What mass of O2, in grams, is required to completely react with 0.025 g C3H8?

Question

anonymous · Answer

MEDALS WILL BE REWARDED!
The molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of C3H8 is 44.1 g/mol. What mass of O2, in grams, is required to completely react with 0.025 g C3H8?

0.018
0.034
0.045
0.091

abmon98 · Answer

C3H8+5O2-->3CO2+4H2O
Number of Moles=Mass(g)/Molar Mass(g/mol)
0.025/(12*3)+(8*1)
=0.00056818181 moles of C3H8
Look at the mole ratio of C3H8 to O2
1:5 
0.00056818181:x 
x moles is obtained by multiplying by 5 and dividing by 1 
0.00284090909 moles of oxygen
Molar Mass*Number of Moles=Mass
0.00284090909*(16*2)=Mass
0.00284090909*32=Mass

abmon98 · Answer

So o go with the last choice 0.091

anonymous · Answer

Good Job Abmon98

abmon98 · Answer

Thanks @Katiria12 :)

anonymous · Answer

you're welcome @Abmon98 ;)