chemistry! URGENT

61,858 results, page 66
  1. Chemistry

    what is the percent by mass of nitrogen in (NH4)2CO3? how do you do this ?
  2. chemistry

    if 5g of CH3COOH reacts how many moles of CO2 will be produced?
  3. chemistry

    solve the following and express your answer in scientific notation: (5.3 x 10^4) + (1.3 x 10^3) A. 5.4 X 10^4 B. 5.4 X 10^8 C. 6.6 X 10^7 D. 6.9 X 10^7 I say c
  4. chemistry

    how to determine the oxalate and copper in K[Cu(C2O4)2].2H2O
  5. Chemistry

    If 23.7g of C8H18 are combusted, what mass of water will be produced?
  6. Chemistry Help Please

    Which of the following is the strongest reducing agent? a) Li+ b) Zn c) Sn d) H2 Is it Li? Can someone please explain what the answer is and why?
  7. chemistry

    How do u solve this calculate the mass of (NH4)2SO4 if 16 g H is used
  8. college

    here is a chemistry 10 quetion. Convert 35.2mL to hm to third power
  9. Chemistry

    The pressure exerted by a gas in a container depends on? and why?
  10. chemistry

    express the barometric pressure in atm. 30.09Hg
  11. chemistry

    What is the number of grams of a solute for a 3L of a 2.5 M HCl solution???
  12. Chemistry

    Do Ozone gas decomposite naturally under IR rays?
  13. chemistry

    What is the vapor pressure of (in ) at 18.5? Carbon disulfide, , has = 100 at -5.1 and = 28.0
  14. Chemistry

    what is the gram formula mass of CaSO4*2H20?
  15. chemistry

    Al2Br6, xpress your answer as a chemical formula?
  16. chemistry

    what substances can affect a waters boiling point? please help
  17. chemistry

    If you have 64.3 g NH3, how many grams of F2 are required for complete reaction?
  18. chemistry

    Match the elements to form ionic compounds. please help Cl Na Mg O Be S Li F
  19. Chemistry

    Why is the emperical formtlar of C3H6O2 multiplied by 2 when calculating?
  20. chemistry

    How many monosaccharides most likely make up this molecule: C 10H20 O10
  21. chemistry

    how is hydrogen both beneficial and detrimental on the human body. please help
  22. Chemistry

    how do I determine the Ka for an acid HX if th epH of a 1.00M solution of HX is 4.5
  23. Chemistry

    What is the volume, in liters, of 5.00 mols of carbon dioxide?
  24. Chemistry

    Rank the following atoms from highest to lowets energy: Ca, Be, Ba, C
  25. chemistry

    electrostatic interaction is important with what type of bond
  26. chemistry

    If isomers of an alkane have the same molecular formula, how do they differ?

    Which type of solid is predicted for HCl, Na, CaCl2???
  28. Chemistry

    Calculate the number of valence electrons in BF3.
  29. chemistry help plz

    OH-OH-benzene ring-CH=CH-NH2 is anyone knows the name of this compound?
  30. organic chemistry

    can a molecule act both as an electrophile & nucleophile?
  31. Chemistry

    Why is AgCl not soluble in nitric acid while Ag3PO4 is?
  32. chemistry

    how many grams of MgS would be needed if I had 3.8 moles of CaO?
  33. chemistry

    what is evidnece that cathode rays are part of matter?
  34. chemistry

    a pressure vessel contain a large volume of co2
  35. Chemistry

    Is thalidomide a cis isomer or a trans isomers? Thanks
  36. Chemistry

    what is the balanced equation for Sodium Hydroxide and Water
  37. Chemistry

    Is thalidomide a cis isomer or a trans isomers? Thanks
  38. chemistry

    what are the coordination numbers of Lithium,sodium,potassium?
  39. Chemistry

    Is thalidomide a cis isomer or a trans isomers? Thanks
  40. chemistry

    what difficulty must be overcome when mixing water and margarine? why?
  41. chemistry

    at STP, chlorine is a gas but bromine is a liquid. why is this?
  42. chemistry

    hi can someone please help me I need a detailed scientific article about ozone depletion thank you
  43. chemistry

    What is the purpose statement for the lab comparation titrations?
  44. Chemistry

    Sup fam, why is SO2 a stronger reducer than Cr3+?
  45. chemistry

    What is the pH of the solution created by combining 0.80 mL of the 0.10 M NaOH(aq)with 8.00 mL of the 0.10 M HC2H3O2(aq)?
  46. chemistry

    how many molecules are present in 1.2 mol of glucose, C6H12O6?
  47. Chemistry 3A

    how do i find the number of moles of oxygen atoms in: Al(OH)3
  48. chemistry

    what kind of hybridization exists for each carbon in the lattice?
  49. Chemistry

    Could someone tell me what the structural formula of the product between Hydroxyl and carboxylic is? Many thanks a^2+b^2=c^2 Thanks
  50. chemistry

    what is the temperature in degrees celsius that your silver becomes a gas?
  51. Chemistry

    convert: 450m/s to m/h? please show exact steps
  52. chemistry

    how do i convert 0.00183338433 g/mL to mM? and putting it in 4 significant numbers. thank u
  53. Chemistry

    What is the vapor pressure of CH4 at 1 atm and 298k?
  54. chemistry

    What is the vapor pressure of helium at 1 atm and 298 k?
  55. Chemistry

    Rank from longest to shortest bond length: Si-O, Si-H, Si-S
  56. Chemistry

    The nitrogen-containing bases in RNA have the abbreviations ____________________. A) A, G, C, U*** B) A, G, T C) A, G, U D) A, G, C, T E) A, G, T, U F) A, G, U, T
  57. chemistry

    sulfuryl cholorie decomposes toSo2 and cl2
  58. chemistry

    If the students added hcl instead of tetraoxosulphate(Vi)acid
  59. chemistry

    the oxidation number of Mn in MnO4- is +4 (true or false)
  60. chemistry

    What are ways of disposing concentrated sulpheric acid?
  61. chemistry

    what would happen if PbI2 were to be ingested into your blood stream?
  62. Chemistry

    why is da value of heat of neutralization of NaOH AND HF is higher than that of its constant value??
  63. Chemistry

    to prepare 50.0 g of 10% NaNo3 solution you will need how many grams of solute
  64. chemistry

    Which of the following gases effuses the fastest at a given temperature? Ne CH4 Ar H2
  65. chemistry

    how do you find the number of neutrons in an element's atom?
  66. chemistry

    how many grams of sodium chloride are there in 2.5 L of a 0.4% w/v solution?. need to know how to figure this out
  67. chemistry

    What is the type of glycosidic bond in case alpha?
  68. chemistry

    what is the residual entropy at T=0 k for 1 mol of C6H5Br Bromobenzene?
  69. chemistry

    Why does CdS dissolve in HCL, when CuS and Bi2S3 will not?
  70. Chemistry

    How to separate and isolate the components of barium sulfate?
  71. chemistry

    What are the number of atoms of nitrogen in 10g of N2H4?
  72. Chemistry

    how do i find which substances are most likely to obey raoult's law?
  73. Chemistry

    How many grams of NaOh are needed to prepare 0.5l of a 4m solution?
  74. Chemistry

    How many mmol are in a 615mL solution containing 5.53 ppm CaCo3
  75. chemistry

    calculate the number of moles in this quantity: 52.5 mg ZnCl2=?
  76. chemistry

    howto the answer arrived anyone explain pls.....
  77. chemistry

    Hi, Can anyone please tell me how to convert cm3 into litres? Thanks ;) worked it out! Cheers ;)
  78. chemistry

    which has more number of particles, 3g of acetone or 3g of acetic acid
  79. chemistry

    Identify the feature below using correct crystallographic notation.
  80. Chemistry

    2C6H6+X -> 12CO2+6H20 Find x Is x 30O?
  81. chemistry

    can fractional distillation be used to determine purity of a compound?
  82. Chemistry

    How many electrons are there in the unipositive ion of Cs-136 (#55)? How many neutrons?
  83. Chemistry

    the mass in grams of 125 ion atoms
  84. Chemistry

    How is strength different from concentration for acids and bases? please give an example.
  85. chemistry

    how do you find the number of neutrons in an element's atom?
  86. Chemistry

    Determine the enthalpy of the following reaction. 2M(s) + 3Cl2(g) ---> 2MCl3(s)
  87. Chemistry.

    How do I calculate the internuclear distances for KF, KCl, KI, and KBr?
  88. Chemistry

    Calculate the [H], [OH], pH and the pOH of this solution; 0.0025 M NaOH
  89. Chemistry

    What is the difference in alkane and Alkene functional group?
  90. Chemistry

    In most of its compounds, this element exists as a monatomic cation. 1. Br 2. N 3. Na 4. Cl 5. O Is it 3. Na ?
  91. chemistry

    water cannot cook beans on the moon.explain
  92. chemistry

    The oxidation number of sulphur in CuSO4.5H2O is ......
  93. Chemistry

    How many moles are contained in the following: a. 5.89 g KBr b. 5.3 kg NaCl c. 7.9 mg KNO3
  94. chemistry

    A scientist has 0.46 mL of a solution. How would she convert this volume to microliters?
  95. Chemistry

    Does CH2CH2CH2CH2CH2CH2CH2 represent the polymer segment polyethylene?
  96. Chemistry

    Estimate the value of deltaGf for COCl2(l) at 25 degrees celcius
  97. chemistry

    What is the number of grams of a solute for a 3L of a 2.5 M HCl solution???
  98. chemistry

    calculate the wavelength of an electron m=9.11 x 10^-28 g moving at 3.66x10^6 m/s
  99. chemistry

    why does zinc decompose when reacted with copper sulphate?
  100. chemistry

    How many grams are there in 2 moles of each of the following? A)Xe2 B)C6H12O6 C)CH3COOMg