Chemistry

posted by .

3. A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon?

4. A 1.00 g Sample of C7H603 (s), us completely burned in a bomb calorimeter assembly by a temperature increase of 5.80 C is noted. when the calorimeter absorbs 9.37 Kj of heat, its temperature increases by 2.48 C.

-what is the heat capicity of the calorimeter?

- what is the amount of heat given off when 1 mole of C7H6O3 (s) burned? (use qcal= C cal x delta T cal)

5. given that

N2 05 + H2O (l) ---> 2HNO3 (l) delta H = -73.7 KJ

2H2 (g) + 02 (G) ---> 2H2O (L) delta H = -571. 6 KJ

N2 (g) + 3O2 (g) + H2 (g) ---> 2HNO3 (L) delta H = -348.2 KJ

Calculate delta H final (standard enthalpy of formation) if dinitrogen pentoxide gas.

6. A gass effuse 1.55 times fatser than propane C3H8 (g) at the same temperature and pressure.

- is the gas heavier or lighter than propane?

- what is he molar mass of this gas?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    in an experiment a sample of hydrocarbon was analyzed. The sample contained6 g of carbon and 1.344 g Hydrogen. a) whats the empirical formula?
  2. chemistry

    1. Nitrogen gas and sodium liquid are produced by the decomposition of sodium azide NaN3 (s). what volume of nitrogen gas, measured at 25 C and 0.980 atm, is produced by the decomposition of 62.5 g of sodium azide?
  3. chemistry

    a flask with a volume of 267.5 mL contains a few milliliters of a volatile hydrocarbon. after vaporizing the gas at 100 degrees C, the flask is weighed and found to contain 0.728 grams of hydrocarbon vapor at 755 mmHg. a separate combustion …
  4. Chemisty!

    a flask with a volume of 267.5 mL contains a few milliliters of a volatile hydrocarbon. after vaporizing the gas at 100 degrees C, the flask is weighed and found to contain 0.728 grams of hydrocarbon vapor at 755 mmHg. a separate combustion …
  5. Chemistry

    A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon?
  6. chemistry

    complete combustion of a 0.0100mol sample of hydrocarbon, CxHy, gives 1.344 L of CO2 at STP and 0.720 g of H2O. a. what is the molecular formula of hydrocarbon?
  7. Chemistry

    A .7178 g sample of a hydrocarbon occupies a volume of 390.7 mL at 65C and 99.2kpa. When the sample is burned in excess oxygen, 2.4267 g CO2 and .4967g H2O are obtained. What is the molecular formula of the hydrocarbon?
  8. chemistry

    Consider a sample of a hydrocarbon (a compound consisting of only carbon and hydrogen) at 0.959 atm and 298 K. Upon combusting the entire sample in oxygen, you collect a mixture of gaseous carbon dioxide and water vapor at 0.755 atm …
  9. chemistry

    a hydrocarbon was burnt completely and the products were bubbled into excess of Ca(OH)2 solution. The resulting mixture was filtered, and the residue dried and weighed. The mass of the hydrocarbon was found to be 10.00g. In a separate …
  10. chem

    When 3.517 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 11.59 grams of CO2 and 3.164 grams of H2O were produced. In a separate experiment, the molar mass of the compound was found to be 40.06 g/mol. …

More Similar Questions