chemistry

A compound has the empirical formula CH2O. When 0.0866 g is dissolved in 1.0 g of ether, the solution’s boiling pint is 36.5oC. Determine the molecular formula of this substance

  1. 👍 0
  2. 👎 0
  3. 👁 195
asked by Danica
  1. Look up the normal boiling point of ether. Then delta T is difference between normal boiling point and 36.5.
    delta T = Kf*m
    Substitute and solve for m = molality.

    Molality = mols/kg solvent. 1g ether = 0.001 kg. Solve for mols.

    Then mols = grams/molar mass. You know mols and grams, solve for molar mass.

    Finally, molar mass/empirical mass = some number. Round to the nearest whole number which I'll call n and apply to this.
    (CH2O)n

    1. 👍 0
    2. 👎 0
    posted by DrBob222

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry (Check)

    True or False The empirical formula of a compound is always the same as the molecular compound. My Answear: True The empirical formula for acetylene is CH. The molecular formula is C2H2. Another example: The empirical formula for

    asked by Bryan on February 4, 2007
  2. chemistry

    In the course of research, a chemist isolates a new compound with an empirical formula C3H3O2. 4.97 g of the compound when dissolved in 100. g of water produces a solution with a freezing point of −0.325°C. What is the

    asked by Diana on September 8, 2010
  3. chemistry

    If a compound's empirical formula is CH2O and its' formula mass is 120.12 amu, what is its' molecular formula

    asked by nick on December 13, 2009
  4. st.joseph science

    Calculate the molecular formula of a compound whose empirical formula is CH2O AND vapour density is 30

    asked by deepika on June 15, 2016
  5. Chemistry

    Please check my answers for the following questions. THANK YOU. 1) The empirical formula of a compound that is 25.9% nitrogen and 74.1% oxygen is.... ANSWER: N2O 2) empirical formula of a compound that consists of 4.80 grams of

    asked by anonymous on August 2, 2007
  6. Chemistry-DrBob222

    A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0

    asked by Patrick on January 17, 2011
  7. Chemistry

    See bottom Patrick A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are

    asked by Patrick on January 17, 2011
  8. Chemistry

    The empirical formula of a compound is CH2O and the molecular mass is 180. What is the molecular formula of the compound?

    asked by Haley on December 14, 2010
  9. Chemistry (Check)

    Classify each of these statements as always true, sometimes true, or never true. 7____AT____It is necessary to know the formula of a compound in order to calculate its percent composition. 8___ST_____If the percent by mass of

    asked by Bryan on February 11, 2007
  10. chemistry

    1.to calculate the percent by massof an element in a known compound, divide the mass of the element in one mole by the _______and multiply by 100%. A(n) _______formula represents the lowest________ratio of the elements in a

    asked by Anonymous on March 24, 2009

More Similar Questions