Lv 1105 points

Esmeralda

Favourite answers0%
Answers6
Questions6
  • Chemistry?

    002 (part 2 of 2) 10.0 points

    Balance the equation by using oxidation and

    reduction half reactions. What is smallest

    possible integer coefficient of H3AsO4 in the

    combined balanced equation?

    As2S3(s) + NO3-(aq) → 

    H3AsO4(aq) + S(s) + NO(g)

    1 AnswerChemistry5 months ago
  • Please help chemistry?

    Determine the emf for the cell

    Pt(s)| H2(g, 2 bar)| H

    +(pH = 3.5)||

    Cl−(aq, 0.75 M)| Hg2Cl2(s)| Hg(ℓ)

    if the standard cell emf is 0.27 V at the cathode and 0 V at the anode.

    Answer in units of V.

    Chemistry5 months ago
  • Chemistry?

    Determine the emf for the cell

    Pt(s)| H2(g, 2 bar)| H

    +(pH = 3.5)||

    Cl−(aq, 0.75 M)| Hg2Cl2(s)| Hg(ℓ)

    if the standard cell emf is 0.27 V at the cathode and 0 V at the anode.

    Answer in units of V

    Chemistry5 months ago
  • Chemistry?

    A 0.478 g sample of a compound containing

    only C and H was burned in an attempt to

    determine its simplest formula. 1.50 g of CO2

    and 0.615 g of H2O were collected. Find the

    simplest formula for the compound.

    1 AnswerChemistry7 months ago
  • Chemistry?

    A 15.7 g sample of krypton exerts a pressure

    of 100 mTorr at 50◦C. What is the volume of

    the container?

    Answer in units of L.

    2 AnswersChemistry9 months ago
  • Chemistry?

    A 3.1 µL ampoule of xenon has a pressure of

    1 Torr at 10 ◦C. How many Xe atoms are

    present?

    Answer in units of atoms.

    1 AnswerChemistry9 months ago
  • Chemistry?

    A 134 mL flask contains argon at 1.2 atm and

    66 ◦C. What amount of Ar is present?

    Answer in units of mol.

    2 AnswersChemistry9 months ago
  • Chemistry?

    A student is given a gaseous sample of an unknown hydrocarbon. To measure the molar

    mass of the compound, the student uses an effusion apparatus. When methane was placed

    in the apparatus, it was found that 2.334 g of

    it effused in a period of 3.3 h at room temperature. Under identical conditions, 2.872 g of

    the unknown effused. What is the molar mass

    of the unknown?

    Answer in units of g/mol.

    1 AnswerChemistry9 months ago
  • Ideal Gas Chemistry?

    An apparatus consists of a 2 L flask containing

    nitrogen gas at 28◦C and 812 kPa, joined by

    a valve to a 14 L flask containing argon gas

    at 28◦C and 51 kPa. The valve is opened and

    the gases mix. What is the partial pressure of

    nitrogen after mixing?

    Answer in unit kPa.Please include equation used

    3 AnswersChemistry9 months ago