1. What mass of methane could be produced from 10 grams of hydrogen?

3. What mass of methane could be produced from 10 grams of hydrogen?
Five steps to the answer
[1] produce a balanced equation
2H2 + C  CH4
[2] Identify frog path

5. [3] convert mass of reactant to moles of reactant
Moles = Mig
GFm
Moles = 10g
2g/mol
= 5 moles

6. Moles X = Mole Y Coeff X Coeff Y
[4] use the mole ratio from the balanced equation to convert moles of reactant to moles of product
2H2 + C  1CH4
So 5 moles of H2 = 2.5 moles of CH4
Moles X = Mole Y
Coeff X Coeff Y

7. Step 5
Covert moles of product to mass of product
Moles = mass in grams
RMM
mass in grams =Moles x GFM
= 2.5 x 16
= 40grams of CH4

8. Mass in grams Mass in grams Moles Moles Volume of gas Volume of gas
This side is given in the problem
This side is asked for by the problem
Mass in grams
Mass in grams
Divide by molar mass
Multiply by molar mass
Use molar ratio from the balanced equation
Moles
Moles
Volume of gas
Volume of gas
# of particles
# of particles

9. Key take away:
Process =
Reactants
Mass  Mole Products
Mole  Mole
Mole  mass

10. WWWWE DO!
C8H O2  CO H2O