CHEMISTRY (WEBWORK)

58,662 results, page 83

chemistry

How aluminium is extracted from its BAUXITE ORE which contains Fe203 and Sio2 as impurities?

chemistry

how many joules of heat are used in raising temp of 25 g of water from 20 to 35 degrees celcius

chemistry

Explain how you would convert from number of atoms of a specific element to its mass??

Chemistry

What is the structure of a tripeptide where glycine is first, serine is second, and alanine is third.

chemistry

the form of the conversion factor that is used is the one in which the unit of the_ is in the denominator

Organic Chemistry

why was it possible to separate the product from sodium hydroxide using acetone?

chemistry

grams of sodium chloride dissolved in 100mL of water at 20 degrees celcius

chemistry

what are some impressive lab acids that i could name and say what they're used for, for hw (for MONDAY)

Chemistry

Determine the volume of a 0.550 M KMnO4 solution required to completely react with 2.55 g of Zn.

chemistry

What aldehyde and primary alcohol might be oxidized to yield 4-methylcyclohexanoic acid?

Chemistry

What is the pH of a 0.0054 molal solution of C2H2O4. First ionization constant K1= 6.5 x 10-2, second K2= 6.1 x 10-5.

Chemistry

How many moles of Cacl are needed to be dissolved in .500g of H2O to form a 1.5m solution?

Chemistry

3.5 liters of H2O are added to 500 mL of a 2.0 M HNO3 solution. What is the resulting molarity?

Chemistry

Calculate the [h3o+] of the following polyprotic acid solution: 0.135 M H2CO3

chemistry

what happens when bicycle tyre bursts in summer due to adiabetic expantion?

Chemistry

Explain the relation between muscles, ATP energy, and the calcium ion

chemistry

How many atoms of hydrogen are found in 2.48 mol of propane, C3H8? Someone can explain to me. Thanks

Organic chemistry

What are two reasons why the crude product in most reactions is not pure?

Chemistry

I need help on a complex ion equation. I am not sure what the products are. Please help. Fe(OH)2 (s) + NaOH(aq)-->

chemistry

What is the equilibrium concentration of ammonium ion in a 0.77 M solution of ammonia (NH3, Kb = 1.8 ´ 10–5) at 25oC?

chemistry

What is the equilibrium concentration of ammonium ion in a 0.77 M solution of ammonia (NH3, Kb = 1.8 ´ 10–5) at 25oC?

Chemistry

A 0.490 M solution of an unknown monoprotic weak acid, HA, is 2.80% ionized. What is the value of Ka for HA?

Chemistry

The reaction rate triples when the temperature increases from 15 to 35 degree C. What is the activation energy?

chemistry

how do we calculate bond order of a molecule that has 3 different elements, like for example C-N-O

Chemistry

What will be the final temperature of a 22.0 g piece of iron (Cp = 25.09 J/K • mol), initially at 25°C, if it is supplied with 28.2 J from a stove?

chemistry

what is the pressure exerted by a 0.500 mol sample of nitrogen in a 10.0 L container at 20 degrees C?

Chemistry

What's the balanced chemical equation of cleaning up oil, whether it be a spill, pipe etc.

chemistry

explain how you would convert from number of atoms of a specific element to its mass

Chemistry

why should heating a content containing Zn and HCl be heated in fume hood.

chemistry

help balance this redox equation: HNO3 + Zn(s) <==> NO(s) + ZnO ...i know i need H2O and possibly H+

Chemistry

Enter the Net Ionic Equation including phases, for the reaction of AgNO3 and Ba(OH)2.

chemistry

How do you find the number of moles in a substance if you have the density and the molecular weight?

organic chemistry

What's an equation of the hydrolysis of one ester group in tannins by CaCO3?

chemistry

why does the volume of a balloon decrease when it is taken outside on a cold winter day?

7th grade chemistry

how is potassium sulfate prepared?explain with chemical reaction.

chemistry

If you start with 1.00 g NaCl and an excess of the other reactants, how many grams of Cl2 will be produced?

chemistry

which of these salts is least soluble in water? 1. LiCl 2. RbCl 3. FeCl2 4. PbCl2

Chemistry

Which of the following has the highest vapor pressure? CCl4 CBr4 CH3CH3 CH3CHBr2

chemistry

What volume of .200M NaOH will be required to react completely with 32 mL of .15M HNO3

chemistry

find the mass of solute needed. 3.0 liters of 2.0 M NaOH. or 500ml of 1.5 M NaCl?

chemistry

if 25.0 ML of 15M nitric acid is diluted to 125 mL, what is the concentration of the new solution?

chemistry

Determine the volume of H gas needed to react completely with 5.00 L of O to form water ?

Chemistry

For which of the following atoms is the 2+ ion paramagnetic? Sn Mg Zn Mn Ba The answer is Mn. How do you figure this question out?

CHEMISTRY

Hi! Where can I find a list of the molecular formulas for the elements? like hydrogen is H2 and sulfur is S8

chemistry

What are the oxidation states of the metals in the following compunds: [Ni (pyr)4NH3Br]I and Mn(C2O4)3 Thanks :)

chemistry

Which compound has the most ionic bond? a. KCl b. LiCl c. KF d. NaCl e. LiF

Chemistry

I need to find the mass of solute that will dissolve in 300 g water at 45 degrees C.

College Chemistry

explain why krypton can form compounds with other elements, but neon cannot

chemistry

0.100 M of NaNO2 and 0.050 HNO2. what is the H3O of this solution? set up please.

chemistry

what volume of .5 m sulfuric acid is needed to react completely with 10 mL of 2m potassium hydroxide

chemistry

Calculate the number of mL you would use to prepare 5.0 L of 0.20 M NaOH from a 5.23 M stock solution.

chemistry

Which of the following is a strong Acid? HNO3, H3PO4, NH4, CO3(2-), H20

Chemistry II

Compute the equilibrium constant for Ni^2+ (aq) and Cd (s). I keep getting 1.7*10^-3 but apparently that is wrong. What am I doing incorrectly?

Chemistry

Which compound has a value of Ka that is close to 10^-5? A)NaCl B)HN03 C)CH3CH2C02H D)KOH E)NH3

chemistry

How does the kinetic theory explain how you can smell coffee and bacon at the same time?

CHEMISTRY

can we use the molecular formula to predict the shape of a small molecule? Explain.

chemistry

you have 2.0 grams of water at 0 degrees Celcius. how many kilojules of heat will freez it?

Chemistry

Calculate the density of carbon dioxide gas at 253K and 648 torr.

CHEMISTRY

What substances will increase the molar solubility of nickel(II) phosphate in a saturated solution?

chemistry

what is the number of calories of heat energy released when 25 grams of water is cooled from 20 C to 10 C?

Chemistry

Which compound is a saturated hydrocarbon? ethane ethene ethyne ethanol Thanks for any help you can give

Organic Chemistry

The following reaction would produce a(n) __________. R-OH + R'COOH →

Chemistry

When you add 25.0 mL of 1.0 M NaF to 20.0 mL of 1.0 M HF,what would be the result? I think it's a basic buffer. Am I right?

Chemistry

Hi I need help with sig figs with this problem (0.6216+0.0871)/(0.0740+0.0335)

chemistry

for a given substance what information links mass to moles? number of particles

science- chemistry

What is the concentration of Ag+ in 0.0543M AgNO3 and 1.1657CN-? Ag+ +2CN- <-> [Ag(CN)sub2]- kf = 5.3x10^18

chemistry

How much heat is evolved when 1258 g of water condenses to a liquid at 100.°C?

Chemistry

What is the equilibrium constant for the reaction: HCOOH(aq)+ OH (aq) <--> HCOO(aq)+ H2O(l) Ka= 1.7 * 10^-4 Kb for the conjugate base= 4.9 * 10^-11 Thank you!

chemistry

in any experiment does water in a beaker absorb or release energy in the form of heat?

chemistry

6) How many grams of copper (II) fluoride, CuF2, are needed to make 6.7 liters of a 1.2 M solution?

chemistry

How much concentrated 12 M hydrochloric acid is needed to prepare 100.0 mL of a 2.0 M solution?

chemistry

how much energy would be needed to warm 7.40 g of water by 55 degrees celcius

Chemistry

Explain the effect each of the following has on the rate of a reaction. reactivity of reactants inhibitors

chemistry

for Fe + V2O3 -----> Fe2O3 + VO write the two half reactions and calculate voltage

Chemistry

How many grams of lithium nitrate, LiNO3, are required to prepare 3.00 × 102 mL of 2.00 × 10–1 M solution?

Chemistry

Why does woo burn more rapidly in a fireplace that has a good draft of air?

Organic Chemistry Lab

They are asking me to predict the boiling point at pressure of 30 torr. How would I do that? Thanks :D

Chemistry

Why is it important for a company manufacturing vinegar to regularly check the molarity of its product?

chemistry

What is the carbonate-ion, CO3-2, concentration in a 0.037 M carbonic acid solution? a. 1.2 ´ 10-4 b. 4.2 ´ 10-7 c. 7.6 ´ 10-8 d. 4.8 ´ 10-11 e. 5.2 ´ 10-19

chemistry

how many moles of acetic acid are in 15.05mL, 45.13mL, and 75.22mL of titrated vinegar?

Chemistry

Need help with : Balancing oxidation reduction reactions Mg(s) + HCl(aq) → Mg^2+(aq) + Cl ‾(aq) + H2(g)

chemistry

what volume of methane is needed to completely react with 500 liters of oxygen?

Chemistry

why is it important for company manufacturing vinegar to regularly check the molarity of its product?

Chemistry

Can you show me how to balance this equation using 1/2 reactions? Zn + NO3- ----> NH3 + Zn(OH4)-2

Chemistry

How many individual hydroxide ions (OH)- are found in 13.4mL of 0.586M Ba(OH)2? I'm not quite sure how to do this. Thank you!

chemistry

How many liters of gas can be produced at STP from 25.0 of ? Zn(s) + 2HCl(aq)->ZnCl2(aq) + H2(g) I'm using V=nRT/P and can't get this

chemistry

1. How many joules of energy must be absorbed to raise the temperature of 20 grams of water from 25°C to 30°C?

chemistry

What effect does bending, stress, or machining have on the tendency of iron to corrode? 

chemistry

Under what conditions might a chemist describe a solution in terms of molality? Why??

chemistry

Why are the published values of the boiling points of substances always taken at 1 atm?

chemistry

Why are the published values of the boiling points of substances always taken at 1 atm?

Chemistry

Howm many moles of chromate ions must have been in K2CrO4?

Chemistry

What is the concentration of a solution which contains 1 mole of CaCl2 dissolved in 2000mL of solutions?

Chemistry

I have [CoCl4}2 /{Co(h2O)6}2+and add AgNo3 what does silvirnitrate does and how is that consit with Chatelier

chemistry

Why is it important for a company manufacturing vinegar to regularly check the molarity of its product?

chemistry

if density of a gas is 1.2 g/L at 845. torr and 20 degress celcius, what is its molecular mass?

Chemistry

How many g of KCL would have to be dissolved in 60g H2O to give 25% by wt. of solution?

Chemistry

a gaseous sample occupies 32.4 mL at -23 degrees C and 0.75 atm. What volume will it occupy at STP?

chemistry

What affect does salt have on ice water? Is there a term for it and a website that explains this?

Chemistry

Determine the empirical formula for the compound that contains 55.0 g carbon and 294 g sulfur

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