CHEMISTRY (WEBWORK)

59,669 results, page 10

  1. chemistry

    what is mass
  2. chemistry?

    why does Si-28 contain 14 neutrons?
  3. chemistry

    What is periodicity.
  4. chemistry

    6.04g
  5. chemistry

    1000 mm = how many km
  6. chemistry

    what is the pH of .10 M NH4CL?
  7. science

    chemistry help
  8. Chemistry

    2.36 x 10^4 s= ? days
  9. Chemistry

    Dr Bob!! Need your help!!
  10. chemistry

    I say unsaturated. Am I right?
  11. chemistry

    I say unsaturated. Am I right?
  12. chemistry

    WHat is a precipitate?
  13. chemistry

    2 NO(g) + 1 O2(g) <==> 2 NO2(g)
  14. chemistry 12

    what is the relationship between ka and kb? Kw=ka*kb
  15. chemistry

    what is equillibrium?
  16. chemistry

    Your percent
  17. chemistry

    When is there a need to determine G? A. When H > 0 and S < 0 B. When H > 0 and S = 0 C. When H > 0 and S > 0 D. When H = 0 and S < 0
  18. Chemistry

    A 35g sample of Fe is dropped into 80g of water at 20 degrees Celsius. What is the final (equilibrium) temperature of the iron/water? This isn't really a chemistry problem. There will be no chemical reaction. It is a heat capacity (physics) problem. Use the specfic heats of ...
  19. Chemistry

    This is a problem I got on my Mastering Chemistry homework: Consider the following reaction: H2(g)+I2(g)⇌2HI(g) A reaction mixture at equilibrium at 175 K contains PH2=0.958atm, PI2=0.877atm, and PHI=0.020atm. A second reaction mixture, also at 175 K, contains PH2=PI2= 0...
  20. Chemistry

    I recently performed an experiment in which magnesium oxide formed. I have to find out the simplest whole number ratio of Mg atoms to O atoms. How do I go about doing this? * Chemistry - DrBob222, Tuesday, October 13, 2009 at 11:19pm Mass MgO - mass Mg initially = mass oxygen ...
  21. Chemistry

    How do you prepare 600.0mL of 0.48M Al(NO3)3*9H2O? Is this correct? 1. Measure out 71g of solution 2. Put approx. 300.0mL of water into container 3. Add the 71g of solution to the water and mix 4. Add more water until 600.0mL of solution is obtained 5. Mix •Chemistry - ...
  22. Chemistry

    I wrote an introduction for a lab report for the first time, and I was given no samples (my teacher said "feel free to ask your friends who had chemistry last semester if you can see their introductions... none of my friends took it last semester, so I have no one to ask; I ...
  23. Chemistry

    Really hard Chemistry question that I need help with. Any assistance would be really helpful.? When 0.5963g of a sample containing NaNO2 and some inert material is allowed to react with excess HSO3NH2, the volume of N2 gas produced is measured. The volume of N2 gas corrected ...
  24. Chemistry

    Atom-Particle that cannont be divided in half becasue it is in its smallest form. Reactants-Substances that exist before the reaction begins. Endothermic Reaction-take in, or absorb heat energy. Exothermic Reaction- Release Heat energy Inhibitor-makes a reaction slower. Rate ...
  25. Chemistry

    Take a look at the following uses of the term entropy by several historical figures: Anton Chekhov considered by some as being one of the greatest short story writers said, "Only entropy comes easy." Vaclav Havel, playwright and the first president of the Czech Republic said...
  26. chemistry

    At room temperature pure water has a density of 1.00 g/ mL. What mass of water (in grams) will fit into a container if 1.00 lb. of mercury completely fills the container? Okay, here is what I solved so far. Let's say H2o equals water and Hg equals mercury= 13.6g/mL. equals an ...
  27. Chemistry

    My chemistry is bad. I know these are very easy but I cannot solve them . 1. a) Prepare 200 ml of 2 M HCl solution from stock bottle containing 37% w/w HCl and d = 1.2 (g/ml). MWHCl = 36.5 g b) Calculate M of 37% w/w HCl solution? d= 1.2, then solve the above problem 2. a) ...
  28. math111

    in a science class,65 student study physics while 40 study chemistry.if there are 93 student in the class,how many student study both physics and chemistry?
  29. Chemistry

    Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) ¨ 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the reaction and calculate ...
  30. Chemistry

    is 2 physical? what's 3? I didn't quite get that right. It should be extensive and intensive properties. It is true that density is a physical property but I don't think that is 2. It is EITHER an intensive physical propery or an extensive physical property. Either intensive ...
  31. Science

    List all of the things that are physical property. You will find some listed here. http://nobel.scas.bcit.ca/chem0010/unit2/2.2_properties_physical.htm There are very many others, but they would require a lot of effort to explain what they mean. Isn't every property a physical...
  32. chemistry

    please can u help i need to a structure of a polymer and i dentify the monomer unit and include three monomer units,from the compound CH2=CH-CH-OH CH3 AND STATE THE POLYMERIZATION INVOLVED IN FORMING THE POLYMER,please help i have tried ,but i cant make head nor tail of it The...
  33. Chemistry

    General Chemistry 111 11/28/11 Chapter 9 Extra Credit Quiz Name: _____________________________ Section #______________________ Tetrahedral geometry has a bond angle of about 109.5 °. Given that a tetrahedron is made up of 4 equilateral triangles each of length x, what is the ...
  34. Chem

    A carless chemistry student pours 200 grams of methanol, a flammable substance into the sink. Another careless chemistry student causes the bad situation to get even worse by dropping a lit match into the sink. The metanol burns completely with 300 grams of oxygen from the air...
  35. chemistry

    [Ag]=3.41*10^-2 in Ag2CrO4 [CrO4]=?
  36. chemistry

    are these two statements true? (a/b)^x = a^x - b^x and (x^a + x^a+b) / (1+x^b) = x^a
  37. Chemistry

    1kpa to mmhg
  38. chemistry

    What is the pH, pOH and [OH-] of 0.06 mol/L HI(aq)?
  39. 11th grade

    what exactly is chemistry?
  40. chemistry

    Why is CO2 not ionic?
  41. chemistry

    What amount is a mol?
  42. chemistry

    What is the eq.wt of C7H6O3 and why ??😊
  43. chemistry

    what is the correct name for k2o
  44. Chemistry

    How to find [H3O+] when i have [OH-]?
  45. Chemistry

    How many moles are there in 0.7g of CFC's
  46. chemistry

    what is the solidification for water?
  47. Chemistry

    Just WHO IS DRBOB222? AND WHY ARE YOU SO AMAZING? PLEASE TELL US MORE ABOUT YOURSELF!
  48. Chemistry

    name the ions: Ag+ and P-3... and it's not silver..
  49. chemistry

    convert 5.98 x 10 to the 24th kg. to mg.
  50. chemistry

    why is it good to be a csi
  51. chemistry

    What is the pH of 0.10 M HNO2 given Ka = 4.5x10-4.
  52. chemistry

    what is the configuration of an electron
  53. chemistry

    what is the disadvantage of nh4oh
  54. ap chemistry

    how do you do an ice table?
  55. Chemistry

    Alternative answers: A)10 B)13 C)1.9 D)3.8 E)12
  56. chemistry

    What is the eq.wt of C7H6O3 and why ??😊
  57. chemistry

    C6H5NO2+? = C6H5N2Cl
  58. Chemistry

    How many cm3 are there in 1.0 litre?
  59. Chemistry

    What is the second electron affinity of Se? I believe the first is... Se- -> Se + e- The second.... Se -> Se+ + e-
  60. Chemistry

    What is the mass of 5mole of li(li=7)
  61. chemistry

    How do you tell what dyes are more polar than others?
  62. chemistry

    How many cm does it take to make 500ml
  63. chemistry

    How many cm does it take to make 500ml
  64. chemistry

    16.3g equals how many cg? someone helllllllllllp
  65. Chemistry

    349 kJ to joules
  66. Chemistry

    How many meters are there in one picometer?
  67. Chemistry

    What is the pH of a solution of NaOH 10^-12 M?
  68. chemistry

    conver 0.100Kg to g
  69. chemistry

    how to calculate persenteil
  70. chemistry

    conver 0.100Kg to g
  71. chemistry

    conver 0.100Kg to g
  72. Chemistry

    100.0cm3 of
  73. Chemistry

    what is electron configuration?
  74. chemistry

    how do you make soap
  75. Chemistry

    Why does O3 have a dipole moment?
  76. chemistry

    14.6 103 kJ to Cal
  77. chemistry

    f(x) = 2x - 1 g(x) = 5 - 3x Find (fog)(x)
  78. chemistry

    241 kJ to Calories how do i do this?
  79. Chemistry

    Why do ions form?
  80. Chemistry

    What is the numerical value of one mole?
  81. chemistry

    What are significant figures?
  82. Analaytical Chemistry

    ahhh
  83. chemistry

    does fire have matter?
  84. chemistry

    how many moles are in Fe2O3
  85. Please Help

    Can someone please help with the chemistry problems? I need them to study.
  86. chemistry

    What is equlibrium position
  87. Chemistry

    how do i name this chemical? S(ClO3)2
  88. Chemistry

    how do i name this chemical? Fe(NO3)2
  89. Chemistry

    NaHCO3 (s) + HC2H3O2 (aq) ---> ?
  90. chemistry

    what is electromagnetic radiation
  91. CHEMISTRY

    What is the name of 12H2O and 10 H2O?
  92. chemistry

    Al(NO3)3+ NaCl
  93. chemistry

    What is a saturated solution?
  94. Chemistry

    What is chemical name for Na2Cr2O2?
  95. chemistry

    how to draw 1,2 - diethyclyclohexane?
  96. chemistry

    how many grams are in 49.0 mL of NaOH
  97. chemistry

    sorry Ksp of PbCl2 is 1.6 x 10-5
  98. chemistry

    Why you did not use the 50 ml given in the problem instead you use 1000?
  99. chemistry

    what is the OH of a 0.025 M HF solution?
  100. Chemistry

    How do you calculate Cwater?
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