CHEMISTRY (WEBWORK)

58,560 results, page 82

Chemistry

Write a balanced chemical equation for single eisplacement reaction. Al+H2SO4

chemistry

if equal volumes of solutions having pH6 and pH7 are mixed what is the resulting pH?

chemistry

If a graduated cylinder wasn't calicrated correctly, how would that affect the results of a measurment?

chemistry

how many grams of solid NaOH are required to prepare 200.0 mL of a .050 M solution?

Chemistry

Is barometric pressure of 765.7 mmHg is equivalent to 1.008 atm? I'm confused.

chemistry

Why is the second not defined by the length of day? Is it because it's such a small fragment of time?

chemistry

suggest how the ester might be separated from any unreacted ethanoic acid or methanol

chemistry

A sample of C3H8O that contain 200 molecules contains ________carbon atoms??

chemistry

if 10 mol of hydrogen reacted with oxygen, what volume of liquid water could be produced?

chemistry.

What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass? ..My answer is NaSO and I am not sure... can anyone help me for it?????????

Chemistry

I am sooo confused on how to solve this problem, can anyone help me understand? calculate the pH of 0.10 M HCI solution?

Chemistry

Which element is oxidized in this reaction? Fe2O3+ 3CO-(arrow)2Fe+3CO2

chemistry

Sorry bobpursley for the multi post< i kept posting it wrong. thanks for yur help

chemistry

what is the percentage of sulfur and copper(I) sulfide, Cu2S is the answer 35.58% if not could you show me the formula

chemistry

How does the number of bonds in a carbon chain affect its melting and boiling points?

chemistry

Calculate q in J when 2.02 g of ice is cooled from -22.6°C to -73.8°C (cice = 2.087 J/g·K). Do not add units to your answer.

chemistry

To which one of the following reactions occurring at 25°C does the symbol deltaH°f[H2SO4(l)] refer

chemistry

What determines the order in which the component elements of binary molecular compounds are written?

chemistry

Name each of the following ions: b. ClO3- d. SO42- f. CO32- h. CH3COO- i. HCO3-

Chemistry

A microwave oven operates at 2.40 GHz . What is the wavelength of the radiation produced by this appliance?

chemistry

A laboratory test tube is 12.5 cm long and 2.50 cm in diameter. Calculate the volume of the capacity in mL

Chemistry

What minimum frequency of light is required to ionize potassium in419 KJ/mol?

chemistry

The mass of a golf ball is 45.9g . If it leaves the tee with a speed of 80.0m/s , what is its corresponding wavelength?

chemistry

The mass of a golf ball is 45.9g . If it leaves the tee with a speed of 80.0m/s , what is its corresponding wavelength?

Chemistry

What will happen to a well stoppered bottle filled with water left in the freezer overnight?

chemistry

how many totsl moles of ions are released when 0.83 mol of K3PO4 dissolves in water?

Chemistry

What is the molecular equation for the reaction between sodium (Na) and hydrochloric acid (HCl)?

chemistry

What is the density (in g/L) of hydrogen gas at 23.0 degrees Celsius and a pressure of 1670 psi?

Organic Chemistry

How is the rate of adjusted when using a sand bath as a heat source?

Chemistry

a student found the percent water in CaCl2*6H2O to be 45.5%. What's the experimental error? Is it 7.7%?

chemistry

What is the relationship between the temperature, speed, and kinetic energy of gas molecules

chemistry

How do gases compare with liquids and solids in terms of the distance between their particles

chemistry

how many grams of ethylene would have to be burned to produce 450 kJ of heat?

chemistry

what is the solubility of potassium nitrate (KNO3) in 100.0g of water 80degrees celcius

chemistry

For the reaction 2Na(s) + Cl(g) ¨2NaCl(s), how many grams of NaCl could be produced from 103.0 g of Na and 13.0 L of Cl (at STP)?

Chemistry

What are two differences between the red and green electromagnetic waves in a rainbow?

Chemistry

Estimate the solubility of lead (ll) chloride in grams per liter. ksp= 1.7 x 10^-5

chemistry

Having issues with significant figures. 82.420g + 3.24g = 85.66g Would it be 85.7g?

Chemistry

How can you prove that mass is being conserved when adding baking soda to vinegar?

chemistry

what is the specific heat capacity of substance X when 34.80 g of X is heated from a starting temperature of 20.5 C to 40.9 C by 2.54 kJ of energy

chemistry

what mass of silver was heated if its temperature rises from 21.0 C to 51.0 C as a result of absorbing 3.50 kJ of energy

chemistry

What is the longest possible continuous corbon chain in the compound 3,5,5-trimethyloctane? 10, 9, 8,or 6 carbons?

chemistry

i have difficulty in this question. any help would be appreciated. 1) What pH corresponds to each of the following: (a) (H+)=0.35M,(b)(OH^-)= 6.0*10^-6M. (d)(H+)= 2.5*10^-8M?

Chemistry

what is the density of an unknown substance whose mass is 4.5 grams and volume is 5 mil?

Chemistry

Rank these acids from weakest to strongest: H2C2O4, HCO3-, H2PO4-, HCOOH.

chemistry

How many milliliters of 0.155 M HCl are needed to neutralize completely 35.0 mL of 0.101 M Ba(OH)2 solution?

chemistry

what would the molarity of a solution be if you dissolved 50g of benzene in 500mls of water

chemistry

what inter particle forces are between molecules of carbon dioxide and water?

chemistry

fuels need a good supply of .... rockets often carry liquid....

chemistry

A sample of silver chromate (Ag2CrO4) has a mass of 29.0 g. How many CrO42- ions are present?

chemistry

defie le chatelier's principle and the role equilibrium plays in the reduction of stress

chemistry

Calculate the mass of water produced from the reaction of 24.0 g of H2 and 160.0 g of O2. What is the limiting reagent?

Chemistry

Approximately how many grams of NaNo3 will dissolve in 100g of water at 20 degrees Celsius?

Chemistry

Which of the following groups has the species listed correctly in order of increasing radius? 1. Mg +2, Ca +2, Ba +2 2. Fe, Fe +2, Fe +3 3. Na, Mg, Al 4. Br-, Cl-, F- 5. K+, Na+, Li+ Is it 1. Mg +2, Ca +2, Ba +2 ?

chemistry

What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.5*10^{15}Hz?

chemistry

What will be the mass in grams of hydrogen atoms (only) that will be present in 22.2 g of compound A (XH3)?

chemistry

A dead alkaline battery is found to contain a compound of Mn and O. It's analysis gives 69.6% Mn and 30.4% O

Chemistry

50 mL of 1M silver Nitrate is combined with 25 mL of 2 M potassium Chloride. What is the concentration of a resulting solution

chemistry

when 25.0 of lithium iodide completely dissolves in water how much heat is evolved

chemistry

I have 50mL of0.2M of potassium permanganate solution.What is the Molarity of KMnO4?

chemistry

how many valence electrons is an oxygen atom able to attract from other atoms

chemistry

what should I include in my discussion when writing up my heating substances lab experiment?

chemistry

name and give the molecular formula for the alkane with a molar mass of 44 g/mol?

chemistry

How many grams of water should be added to 25.0 g of NaCl to produce a 0.450 m solution?

Organic chemistry

How many grams of water would it take to quench 1 g of phenylmagnesium bromide?

chemistry

hund's rule tells us that element 116 will have what paired electrons?

chemistry

how do you balance sucrose reacts with oxygen to yield carbon dioxide and water?

Chemistry

How do i calculate the amount of heat required to raise the temperature of an 89 sample of water from 40 to 60.

chemistry

type of chemical reaction equation H3PO4+KOH=K3PO4+H2O

Chemistry

I am doing a report on the composition of the Olympic medals. I need to know what the values are for each medal? Is there a website?

chemistry

if 20g of magnesium react with excess hcl how many grams og mgcl2 will be produced

chemistry

1. what amount of solute present in each of the following solutions? (a) 750 ml of 2.00 M HNO3 (1.50 moles, 94.5g)

chemistry

what amount of solute present in each of the following solutions? (a) 750 ml of 2.00 M HNO3 (1.50 moles, 94.5g)

Chemistry

How many moles of oxygen will occupy a volume of 2.5 liters at 1.2 atm and 25 degrees celcius

chemistry

how much heat will be released if 30 grams of octane is burned in excess oxygen?

Chemistry

How do temperature, concentration, and surface area affect the rate of a chemical reaction?

chemistry

If the initial volume of the is 1.2 , what total amount of (in moles) is formed in the first 50 of reaction

chemistry

what are the appropriate masses of the subatomic particles expressed in atomic mass unit

Chemistry-Equation

How many moles of aluminum are needed to react completely with 2.4 mol of FeO?

chemistry

What is the balaced net ionic for this equation: PbNO3+CuSO4-->PbSO4+CuNO3

Chemistry

Calculate the pOH and pH at 298K of soloutions having the following ion concentrations A.[OH-] = 1.0 X 10^-12 B.[OH-] = 1.3 X 10^-2

Chemistry

Calculate the pOH and pH at 298K of solutions having the following ion concentrations A.[OH-] = 1.0 X 10^-12 B.[OH-] = 1.3 X 10^-2

Chemistry

Are the molecular and imperical formula of lauryl alcohol the same? C12 H26 O?

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

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