CHEMISTRY (WEBWORK)

58,512 results, page 91

chemistry

Determine the mass of CO2 gas that has a volume of 7.10 L at a pressure of 1.11 atm and a temperature of 31.0°C.

Chemistry 12

which of the following 0.10M solutions is basic? A LiCl B K3Po4 C NaCLO4 D NH4NO3 Is it C?

chemistry

how would you prepare a 550ml of 0.350 normal calcium chloride solution

Chemistry

Let say Pb(NO3)2 combine with FeCl3, would this yield PbCl + Fe(NO2)3? Thanks

chemistry

25g of NaCl is deissolved in 100g of water. what is the concentration in percentage by mass?

Chemistry

Theres an airplane with a mass of 5.4g, 305. mm long, moving at 1.8m/s. Is it classic or quantum?

Chemistry

How much heat energy, in kilojoules, is required to convert 36.0g of ice at 18.0C to water at 25.0C

chemistry

when 2.31 moles of sulfur hexafluoride are synthesized from te elements, how many grams of fluorine were used

chemistry

is the osmotic pressure formed by dissolving 50.9 mg of aspirin (C9H8O4) in 0.450 L of water at 24°C

chemistry

Iwish to prepare 3% NH3 from 20ml strong NH4OH and 180ml H2O.Can you help me?

chemistry

What is the molarity of the solution containing 6.245g of oxalic acid, H2C2O4 in 750mL

chemistry

How many grams of rubidium chloride are present in 125.0 mL of a 1.75M RbCl solution?

chemistry

What is the mass of 3 moles of barium? Round to the nearest tenth. Don't forget the units.

chemistry

How many grams of copper can be dissolved by 20.0 mL of a 69.6% (by mass) nitric acid solution that has a density of 1.41 g/mL?

ap chemistry

What is the density of hydrogen sulfide (H2S) at 0.9 atm and 295 K? Answer in units of g/L

Chemistry

Explain the raise of bonding angle in these molecules: HF, H2O, NH3 and CH4

Chemistry

CHemical equation showing how NH3 behaves as a base when dissolved in water

Chemistry

How many milliliters of water has been dispensed if the initial buret reading was 0.38 ml and the final is 24.70 ml

chemistry

In terms of kinetic theory explain why tyre should not be over inflated

Chemistry

Given a very concentrated glycercol solution. Dilute it to 7.5 fold dilution. How do I do this ?

chemistry

If 22.4 dm3 of steam react with MgO, calculate the mass of the product that will form.

chemistry

What is the density of a 16.54 g object if the dimensions of the block are: length = 12.6 mm height = 1.91 cm width = 0.0140 m

Chemistry

Calculate the density a gas will have at STP if its molar mass is 41.8 g/mol.

Chemistry

What volume in liters would contain 5.30 x 10^24 molecules of hydrogen gas at STP?

chemistry

Calculate the amount of zirconium produced (in kg) if a reactor were charged with 261.0 kg ZrCl4 and 25.0 kg Na .

CHEMISTRY

WHAT IS THE MEANING OF THE NUMERICAL REPRESENTED BY X IN THE GENERAL FORMULA FOR HYDRATE; SALT H2O?

college chemistry

Why is it that sodium chloride or acetic acid can't bee steam distilled??

Chemistry

Calculate the volume in liters of the gas (O2) at STP if it was massed at 6.75 x 105 grams.

Chemistry

How many moles of magnesium sulfate are needed to make in a solution of 0.10g Mg2SO4?

Chemistry

How much 5M KOH must be added to 1.0 L of 0.1M glycine (pKa 9.6) at pH 9.0 to bring its pH to exactly 10.0?

Chemistry

calculate the amount of energy required to vaporize 43.0g of water at its boiling point

chemistry

If you are given 718 grams of lead (iv) oxalate, how many atoms of oxygen do you have?

chemistry

1040 grams of chlorine gas at STP would have what volume?

Chemistry

Would you balance this one SO2 + O2. SO3 Like 2SO2 + O2. 2SO3

general chemistry

In an appropriate reference read a dicussion of mass and volume measurements

chemistry

What volume of oxygen would be required for the complete combustion of 23.4g of benzene, C6PO4?

Chemistry

What are the attractive forces that increase surface tension? -Would it be cohension and adhension? Thanks

Chemistry

If 15gram of potassium trioxochlorate V is heate in MnO2.What is the mass of chloride produce

Chemistry

How many mols of OH-(aq) ions are present in 20.33mL of 1.33M sodium hydroxide solution?

Chemistry

Why is why is CH4+2O2 --> CO2+2H2O very slow at room temperature?

general chemistry

Calculate the molarity of each of the following solutions.70.8g C2H60 in 2.51L of solution

chemistry

which alkali metal form superoxidess?(2)explain why rubidium has a short life?

Chemistry

What is the pH of a 0.77M solution of methylamin at 25 degree C? CH3NH2, Kb= 4.4X10-4? How do I set this up to get the answer?

Chemistry

1.55 g of penatanol 250ml water Heat from 10 to 38 degrees Find hear of combustion

please help analytical chemistry

what is the activity coefficient of SO4^2- when the ionic strength of a solution is .1?

Chemistry

How many grams of Na3PO4 are needed to produce 250mL solution that has an Na concentration of 1.04M?

Chemistry I

Determine the hydronium ion concentration in a solution that is 0.00018 M Ca(OH)2. Answer in units of M

Chemistry

2H2O --> 2H2 + O2 if 30 mL of hydrogen in the above reaction, how many milliliters of oxygen are produced?

Chemistry

2H2O --> 2H2 + O2 if 30 mL of hydrogen in the above reaction, how many milliliters of oxygen are produced?

Chemistry

2H2O --> 2H2 + O2 if 30 mL of hydrogen in the above reaction, how many milliliters of oxygen are produced?

Chemistry

How many moles of NaOH must be added to 1.0 L of 2.2 M HF to produce a solution buffered at each pH? (a) pH = pKa (b) pH = 4.24 (c) pH = 4.60

Chemistry

What is the molarity of nitrate ions in a solution containing 2.20 mg of Mg(NO3)2 dissolved in 7.35 L of water?

Chemistry

When 20.0 g C2H6 and 60.0 g O2 react to form CO2 and H2O, how many grams of water are formed?

chemistry

How do you sole this problem: how many grams of CaCl2 are needed to prepare 7.25 L of .015M solution?

Chemistry

You are to prepare a KH2PO4 and Na2HPO4 solution with pH=7.31. What should the concentration of [2(HPO4) 2-] / [H2PO4-]

Chemistry

The Ksp of magnesium hydroxide, Mg(OH)2, is 5.61 × 10^-12. Calculate the molar solubility of this compound. Is the answer 1.1*10^-4 M?

chemistry

how many grams of Na2SO4 can be produced by the reaction of 250g of NaOH with sufficient H2SO4?

chemistry

How many moles of sulfate ions are in 100 ml of a solution of .002 M Fe2(SO4)3?

chemistry

the enzyme that takes in the SO2−4 that provides the sulfur atom for cysteine.

chemistry

if the molar mass of BaCl2 is 208.3 g/mol, how many grams are present in 0.25 moles?

Chemistry

How many grams of C6H12O6 must be added to 0.750 kg of water to make a 1.25 m solution?

Chemistry

Name the organic product of the following nucleophilic substitution reaction. OH+CH3CH2I

Chemistry

7. A solution is prepared by dissolving 8.5 g NaHCO3 and 12.7 g Na2CO3 in 500.0 mL of water. Calculate the pH.

Chemistry

7. A solution is prepared by dissolving 8.5 g NaHCO3 and 12.7 g Na2CO3 in 500.0 mL of water. Calculate the pH.

Chemistry

Why does the color of Methyl Orange change at all in he presence of buffer components?

chemistry

what is the total heat lost if you have 8 grams of copper and the temperature changed from 43°C to 36°C

Chemistry

What are the reducing agent and the oxidising agents in the synthesis of ammonia from hydrogen and nitrogen?

chemistry

why is the head temperature kept below 90 c in the initial step of the dehydration reaction?

chemistry

How will an increase in pressure influence the amount of SO2(g) present at equilibrium?explain.

chemistry

How many milliliters of commercial hydrochloric acid, which is 11.6 M, should be used to prepare 6.94 L of 0.52 M HCl?

chemistry

Calculate the new molarity when 150 mL of water is added to 125 mL of 8.55 M HBr.

Chemistry

How many joules of energy are needed to change 275 g of water from 15°C to steam at 100.°C?

chemistry

What is the concentration when 60.0 mL of a 9.00 M HCl solution is diluted to 1.170 liters? and how do you solve this problem?

chemistry

How many moles are contained in 3.25 L sample of an ideal gas at 25 Celsius and 204 kPa?

chemistry

How can I identify the ions present in (NH4)2SO4.FeSO4.6H2O qualitatively?

Chemistry

I'm having trouble balancing this equation: SO3^2- --> S2O4^2- It's in a basic solution. Thanks.

Chemistry

If a buffer solution is 0.160 M in a weak base (Kb = 2.3 × 10-5) and 0.550 M in its conjugate acid, what is the pH?

Chemistry

Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??

Chemistry

Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??

Chemistry

What mass of silver can be produced by reacting 0.300 L of 0.100 M AgNO3 with an excess of Mg?

Chemistry - DrBob Help!

Draw product for chlorination of 2methylbutane through a 2nd radical

Chemistry

How many milliliters water are needed to make a 0.171 M solution that contains 1.00 g of NaCl?

Chemistry

How many grams of NaF should be added to 612 ml of 0.4 M HF (Ka = 6.8 x 10-4) to produce a buffer solution where pH = 3.10?

chemistry

how do I carry out qualitative analysis on (NH4)2SO4.FESO4.6H20

Quantum/inorganic chemistry

c. Which of these electron configurations has the 4F term symbol for its ground state? p3 d3 d4 f2 f3

chemistry

Calculate and record the average molar heat of reaction from the three results.

chemistry

A gas absorbs 25kj of heat and does 12kj of work calculate (triangle) E

Chemistry

Calculate the standard potential, E^o, for this reaction from its equilibrium constant at 298K. X(s)+Y^2+(aq)= X^2+(aq)+Y(s) K=8.68E6 E^o=??V

chemistry

what mass of baking soda would completely react with 3.8 g acetic acid

chemistry

If 275 mL of hydrogen gas is produced at STP, what is the mass of lithium that reacted

Chemistry

What method of purification is used to separate iodoethane from traces of hydrogen iodide? Thanks :)

Chemistry

What is the number of ATP molecules produced by the beta oxidation of eicosanoic acid?

chemistry

in relation to the pH of pure water at 25 degree Celsius where do the pH values of acid fall

chemistry

If 10.4 liters of O2 at STP are produced by the electrolysis of water, how many coulombs of charge were required?

chemistry

if burning one mole releases 1310.0 kj, then how many moles will release 227.30?

chemistry

how many milliliter of .750M sulfuric acid are needed to neutralize completely 20 g of NaOH?

Chemistry

Net Ionic Equation for reaction between bromide and silver nitrate

CHEMISTRY URGENT!

alpha emission by plutonium 242 write a nuclear equation

Chemistry

how many joules and calories are produced from the reaction CaCl2+H2O=HCl+CaOH

inorganic chemistry

what is the product of reaction dehydrated K3(Al(C2O4)3) with KMnO4 in the present of KOH?

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  26. 26
  27. 27
  28. 28
  29. 29
  30. 30
  31. 31
  32. 32
  33. 33
  34. 34
  35. 35
  36. 36
  37. 37
  38. 38
  39. 39
  40. 40
  41. 41
  42. 42
  43. 43
  44. 44
  45. 45
  46. 46
  47. 47
  48. 48
  49. 49
  50. 50
  51. 51
  52. 52
  53. 53
  54. 54
  55. 55
  56. 56
  57. 57
  58. 58
  59. 59
  60. 60
  61. 61
  62. 62
  63. 63
  64. 64
  65. 65
  66. 66
  67. 67
  68. 68
  69. 69
  70. 70
  71. 71
  72. 72
  73. 73
  74. 74
  75. 75
  76. 76
  77. 77
  78. 78
  79. 79
  80. 80
  81. 81
  82. 82
  83. 83
  84. 84
  85. 85
  86. 86
  87. 87
  88. 88
  89. 89
  90. 90
  91. 91
  92. 92
  93. 93
  94. 94
  95. 95
  96. 96
  97. 97
  98. 98
  99. 99
  100. 100