Physical Chemistry

posted by Anonymous

What is the mole fraction of alanine in 0.314m CH3CH(NH2)COOH(aq)?

  1. Anonymous

    0.314 m means 0.314 mol alanine in 1000g of water.
    moles = (1000g)/(18.02 g/mol H20) = 55.56 mol

    mole fraction (Xa) = moles of a/total moles
    mole fraction Alanine = (0.314)/(0.314+55.56)

Respond to this Question

First Name

Your Answer

Similar Questions

  1. chemistry

    At ph of 12 what charged groups would be present on glycine I said a NH2+ and coo- because a base accepts protons. Thank you I am not an organic chemist; however, I wonder, at a pH of 12, how there would be sufficient H^+ to form the …
  2. Organic Chemistry

    We've been working on extraction of known/unknown compound mixtures lately, and we have to give equations for the acid-base reactions that occurs between HCl, NaOh and (a) R-COOH (b) R-NH2, and (c) Neutral compounds (naphthalene and …
  3. Chemistry

    Could you help me with these Directions: Either it's a carboyhdrate, lipid, protein, nucleic acid It's monomers contain NH2 amd COOH groups Controls cell reproduction and activities Ratio of hydrogen to oxygen is 2:1 Is held together …
  4. organic chemistry

    Explain why Grignard reagent cannot be prepared from an organic halide that contains a hydroxyl (-OH), a carboxyl (-COOH), a thiol (-SH), or an amino (-NH2 or -NH) group.
  5. chemistry

    1. All of the following are structural isomers of CH2=CHCH2CH=CHCH3 EXCEPT a. CH2=CHCH2CH2CH=CH2 b. CH3CH=CHCH2CH=CH2 c. CH3CH=CHCH=CHCH3 d. CH2=C=CHCH2CH2CH3 Is it D?
  6. chemistry

    Which of the following solutes dissolved in 1000 g of water would provide a solution with the LOWEST freezing point?
  7. biochemistry

    can alanine at ph 7 have a carboxyl group (-COOH) and the amino group (-NH2)?
  8. Chemistry

    One chirality of CH3CHCICOOH is shown below. COOH | C H3C/ \CI - - - H Identify the image(s) below that excibit the opposite chirality. Select all that apply. (a) COOH (b) H | | C C _ | _ / \ _ | _ H3C CI _ | _ _ _ | _ _ CI | CH3 _ …
  9. chemistry

    Which of the following acids is expected to be the strongest acid?
  10. Chemistry

    The thermochemical equation which is associated with ∆H°f, the standard enthalpy of formation, for urea, CO(NH2)2 (s), is: CO (g) + 2NH3 (g) --> CO(NH2)2 (s) + H2 (g) CO (g) + 2H2 (g) + N2 (g) --> CO(NH2)2 (s) C (s) + …

More Similar Questions