Question
Hydrogen Peroxide decomposes to produce oxygen gas and water, What mass of hydrogen peroxide (H2O2) nust decompose to produce 0.77 grams of water?
Answers
Just follow the steps in this worked example.
http://www.jiskha.com/science/chemistry/stoichiometry.html
http://www.jiskha.com/science/chemistry/stoichiometry.html
1. Write a balanced equation :
2H^2O^2---O^2+ 2H^2O
2. Find the molar mass (g/mol) of each:
34.02 32.00 18.02
3. Divide grams water by the molar mass of water:
.77g (1mol/18.02g) ~ .0427 mols
4. Use the mole ratios to find the number of hydrogen peroxide moles:
2H^2O^2---O^2+ 2H^2O; they are the same.
5. Multiply moles by molar mass of hydrogen peroxide.
.0427 mol (34.02g/1mol)
6. Answer
1.454g H^2O^2
2H^2O^2---O^2+ 2H^2O
2. Find the molar mass (g/mol) of each:
34.02 32.00 18.02
3. Divide grams water by the molar mass of water:
.77g (1mol/18.02g) ~ .0427 mols
4. Use the mole ratios to find the number of hydrogen peroxide moles:
2H^2O^2---O^2+ 2H^2O; they are the same.
5. Multiply moles by molar mass of hydrogen peroxide.
.0427 mol (34.02g/1mol)
6. Answer
1.454g H^2O^2
thanks bae
Related Questions
Hydrogen peroxide(H2O2) slowly decomposes to form water and oxygen gas. Calculate the mass of Hydrog...
Hydrogen peroxide, H2O2, is unstable under certain conditions and decomposes as follows:
2 H2O2...
The disinfectant hydrogen peroxide (H2O2)
decomposes to form water and oxygen gas.
How much O2 wil...