1. Chemistry

    A student mixed 75.0 mL of water containing 0.75 mol HCI at 25* C with 75.0 mL of water containing 0.75 mol of NaOH at 25*C in a foam cup calorimeter. The temperature of the resulting solution increased to 35*C. How much heat in kilojoules was released by

    asked by Tarra on April 27, 2011
  2. physics

    the mass of the water is 131 kg and its initial temperature is 24.2°C, how much energy must the water transfer to its surroundings in order to freeze completely? The specific heat of water is 4186 J/kg·K, and the latent heat of fusion is 333 kJ/kg

    asked by kb on August 5, 2014
  3. Chemistry

    Calculate the solubility of LaF3 in grams per liter in the following solutions. The Ksp of LaF3 is 2.01 e-19. (a) pure water (b) 0.051 M KF solution (c) 0.065 M LaCl3 solution

    asked by Tiffany on October 1, 2010
  4. chemistry help asap please

    You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l.

    asked by David on January 9, 2017
  5. chen

    Calculate the solubility of Pbso4 in a water sample, which contain 1.4x10-2M Cacl2? Given : Ksp for Pbs04= 1.6x10-8M2 Ksp for Cas04= 2.6x10-5M2

    asked by Gallop on November 10, 2015
  6. Chemsitry

    At 25 °C, only 1.9 g CaSO4 (MM = 136 g/mol) will dissolve in 2.00 L of water. Write the equilibrium expression and calculate the equilibrium constant for the reaction below. CaSO4 (s) ⇋ Ca2+ (aq) + SO42- (aq)

    asked by Michelle on June 13, 2010
  7. science

    A solution of NaOH(molar mass 40g mol-1)is prepared by dissolving 1.6g of NaOH in 500 cm cube of water.Calculate molarity(M) of the solution

    asked by Divya on April 6, 2013
  8. Chemistry

    Some hydrogen is collected over water at 10 degrees C and 105.5 kPa pressure. The total volume of the sample was 1.93 L. Calculate the volume of the hydrogen or reacted to STP.

    asked by Charlie on March 1, 2016
  9. science

    a man drops a stone in a well and hears the sound of the stone hitting the water after 4 sec calculate the depth of the well ( assuming the speed of sound in the well is 364 m\s )

    asked by meera on September 29, 2011
  10. Chemistry

    calculate the enthalpy change in delta H foor heating 250 grams of liquid water from 0 degrees celcius to 100 degrees celcius.

    asked by Bri on February 11, 2011
  11. Chemistry

    Thirty feet of water exert a pressure of 1 atm. Calculate the pressure (in kPa) exerted on a diver at a depth of 50 feet on a standard day.

    asked by Victor on April 9, 2017
  12. math

    a 150g-iron ball at 95 Celsius is dropped into a cavity in a block of ice.the cavity is then found to contain 21 g of water . calculate the heat of fusion of ice.

    asked by Ken on January 27, 2015
  13. physics

    A 150g iron ball is dropped into a cavity in a block of ice. The cavity is then found to contain 21g of water. Calculate the heat of fusion of ice.

    asked by omay on December 8, 2015
  14. chemistry

    how would you calculate the number of milliliters of 1 M HCl required for .212 mol of HCl?? and how could i find out what remains in the beaker when distilled water is evaporated in a beaker?

    asked by Kayla on May 6, 2008
  15. CHEMISTRY

    You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l.

    asked by Jason on January 9, 2017
  16. chemistry

    A student is performing an experiment to find the density of water. She obtains a 100ml beaker, which weighs 53.257 grams, and she fills it with 60 mL of water. The temperature of the water is 25.5 degrees celsius (room temperature). Again the student

    asked by Samantha on February 16, 2015
  17. college

    For each set of parameter values: - Calculate the optimal time to extract the resource - How do you find switchpoint/ transition point? - Calculate the Extraction path (Q0, Q1, etc.) - Calculate the MUC in each period - HOW DO U FIND MUC? - Calculate the

    asked by Kimberly on October 27, 2008
  18. Chemistry (urgent)

    Hydrolysis of a compound A, C7H6cl2 was carried out by refluxing with excess potassium hydroxide solution. the resulting solution was acidified with dilute HNO3 acid and excess silver nitrate was added to precipitate the chloride ions as silver chloride.

    asked by Kris on October 23, 2014
  19. Chem 22

    3.5 cm of Mg ribbon(0.009729 g/cm0 reacts with HCL to produce 32.6 ml. of Hydrogengas at 750 mm Hg and 20 degree C. the vapor pressure of water at 20 degree C is 17.5 mm Hg. Calculate the molar volume of hydrogen (L/mole) and the percent error in your

    asked by mary on July 23, 2012
  20. chemistry

    From the following Information, calculate the standard change of enthalpy for the combustion of coal. SHOW WORK AND BALANCED REACTION!!! Compound DeltaHf (kj/mol) Coal 0.0 Carbon dioxide -393.5 Water (l) -285.9 Oxygen 0.0

    asked by Chloe on June 12, 2012
  21. physics-buoyancy

    Use Archimedes' law of buoyancy. - to calculate what fraction of the volume of an iceberg floating in the ocean is above the water level. -how many 20kg penguins can be supported by a 1000 cubic meter iceberg that is on the verge of being completely

    asked by jen on May 8, 2011
  22. college

    Calculate activities of Ca2+ anf F- and the solubility of flurite in pure water at 25C without regard to possible hydroysis. Assume that all activity coefficients are equal to one. Express the solubility of florite in terms of mol/L and g/100mL?

    asked by moon on September 11, 2010
  23. chemistry

    Calculating final concentrations. Your instructor asks you to add the specified quantities of 2M Tris pH 8.0 buffer to 140 ml of distilled water. Calculate the final concentration and dilution factor of each solution. a)10ml b)20ml c)140ml

    asked by anonymous on August 27, 2012
  24. Chem 22

    3.5 cm of Mg ribbon(0.009729 g/cm0 reacts with HCL to produce 32.6 ml. of Hydrogengas at 750 mm Hg and 20 degree C. the vapor pressure of water at 20 degree C is 17.5 mm Hg. Calculate the molar volume of hydrogen (L/mole) and the percent error in your

    asked by mary on July 23, 2012
  25. chemistry

    From the following Information, calculate the standard change of enthalpy for the combustion of coal. SHOW WORK AND BALANCED REACTION!!! Compound DeltaHf (kj/mol) Coal 0.0 Carbon dioxide -393.5 Water (l) -285.9 Oxygen 0.0

    asked by Chloe on June 12, 2012
  26. chemistry

    The solubility product constant (Ksp) for the dissolution of PbSO4 as represented by the chemical equation is 1.7x10-8. PbSO4 (s)= Pb2+ (aq) + SO42- (aq) Calculate the mass (g) of PbSO4 that dissolves in 1100 mL of water.

    asked by andy on May 13, 2010
  27. chemistry

    presentation Tasks:  Ephedrine (structure see below) is a natural product that is used as a medicine in the treatment of asthma. The corresponding acid to ephedrine have pKa = 9.60 at 25 ° C.   Question:  Calculate the pH reaches 991 mg ephedrine

    asked by Maria on September 9, 2016
  28. physics

    A brass ball weighs 270gram in air and when it was immersed in water,it displaced 30 ml of water .how much will the ball weigh in water?

    asked by kj on March 13, 2014
  29. Chemistry

    Assume a baker of pure water has been boiling for 30 minutes. What is in the bubbles in the boiling water? Answer: water vapor. WHY?

    asked by Jessica on January 17, 2014
  30. maths

    A spherical water tank is 100cm in diameter. It is half filled with water. How many cubic centimetre is the water in the tank?

    asked by Eta Archibong on May 2, 2016
  31. Math

    The pool is partially filled with water. The volume of the water in the pool is 45ft^2. How deep is the water? A) 0.5 ft B) 1.5 ft C) 2.5 ft D) 3.5 ft I don't have an answer yet. Can someone help me please?

    asked by ILTHSM_ on February 15, 2019
  32. Chemistry

    If 82.4 g of cold water (initially at 22 °C) is mixed in an insulated container with 96 g of hot water (initially at 88 °C), what will be the final temperature of the water in °C?

    asked by Rachel on April 30, 2014
  33. Chemistry

    A 50 gram sample of liquid water at 25 degrees C is mixed with 29 grams of water at 45 degrees C. The final temperature of the water is...?

    asked by Bree on December 6, 2012
  34. Science

    Water freezes at 0 Celisus. If a temperature drop is causing a glass of water to freeze, how would a thermometer in the water most likely change as the water freezes? A. The temperature would keep rising steadily. B. The temperature would keep falling

    asked by Anne on October 20, 2013
  35. 5th grade

    I need a little help on this worksheet I got... I have an answer but I'm not sure if it is correct. ALGEBRA--- Translate each verbal expression into an algebraic expression. Then, simplify the expression. 1. Two sets of the sum of a number and eight are

    asked by Sahana Epari on July 4, 2009
  36. math

    An equation and the steps to solve it are shown below: 3x − one over two (8x − 2) = 4 Step 1: 3x − 4x + 1 = 4 Step 2: x + 1 = 4 Step 3: x + 1 − 1 = 4 − 1 Step 4: x = 3 Which step was the error made and why? Step 1, because incorrect signs have

    asked by oscar on September 4, 2015
  37. math

    An equation and the steps to solve it are shown below: 3x − one over two (8x − 2) = 4 Step 1: 3x − 4x + 1 = 4 Step 2: x + 1 = 4 Step 3: x + 1 − 1 = 4 − 1 Step 4: x = 3 Which step was the error made and why? Step 1, because incorrect signs have

    asked by oscar on September 4, 2015
  38. Chemisty

    A certain salt is known to have a solubility in water of 25.2g/100g water at 100°C and 11.4g/100g water at 20°C. The salt is dissolved in 240 g of water at 100°C until no more solid will dissolve. How much salt will crystallize out when the solution is

    asked by love on January 19, 2012
  39. Chemistry

    12.5 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 675 mL of solution. Calculate the molarity of the KCl solution.

    asked by Alex on November 28, 2010
  40. chemistry

    Calculate the mass of barium chloride you need to make a 0.200 m barium chloride solution with 100.0 g of water.

    asked by hereyago on April 19, 2012
  41. Chemistry

    Enough of a monoprotic acid is dissolved in water to produce a 0.0190 M solution. The pH of the resulting solution is 2.33. Calculate the Ka for the acid.

    asked by Ann on March 26, 2013
  42. 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
  43. Chem 1010

    15.3 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 600 mL of solution. Calculate the molarity of the KCl solution.

    asked by Sirena on April 10, 2012
  44. 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
  45. 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
  46. Science

    A solution contain 40 centimetre cube of alcohol mixed with 150 cm cube of water calculate the concentration of the solution

    asked by Nasrin on May 28, 2017
  47. College Chemistry

    Calculate the number of Joules released when 75.0 g of water are cooled from 100.0 degrees Celsius to 27.5 degrees Celsius

    asked by Josh on October 25, 2012
  48. chemistry

    enough of a monoprotic acid is dissolved in water to produce a 0.0111M solution. The pH of the resulting solution is 2.62. Calculate the Ka for the acid.

    asked by airo on October 12, 2012
  49. chemistry

    calculate the heat released when 166g of water at 23.0 degrees celsius are converted to ice at -10.0 degrees celsius

    asked by Angela on January 21, 2011
  50. Chemistry

    Enough of a monoprotic acid is dissolved in water to produce a 0.0169 M solution. The pH of the resulting solution is 2.68. Calculate the Ka for the acid.

    asked by Lee on April 21, 2012
  51. 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 22, 2012
  52. chem

    at 40 degree C , the vapour pressure of water is 55.3 mm of hg. calculate the vapour pressure at same temp. of 10%aques solution of urea??

    asked by niki on June 7, 2011
  53. 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
  54. 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
  55. 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
  56. 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
  57. 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 11, 2015
  58. 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
  59. 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 27, 2012
  60. 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 17, 2015
  61. 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 29, 2011
  62. 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 11, 2010
  63. 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 27, 2015
  64. 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 4, 2012
  65. 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
  66. 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
  67. 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
  68. 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
  69. 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
  70. 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
  71. 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
  72. 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
  73. 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
  74. 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
  75. 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 6, 2013
  76. 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 1, 2009
  77. Chemistry

    An industrial raw materials as the following composition by mass : iron = 28.1% chlorine = 35.7% and water of crystalization = 36.2%. Calculate the formula for the material given that Hydrogen is 1, oxygen is 16, chlorine is 35.5 and iron is 56.

    asked by Christy on January 12, 2019
  78. 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
  79. 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 8, 2017
  80. Chemistry

    The aluminum sulfate hydrate [Al2(SO4)3 . xH2O] contains8.10 percent Al by mass. Calculate x, that is, the number of water molecules associated with each Al2(SO4)3 unit.

    asked by Destiny on February 19, 2019
  81. 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 August 31, 2015
  82. 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
  83. 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 16, 2012
  84. 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
  85. 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
  86. 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 8, 2014
  87. 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
  88. 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
  89. 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
  90. 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
  91. 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
  92. 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
  93. 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
  94. 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
  95. 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
  96. 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
  97. 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 6, 2014
  98. 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
  99. 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
  100. 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 22, 2010