Asked by lorpu
What STP volume of oxygen gas is obtained from the electrolysis of 140.0mLof water? (Hint: The density of water is 1.00g/mL.)
Answers
Answered by
DrBob222
2H2O ==> 2H2 + O2
Use density to convert 140 mL H2O to grams.
Convert g H2O to mols. mols = grams/molar mass.
Use the coefficients in the balanced equation to convert mols H2O to mols O2.
Then L O2 = mols O2 x 22.4 L/mol
Use density to convert 140 mL H2O to grams.
Convert g H2O to mols. mols = grams/molar mass.
Use the coefficients in the balanced equation to convert mols H2O to mols O2.
Then L O2 = mols O2 x 22.4 L/mol