chemistry

posted by .

How many grams of oxygen are needed to burn 22.8 grams of C8H18?
80.0 g
240. g
40.0 g
20.0 g
120. g

  • chemistry -

    depends on the reaction. Is it

    2C8H18 + 9O2 = 16C + 18H2O ?

    If so, since you have 22.8/114 = 0.2 moles of C8H18, you will need 9/2*.2 = 0.9 moles of O2, or 28.8g

    nope. So, Fix the reaction and adjust the moles of O2 needed.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Calculate the mass (in grams) of water vapor produced when 56.0 grams of pure hydrogen gas burn in the air. Given the information from that, calculate the mass of oxygen gas that would be needed to burn 100 grams of hydrogen gas.
  2. chemistry

    Calculate the mass (in grams) of water vapor produced when 56.0 grams of pure hydrogen gas burn in the air. Given the information from that, calculate the mass of oxygen gas that would be needed to burn 100 grams of hydrogen gas.
  3. Chemistry

    How many grams of carbon dioxide will be made when 100 grams of methane burn in an excess of oxygen
  4. chem

    The complete combustion of octane, C8H18, the main component of gasoline, proceeds as follows. 2 C8H18(l) + 25 O2(g) ¨ 16 CO2(g) + 18 H2O(g) Octane has a density of 0.692 g/mL at 20‹C. How many grams of O2 are required to burn …
  5. chemistry

    how many grams of oxygen is needed to burn 500 grams of pentane?
  6. Chemistry

    #5 Limiting Reactants How many grams of water will be produced in the complete combustion of 20.0 grams of Octane, C8H18(g) and 50.0 grams Oxygen gas?
  7. Chemistry

    When 50 grams of hydrocarbon X are burned with oxygen the products are carbon dioxide and water. If 65 grams of water and 100 grams of carbon dioxide are produced, how many grams of oxygen were needed for the reaction?
  8. Chemistry

    CH4 + 2O2 --> CO2 + 2H2O a. How many grams of methane are needed to produce 1.5 X 10^-2 grams of carbon dioxide?
  9. Chemistry

    CH4 + 2O2 --> CO2 + 2H2O a. How many grams of methane are needed to produce 1.5 X 10^-2 grams of carbon dioxide?
  10. Chemistry

    CH4 + 2O2 --> CO2 + 2H2O a. How many grams of methane are needed to produce 1.5 X 10^-2 grams of carbon dioxide?

More Similar Questions