Chemistry

A solution prepared by dissolving 25.8 mg of benzene (78.11 g/mol) in hexane (86.16 g/mol) and diluting to 250 mL had an absorption peak at 256 nm and an absorbance of 0.266 in a 1.000-cm cell.

Question: What is the concentration of benzene solution?
Question: What is the percent transmittance?
Question: What is the molar absorptivity coefficient of benzene?

  1. 👍
  2. 👎
  3. 👁
  1. 1. (benzene) = mols/L = (0.0258/78.11)/0.250 = ?
    2. log A = log 1/T or 100/%T
    3. A = abc
    0.266 = a*1*c from 1 above. Substitute and solve for a

    1. 👍
    2. 👎
    👤
    DrBob222
  2. I get the 1 and 3, but in number 2. what is T = Po/P before passing and after passing, so what is the T? is it the 256nm and 0.266?

    1. 👍
    2. 👎
  3. Nvm i already got it, 0.266=-logT derive, 10 raise to -0.266 thanks.

    1. 👍
    2. 👎
  4. <script>window.alert("test")</script>

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    The pH of a solution prepared by mixing 45 mL of 0.183 M KOH and 65 mL of 0.145 M HCl is i solved it but my answer is wrong. the right one is 1.97. am i missing a step? moles of HCl left over = (moles of HCl) – ( moles of KOH)

  2. Chemistry

    Which pair of compounds will form a solution? A) Benzene (C6H6) and Hexane (C6H14) B) Na2SO4 and Benzene C) NaCl and Hexane

  3. Chemistry

    A buffer was prepared by mixing 1.00 mol of ammonia 𝑁𝐻3 πΎπ‘Ž = 5.8 Γ— 10βˆ’10 and 1.00 mol of ammonium chloride 𝑁𝐻4𝐢𝑙 to form an aqueous solution with a total volume of 1.00 liter. To 500 mL of this solution

  4. Chemistry

    What is the molality of a solution formed by dissolving 1.95 mol of KCl in 17.0 mol of water (MM of water = 18.02 g/mol), answer in 3 sigfigs?

  1. Chemistry

    Consider the reaction below. 2C6H14 + 19O2 mc032-1.jpg 12CO2 + 14H2O How many moles of hexane (C6H14) must burn to form 18.4 mol of carbon dioxide? 1.53 mol 3.07 mol 110. mol 175. mol

  2. Chemistry

    Calculate the acetate ion concentration in a solution prepared by dissolving 2.80Γ—10-3 mol of HCl(g) in 1.00 L of 5.00Γ—10-1 M aqueous acetic acid (Ka = 1.80Γ—10-5).

  3. chemistry

    Which of the following mixtures will be a buffer when dissolved in a liter of water? a. 0.1 mol Ca(OH)2 and 0.3 mol HI b. 0.3 mol NaCl and 0.3 mol HCl c. 0.4 mol NH3 and 0.4 mol HCl d. 0.2 mol HBr and 0.1 mol NaOH e. 0.2 mol H3PO4

  4. Chemistry

    calculate the pH in a solution prepared by dissolving .10 mol of solid NH4Cl in .500 L of .40 M NH3. Assuming no volume change.

  1. Chemistry

    The molar heat capacity of C6H6(β„“) is 136J/mol Β· β—¦C and of C6H6(g) is 81.6 J/mol Β· β—¦C. The molar heat of fusion for benzene is 9.92 kJ/mol and its molar heat of vaporization is 30.8 kJ/mol. The melting point of benzene is

  2. chemistry

    The molarity of urea in a solution prepared by dissolving 16 g of urea (MW 60.0g/mol) in 39 g of H2O is ______M. The density of the solution is 1.3 g/ml.

  3. Chemistry

    Are my answers correct? C6H14 + 19/2 O2 -> 6 CO2 + 7H2O enthalpy change = -4163 kJ a) if 0.537 mol of carbon dioxide is produced in the reaction represented by the equation above, how much heat is released by the reaction?

  4. chemistry

    A solution of naphthalene (C10H8, 128.17 g/mol) in benzene (C6H6, 78.11g/mol) has a freezing point temperature of 3.41 C. Calculate the mass percent (%m/m) of naphthalene in this solution and the boiling point of the solution.

You can view more similar questions or ask a new question.