CHEMISTRY (WEBWORK)

59,293 results, page 83

  1. Chemistry

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

  2. chemistry

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

  3. Chemistry

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

  4. chemistry

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

  5. Organic Chemistry

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

  7. Chemistry

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

  8. chemistry

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

  9. chemistry

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

  10. chemistry

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

  11. chemistry

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

  12. 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)?

  13. Chemistry

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

  14. Chemistry

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

  15. chemistry

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

  16. Chemistry

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

  18. 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

  19. 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

  20. chemistry

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

  21. 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?

  22. Chemistry

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

  23. Chemistry

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

  24. 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?

  25. chemistry

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

  26. chemistry

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

  27. chemistry

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

  29. chemistry

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

  30. chemistry

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

  31. 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?

  32. Chemistry

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

  33. 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 ?

  34. chemistry

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

  35. chemistry

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

  36. 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

  37. 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

  38. chemistry

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

  40. chemistry

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

  41. chemistry

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

  42. chemistry

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

  43. chemistry

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

  44. chemistry

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

  45. Organic chemistry

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

  46. chemistry

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

  47. chemistry

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

  48. Chemistry

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

  49. chemistry

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

  51. 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?

  52. chemistry

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

  53. 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)

  54. 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)

  55. Chemistry

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

  56. chemistry

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

  57. Chemistry

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

  58. chemistry

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

  59. chemistry

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

  60. Chemistry-Equation

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

  62. chemistry

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

  63. 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

  64. 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

  65. Chemistry

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

  66. chemistry

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

  67. chemistry

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

  68. chemistry

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

  69. Chemistry

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

  70. chemistry

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

  71. Organic Chemistry

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

  73. chemistry

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

  74. chemistry

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

  75. Chemistry

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

  76. chemistry

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

  77. 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.

  78. Chemistry

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

  79. Chemistry

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

  80. Chemistry

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

  81. chemistry

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

  82. Chemistry

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

  84. chemistry

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

  85. Organic chemistry

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

  86. 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)-->

  87. 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?

  88. 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?

  89. 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?

  90. Chemistry

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

  91. chemistry

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

  92. 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?

  93. chemistry

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

  95. Chemistry

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

  96. chemistry

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

  97. Chemistry

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

  98. chemistry

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

  99. Chemistry

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

  100. chemistry

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

  101. organic chemistry

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

  102. chemistry

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

  103. 7th grade chemistry

    how is potassium sulfate prepared?explain with chemical reaction.

  104. chemistry

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

  106. chemistry

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

  107. Chemistry

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

  108. chemistry

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

  109. chemistry

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

  110. chemistry

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