutes. The temperature goes from 23.5C to 48.9C. How much heat was absorbed. (s for Al is .900j/g C, s for H2O

asked by Ashley on March 8, 2011
85. ## Chem

I want to see if i got my answer correct for #1 but I need help on #2 1.A 150g aluminum pan containing 500g of water is heated on a stove for 5 minutes. The temperature goes from 23.5C to 48.9C. How much heat was absorbed. (s for Al is .900j/g C, s for H2O

asked by Ashley on March 8, 2011
86. ## Physics

The pressure-volume graph shows an engine cycle where the working substance is an ideal monatomic gas (γ = 5/3). The process A-B is adiabatic. At point A, the pressure is 2.70×105 Pa and the volume is 0.0180 m3. At point B, the volume is 0.0450 m3.

asked by Jamie on June 25, 2012
87. ## chemistry

Got my as chemistry practical next week on OCR. Really stuck on it, don't know how to work out how the expected volume of CO2 is greater than that is obtained. Looked at the mark scheme ocr chemistry evalutative task specimen , but its not much help as it

asked by anonymous on March 31, 2012
88. ## Chemistry!

A sealed flask contains 0.60 g of water at 28 degrees celcius. The vapor pressure of water at this temperature is 28.36 mmHg. What is the minimum volume of the flask in order that no liquid water be present in the flask?

asked by BillNyeTheScienceGuy on December 6, 2010
89. ## chemistry

What is the specific heat of an object that weighs 25 g and when heated to a temp of 500K and dropped into 100mL of water changes the temp of the water from room temp (293K) to 306K? Cp of water= 4.184

asked by Halle Jensen on February 23, 2015
90. ## physics

A hollow steel buoy in thee form of a sphere of radius 0.5m is fixed by a wire to the base of a river. If the mass of the buoy is 20kg, calculate the tension in the cable. (Take density of water=1000 kilograms per cubic meter).

asked by Hilder on August 15, 2013
91. ## Chemistry

I'm clueless on this take-home quiz we have. Calculate the concentration of (Co3)2- in a solution made by dissolving 1 mole of Co2 in 1 L of water. The hydration equilibrium constant Kh of Co2 at 25C is 1.70x10-3, Ka1 of H2CO3=2.5x10^-4, and

asked by Clarissa on November 23, 2008
92. ## Physics

Force F causes displacement d of a 20-Kg object starting from rest along a frictionless path. F= 10 N i + 50 N j + 15 N k and d= 10 m i + 60 m k A) Calculate the work done by the force. B) Calculate the angle between the vectors F and d. C) Calculate the

asked by Sandhya on April 22, 2009
93. ## SCIENCE

Some student made a terratium out ot the bottom of 2-liter soda bottle.They placeed a layer of gravel on the botton of the bottom of the and the added soil.they sprinkled 1/2 teaspoon of grass seed on top of the soil and added two small plants.Finally they

asked by PRECILIA on September 10, 2009
94. ## scince

When a body hanging from a spring balance is immersed in water it floats just below the surface of water and shows 100 g loss in its weight (i) What is the weight of the body in water? (ii) What is the weight of the body in air? (iii) What is the upthrust

asked by upendra on November 29, 2015
95. ## science

A 25mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added until the indicator changed colour. It was found that 28mL of the alkali was used. What colour was the solution in the

asked by Stanley on October 22, 2014
96. ## chemistry

Why if you dissolve cobalt chloride solution in distilled water and then pour acetone in it, the bottom part of the graduated cylinder is red and the top part is blue? What do you mean by it has one color with water of crystallization? CoCl2*6H2O is a

asked by Lydia on April 11, 2007
97. ## Science

If I want to make a solution that has a 5% concentration of salt, is it correct for me to have 380mL water and 20g salt? My method behind this was that I wanted a 400g solution, and so since 1mL water is equal to 1g water, I did: 400x0.95=380g water or

asked by Anonymous on February 6, 2011
98. ## science

The volume of a 500 g sealed packet is 350 cm cube . Will the packet float or sink in water if density of water is 1 g cm raised to -3 ? What will be the mass of water displaced by this packet ?

asked by ujjval on October 11, 2012
99. ## Controls

If you have a tank of water at sea level and the temperature of the water in the tank is 110 degrees F, what is the height of the water if the pressure at the bottom of the tank is 95 inches of mercury(absolute)

asked by Kelsey on January 31, 2011
100. ## physics

A water-cooled engine produces 1589 W of power. Water enters the engine block at 14.61 °C and exits at 29.91 °C. The rate of water flow is 147.3 L/h. What is the engine’s efficiency?

asked by melisa on January 6, 2012