1. chemistry

    A 1.11 M solution of fluoroacetic acid, FCH2CO2H, is 5% dissociated in water. Calculate the value of the pKa of FCH2CO2H. pKa: ?? I dn't even know how to strt with this

    asked by WIll on August 26, 2014
  2. Chemistry Acid Question Ka

    Enough of a monoprotic acid is dissolved in water to produce a 0.0165 M solution. The pH of the resulting solution is 2.38. Calculate the Ka for the acid.

    asked by RZeal on April 23, 2012
  3. MATH

    Calculate the amount of 8% acetic acid needed to combine with water to make 600 ml of 3.5% acetic acid.

    asked by Brittany on July 6, 2012
  4. physics

    The Speed By Which A Sound Travels In A Water Of Depth 300m,is 216km/h.Calculate The Time Taken By The Sound At That Depth.

    asked by oketunde olalekan on February 23, 2015
  5. math

    can someone check my work please? 1. Seven times a number, added to the sum of the number and eight. 7*x+8 2. A number multiplied by -7 less 11 X*(-7)-11 3. A number multiplied by 9, added to -8 X*9+(-8) 4. 8.7 less than a number 8.7-x 5. The sum of a

    asked by Abby on September 16, 2015
  6. Chemistry-is this right?

    Water has a pH of 4.9? Calculate H3O and OH 1. H3O= 10^4.9=1.25*10^-5 2. OH= 14- 4.9= 9.1

    asked by Clare on April 30, 2015
  7. English

    1. An apple floats on water. 2. A coin sinks in water. 3. Banana peels are yellow. 4. The cell phone vibrates. 5, One apple floats on water. 6. One coin sinks in water. 7. Any apple floats on water. 8. Any coin sinks in water. 9. The banana peel is yellow.

    asked by rfvv on October 11, 2017
  8. Chemistry

    You have two sealed jars of water at the same temperature. In the first jar there is a large amount of water. In the second jar there is a small amount of water. how does the vapor pressure of water in the first jar compares with the vapor pressure of

    asked by Ciaria on March 11, 2015
  9. Chemistry help please

    You have two sealed jars of water at the same temperature. In the first jar there is a large amount of water. In the second jar there is a small amount of water. how the vapor pressure of water in the first jar compares with the vapor pressure of water in

    asked by Ciaria on March 12, 2015
  10. physics

    In lab, Will burns a 0.6 g peanut beneath 48 g of water, which increases in temperature from 22 degree C to 55 degree C. The amount of heat absorbed by the water can be found with the equation Q =cm \Delta T, where Q is the amount of heat, c the specific

    asked by christy on April 3, 2012
  11. chemistry

    A solution contains 0.245 of dissolved lead (lead ion or Pb2+.) How many moles of sodium chloride must be added to the solution to completely precipitate all of the dissolved lead? What mass of sodium chloride must be added?

    asked by amy on October 12, 2010
  12. PHYSICS

    Water flowing out of a horizontal pipe emerges through a nozzle. The radius of the pipe is 1.5 cm, and the radius of the nozzle is 0.42 cm. The speed of the water in the pipe is 0.68 m/s. Treat the water as an ideal fluid, and determine the absolute

    asked by Anonymous on November 18, 2015
  13. physics

    a steel has a steel lid that is stuck tightly to the can. is it possible to open the can by running it under hot water? 1. yes 2. no 3. yes but only if the bottom of the can is submerged in ice water while the top is run by hot water. 4. no but could open

    asked by HELP!!!! on April 30, 2011
  14. physics

    Which of the following is true for popcorn kernels and the water molecules inside them during popping? a. The temperature of the kernels increases. b. The water molecules are destroyed. c. The kinetic energy of the water molecules increases. d. The mass of

    asked by ihatephysicsgah on March 28, 2012
  15. Chemistry

    UMM.. I keep coming up with the wrong answer? How do I calculate this? 1. Calculate the number of Li atoms in 9.9 moles of Li. Express your answer using two significant figures. 2. Calculate the number of CO2 molecules in 3.13×10−2 mole of CO2.

    asked by Jennie on February 28, 2015
  16. 7th Grade Science

    Write a short essay in which you create an analogy to describe particle motion. Compare the movements and positions of people dancing with the motions of water molecules in liquid water and in water vapor. I am NOT asking anybody to do this for me, all I

    asked by completeidiot on September 5, 2012
  17. Physics

    The drawing below shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the water. Suppose he enters the water at a

    asked by Steven on October 3, 2014
  18. physics

    The drawing below shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the water. Suppose he enters the water at a

    asked by A on February 22, 2013
  19. Physics

    The drawing below shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the water. Suppose he enters the water at a

    asked by Steven on October 3, 2014
  20. math

    Water is Pumped into an underground tank at a constant rate of 8 gallons per minute.Water leaks out of the tank at the rate of (t+1)^½ gallons per minute, for 0

    asked by POD on April 30, 2008
  21. Chemistry

    Imagine that your water heater has broken, but you want to take a bath. You fill your bathtub with 25kg of room-temperature water (about 25C). You figure that you can boil water on the stove and pour it into the bath to raise the temperature. How much

    asked by Anonymous on February 17, 2010
  22. AP Chemistry

    To prepare 1.000 kg of 5.5 percent by mass KCl (aq), one may dissolve a. 994.5 g KCl in 5.5 g of water b. 5.5 g KCl in 994.5 g of water c. 5.5 g KCl in 1000.0 g of water d. 55 g KCl in 945 g of water e. 55.0 g KCl in 1000.0 g of water

    asked by Joe on April 4, 2008
  23. Physics

    Since moment of inertia is a scalar quantity, a compound object made up of several objects joined together has a moment of inertia which is the scalar sum of the individual moments of inertia. A) A wooden cylinder has mass m and radius R. To be used as a

    asked by Anonymous on October 26, 2016
  24. Fluid Mechanics

    An ideal mixing (total volume inlet = total volume outlet) of two incompressible fluids which is between water and methanol (SG =0.85) is coming from two inlets. At inlet 1, water enter at 9 m/s and at inlet 2, methanol enter at 7 m/s. The diameter of

    asked by Farah on November 1, 2014
  25. Fluid Mechanics

    Calculate the pressure at a point 5 m below the free water surface in a liquid that has a variable density given by equation o =(350+Ay)kg/m3, where A = 8 kg/m4 and y is the distance in meters measured from the free surface.

    asked by Urgent on September 9, 2012
  26. Chemistry

    At 20 degree celsius, Ka for an unknown monoprotic weak acid is 0.00088. Calculate the Delta G (in kJ/mol) for the reaction of this unknown acid with water. HA(aq) + H2O(l) H3O+(aq) + A-(aq)

    asked by Chloe on April 30, 2013
  27. chemistry

    Calculate the theoretical percentage of water in gypsum, rounded to the nearest whole number %. (calcium sulfate dihydrate; CaSO4 ° 2H2O; Ca = 40 g/mol, S= 32 g/mol; O= 16 g/mol; H= 1 g/mol).

    asked by tina on February 7, 2013
  28. Chemistry

    Argon makes up 0.93% by volume of air. Calculate its solubility in water a 20 C and 1.0 atm. The henry's law constant for argon under these conditions is 0.0015 mol/L*atm

    asked by guy on December 9, 2014
  29. chemistry

    Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 13.9 mL of

    asked by samm on November 24, 2013
  30. science

    A ray of light travelling in air strikes the water surface at an Angle of 30 degree calculate the Angle of light refraction if refractive index of glass is 1.5

    asked by vikas on March 9, 2017
  31. Physics

    A 0.255 kg ball was thrown vertically upward from a bridge 10.3 meters above the ground with an initial velocity if 31.7 meters/second. Calculate the balls velocity when it hits the water.

    asked by Billy johnson on February 18, 2013
  32. chemistry

    Calculate the solubility of in water at a partial pressure of of 140. torr at 25°C. The Henry's law constant for is for Henry's law in the form C = kP, where C is the gas concentration (mol/L).

    asked by Amber on October 5, 2016
  33. physics

    an heating coil of R=100ohm is connected to 220v supply. calculate time taken if the coil heats 1kg of water from 25degree Celsius to 50degree Celsius

    asked by sridhar on August 3, 2014
  34. Chem

    You've just prepared a solution by transferring 20.0 g of glucose into a 1.0 - L volumetric flask, and adding water to the mark. Calculate the concentration of the glucose solution in terms of millimoles/Liter, mg/mL, and % (m/v).

    asked by Britt on September 2, 2009
  35. chemistry

    A sample of potassium hydrogen oxalate, KHC2O4, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.

    asked by mary on April 27, 2015
  36. Chemistry

    Calculate the concentration (% W/V) of NaCl solution that was made by dissolving 15.0 g of sodium chloride in enough water to make 300.0 mL of solution. Okay the answer is 5.00%....however I keep getting 0.0500%....Why? and which one is the correct answer?

    asked by Chemistry Chick on October 29, 2011
  37. chem

    Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Q=M*C*delta T 65g*4.184*(65-32) 89.7 J

    asked by jb on January 31, 2016
  38. chem

    A sample of potassium hydrogen oxalate, KHC204, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.

    asked by amanda78 on November 21, 2012
  39. chemistry

    an aqueous solution containing 17.5g of an unknown molecular(nonelectrolyte) compound in 100.0g of water has a freezing point of 1.8 degress C. calculate the molar mass of the unknown compound

    asked by Monique on November 5, 2011
  40. Heat of Formation

    When 10.00 g of iron is burned in O2(g)to form Fe3O4 (s) , enough heat is generated to raise the temperature of 784 g of water from 18.0 C to 38.0 C. Calculate the heat of formation of Fe3O4 (s) under these conditions in kJ/mol.

    asked by Kyle on November 6, 2009
  41. Chemistry

    Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 13.9 mL of

    asked by Anonymous on November 22, 2011
  42. chemistry

    Given a saturated solution of 25 drops of Ca(OH)2 in water that requires 34 drops of 0.0050 M HCl to titrate to the endpoint, calculate [OH-] and [Ca2+]. An ICE table will help you relate [OH-] to [Ca2+].

    asked by Cassie on April 17, 2012
  43. Chemistry

    Calculate the density of an unknown sample of metal given that a 2.3504 gram sample of metal causes the water level in a graduated cylinder to rise from 33.5 ml to 35.2 ml. Show work

    asked by josh on September 1, 2015
  44. Math

    A hemispherical tank has a diameter 10cm is fixed by water issuing from a pipe of radius 20cm at 2m per second. Calculate currently to 3.s.f the time in mind Tessa it take to fixed the tank.

    asked by Sam on October 27, 2016
  45. Physics 11th Grade "HEAT' 2

    1) Emily is testing her baby's bath water and finds that is too cold,so she adds some hot water from kettle on the stove. If Emily adds 2.00 kg of water at 80.0 degree celcius to 20.0 kg of bath water at 27.0 degree celcius , what is the final temperature

    asked by Isis on March 14, 2013
  46. macro econ

    Need help if bridget has wine and cheese. 4 bottle of wine at 10.00 and 4lbs of chesse 4.00. The last bottle of wine added 50 units to bridgt utility, while the last pound of cheese added 40 units. Is bridget makeing the utility maximaizing choice if so

    asked by joy on November 29, 2009
  47. WORD PROBLEMS UGH

    1) A party mi is made from pretzels that cost $2 lb. and cereal that costs $2.40 lb. If a total of 4 pounds is made and the cost for the mix is $2.15 a pound, how many pounds of each ingredient are used? 2) When the tens digit of a two digit number is

    asked by andra on May 7, 2014
  48. chemistry

    Calculate the value of the [Fe3+]/[Fe2+] if 3 cm3 of the 0.05 M Fe3+ solution is added to 25 cm3 of the 0.05 M Fe2+ solution

    asked by ronika kumar on September 23, 2015
  49. Physics

    A water tank is filled to a depth of 10 m, and the bottom of the tank is 20 m above ground. A water-filled hose that is 2.0 cm in diameter extends from the bottom of the tank to the ground, but no water is flowing in this hose. The water pressure at ground

    asked by Anonymous on November 22, 2014
  50. chemistry

    Methanol is manufactured by the below catalyzed reation using ZnO/Chromate. CO + 2H2 --> CH3OH deltaH -91kJ Does the amount of methanol increase, decrease, or remain the same when an equilibrium mixture of reactants and products is subjected to the

    asked by Anna on April 23, 2010
  51. math - surface area and volume

    A cylindrical bucket with base 15 cm with water upto a height of 20 cm a heavy iron spherical ball of radius 9cm is drop into the bucket to submerge completely in the water. Find the incrrase in the level of water.

    asked by s.yashraj on February 1, 2016
  52. chemistry

    water has a molar mass weight of 18 grams that's 18 grams per mole you drink a 2 liter bottle of water everyday and you are such a smarty that you you know that 1mlof h2o weighs 1 gram can you tell me how many moles of water you consume a day

    asked by Anonymous on November 5, 2010
  53. Calculus(answer needed immediatly,thanks)

    A paper cup has the shape of a cone with height 8cm and radius 3cm at the top. Water is being poured into the cup at the rate of 2cm3/s. How fast is the water level rising when the water is 6cm deep?

    asked by Mehak on March 13, 2011
  54. calculus

    A trough is 16 ft long and its ends have the shape of isosceles triangles that are 5 ft across at the top and have a height of 1 ft. If the trough is being filled with water at a rate of 11 ft3/min, how fast is the water level rising when the water is 7

    asked by Jack on October 13, 2011
  55. physics

    If 335 g of water at 65.5 °C loses 9750 J of heat, what is the final temperature of the water? Liquid water has a specific heat of 4.18 J/(g.°C). °C (Answer a number only, no units. Round to the tenth place). This is an example of an endothermic or

    asked by sara on May 22, 2017
  56. Math

    If a cubic foot of water weighs approximately 62.5 pounds, find the weight of the water in a swimming pool which is 16 yards long and 12 yards wide with water to a depth of 7 feet. Answer to the nearest ton.

    asked by Jon on August 23, 2010
  57. Chemistry

    A flask was immersed in 350 g of water at 25 degrees C. Steam at 100 degrees C was passed into this flask, and eventually condensed into water at 100 degrees C. If the temperature of the water surrounding the flask was raised to 70 degrees C, how many

    asked by Amanda on April 19, 2014
  58. math

    1 litre of coffee at 80oC need to be cooled to 40oC. Assuming that all the ice melts and no heat is lost to the environment. Take the specific heat capacity of coffee to be 4200J/kgK, density of coffee to be 1000kg/m3 and latent heat of fusion of water to

    asked by tony on March 14, 2017
  59. basic science

    1 litre of coffee at 80oC need to be cooled to 40oC. Assuming that all the ice melts and no heat is lost to the environment. Take the specific heat capacity of coffee to be 4200J/kgK, density of coffee to be 1000kg/m3 and latent heat of fusion of water to

    asked by tony on March 14, 2017
  60. chemisrty

    Q6) A 10 L container contains a mixture of 0.8 g of He and 8 g of Ar at 0 oC. a) (1 pt) Calculate the total pressure of the gas mixture. b) (1 pt) Calculate the partial pressure of each gas in the gas mixture. c) (1 pt) If the initial total pressure of the

    asked by lyan on January 21, 2012
  61. Math

    the right circular cone of a radius 12 inches and height 9 inches is intially filled with water. the water from the cone is drained into the intially empty rectangular prism below it until the surface of the water is halfway down the lateral edge of the

    asked by Hay on November 14, 2018
  62. ap chemistry

    A mixture contains only NaCl and Fe(NO3)3. A .456 gram sample of the mixture is dissolved in water and an excess of NaOH is added, producing a precipitate of Fe(OH)3. The precipitate is dried and filtered, and its mass is determined to be .107 g. The mass

    asked by kelly on October 6, 2010
  63. Solubility of a Salt - Chemistry

    a) How many grams of KNO_3 should be added to 100 mL of water at 25°C to make a saturated solution? b) The solubility of KNO_3 increases as temperature increases. When KNO_3 dissolves, is the process endothermic or exothermic? c) When CaCl_2 dissolves,

    asked by J.M. on October 17, 2006
  64. College Gen.Chemistry

    A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a

    asked by Anonymous on March 25, 2014
  65. Chemistry - Science (Dr. Bob222)

    A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a

    asked by Anonymous on March 25, 2014
  66. Chemistry Dr. Bob

    This is in response to the fact that my experiment had me come up with my own.. I was supposed to measure out as close to 1g as possible of sodium bicarbonate as possible.. This is my lab procedures: Plastic Cup A 1. Measure out 50 mL of distilled water

    asked by Jennie on March 4, 2015
  67. physics

    A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the

    asked by carly on March 28, 2012
  68. physics

    A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the

    asked by jack on March 28, 2012
  69. Physics

    A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the

    asked by cassidy on March 28, 2012
  70. physics

    A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the

    asked by caroline on March 28, 2012
  71. physics

    A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the

    asked by cassidy on March 28, 2012
  72. Maths

    A right circular cone of base radius 5 cm and depth 20 cm is held with its vertex downwards. If water is leaking through a small hole in the vertex at the rate of 8 cm^3/s, find the rate of change of the water level in the cone when the radius of the water

    asked by Mary on January 7, 2017
  73. Physics

    A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the

    asked by kari on March 28, 2012
  74. physics

    A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the

    asked by cassidy on March 28, 2012
  75. physics

    A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the

    asked by nick on March 28, 2012
  76. Chemistry

    A sample of zinc metal reacts completly with an excess of hydrochloric acid: Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) The hydrogen gas produced is collected over water at 25.0 °C. The volume of the gas is 78.0 L & the pressure is 0.980 atm. Calculate the

    asked by ChemLover on August 12, 2011
  77. physics

    A boat floating in fresh water displaces water weighing 35.6 kN. (a) What is the weight of the water this boat displaces when floating in salt water of density 1.10 x 10^3 kg/m^3? (b) What is the difference between the volume of fresh water displaced and

    asked by Meghan on November 14, 2010
  78. physics

    whn a body hanging frm a spring balance is immersed in water it floats in water just below the surface of water & shows 100g loss in its weight 1-wht is thw weight of body in water? 2-wht is thw weight of body in air 3-wht is upthrust on the body? 4-wht is

    asked by Riya sood on September 17, 2015
  79. science and technology

    whn a body hanging frm a spring balance is immersed in water it floats in water just below the surface of water & shows 100g loss in its weight 1-wht is thw weight of body in water? 2-wht is thw weight of body in air 3-wht is upthrust on the body? 4-wht is

    asked by raman on January 8, 2016
  80. physics

    At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how

    asked by Riana on April 1, 2013
  81. physics

    At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how

    asked by Riana on April 1, 2013
  82. PHYSICS

    At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how

    asked by Riana on April 1, 2013
  83. PHYSICS help please!!!!!!!!!!

    At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how

    asked by Riana on April 1, 2013
  84. Physics

    A hand-pumped water gun is held level at a height of 0.85 m above the ground and fired. The water stream from the gun hits the ground a horizontal distance of 6.9 m from the muzzle. Find the gauge pressure of the water gun's reservoir at the instant when

    asked by Jake on December 9, 2011
  85. science(chem)

    I'm making different concentrations of ethanol and I just wanted to check my calculations and method. Making ethanol concentrations of: 0.40% 0.30% 0.20% 0.10% 0.05% To make the 0.40% ethanol from stock solution using 100ml volumetric flask: (xg

    asked by ~christina~ on October 2, 2008
  86. chemistry

    Calculate the following: (a) mass of water in the hydrate sample (g): (b) number of moles of water in the sample: (c) mass of pure salt in the sample (g): (d) number of moles of salt in the sample: (e) molar ratio of water to salt in the sample: If the

    asked by Tony on February 12, 2012
  87. Chemistry

    The reaction Co(H2O)6^+2 + 4Cl- CoCl^-2 + 6H2O is at equilibrium. The right side is pink and the left side is blue. 1. What would happen if you added AgNO3? Would nothing happen? Or would the Ag+ react with the Cl- and shift the reaction left? 2. What

    asked by Heather on March 18, 2010
  88. Chemistry

    The reaction Co(H2O)6^+2 + 4Cl- CoCl^-2 + 6H2O is at equilibrium. The left side is pink and the right side is blue. 1. What would happen if you added AgNO3? Would nothing happen? Or would the Ag+ react with the Cl- and shift the reaction left? 2. What

    asked by Heather on March 19, 2010
  89. algebra

    Quan is shopping.He can buy 2 pairs of pants and 1 shirt for $79.85 (before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85.(before tax is added). To figure out how much a shirt of a pair of pants cost, you must be able to write the

    asked by paul on May 5, 2010
  90. Math - Alg

    How much pure acid must be added to a 30% acid solution to make a 60L solution which is 50% acid? This was the answer I got from Reiny. amount of pure acid to be added -- x L 1(x) + .3(60-x) = .5(60) 10x + 3(60-x) = 5(60) 10x + 180 - 3x = 300 7x = 120 x =

    asked by Brittany Jones on February 8, 2014
  91. algebra

    Quan is shopping.He can buy 2 pairs of pants and 1 shirt for $79.85 (before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85.(before tax is added). To figure out how much a shirt of a pair of pants cost, you must be able to write the

    asked by paul on May 5, 2010
  92. REGENTS(PRACTICE)

    A scientist wants to determine the best conditions for hatching brine shrimp eggs. In a laboratory, brine shrimp hatch at room temperature in glass containers of salt water. The concentration of salt in the water is known to affect how many brine shrimp

    asked by hoover on September 21, 2011
  93. Chemistry

    I need help with part b here's all information. (a) Chlorine gas is added to a glass cylinder of 2.5 cm in radius, fitted with a movable piston. Gas is added until the piston is lifted 5 cm off the bottom of the glass. The pressure on the gas is 1 atm, and

    asked by Angie on September 6, 2012
  94. Physics

    Many hot-water heating systems have a reservoir tank connected directly to the pipeline, so as to allow for expansion when the water becomes hot. The heating system of a house has 74 m of copper pipe whose inside radius is 9.10 10-3 m. When the water and

    asked by Maggie on April 6, 2008
  95. English

    What can we do to save water? 1.We can use our cups when we brush our teeth. 2. We can put a brick into the toilet. 3. We can use a waterbowl when we wash the dishes. 4. We can get rid of the old before we wash the dishes. 5. We can reuse the water after

    asked by rfvv on April 14, 2015
  96. PHYSICS

    The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of 807 m. If water at the top of the falls is at 16.7°C, what is the maximum temperature of the water at the bottom of the falls?

    asked by PLEASE HELP on November 26, 2012
  97. TRIGONOMETRY ASAP!

    fountains are designed so that the height and distance the water travels is dependent on θ, the angle at which the water is aimed. for any given angle θ, the ratio of maximum height H of the water to the horizontal distance D it travels is given by the

    asked by ceci on April 3, 2012
  98. Algebra

    The depth of the water in Jeanne's hot tub varies directly with the number of minutes that the faucet is turned on. At 8.15 A.M Jeanne's started filling her circular hot tub with water. At 8.59 A.M there was a foot of water in the tub. When will the hot

    asked by Jynessa on November 10, 2013
  99. Science

    A Sample of seaweed contains 1 Liter of water and has 50 grams of salt dissolved in its cells. The seaweed is placed in a solution made of 2 Liters of water and 150 grams of dissolved salt. What will occur when the system reaches equilibrium? A. The

    asked by Failing on September 28, 2018
  100. math

    how do you calculate theoretical yield of something? I don't know where to find the formula You go to the balanced chemical equation, and look at the mole ratio between the reactants and products. The theoretical yield is the value calculated from

    asked by james on January 31, 2007