Posted by Kaye on Tuesday, January 18, 2011 at 6:05pm.
The rusting of iron is represented by the equation 4Fe +3O2 > 2Fe2O3. If you have a 1.50mol sample of iron, how many moles of Fe2O3 will there be after the iron has rusted completely?
a. 0.50 mol
b. 0.75 mol
c. 1.0 mol
d. 1.50 mol
e. 2.0 mol
> I got "b" using ratios..is that correct?

Chemistry e  DrBob222, Tuesday, January 18, 2011 at 10:28pm
Look at the equation.
The equation tells us that 4 moles Fe will produce 1 moles of the oxide; therefore, 1.5 mol will produce 1/2 that or 0.75 mol which is answer b.

Chemistry e  Kaye, Tuesday, January 18, 2011 at 11:04pm
Thank you very much!
I tried answering this one but I am getting answers that are not in the 4 choices given...Help?
8. The balanced equation P4 (s) + 6H2 (g) > 4PH3 tells us that 2 mol H2
a. reacts with 1 mol 4
b. produces 4 mol PH3
c. cannot react with phosphorus
d. produces 2 mol PH3
e. reacts with 2 mol P4
Answer This Question
Related Questions
 chemistry  The rusting of iron is represented by the equation 4Fe + 3O2 2Fe2O3...
 chemistry  the rusting of iron is represented by the eqquation 4Fe + 3O2 >...
 Chemistry  The rusting of iron is represented by the equation 4Fe+3O2=2Fe2O. A ...
 Chemistry  When iron rusts in air, iron (III) oxide is produced. How many moles...
 chemistry  when iron rusts in air, iron(III) oxide is produced. how many moles ...
 chemistry  Am I correct? Deterioration of buildings, bridges, and other ...
 chemistry  Deterioration of buildings, bridges, and other structures through ...
 Chemistry  4Fe + 3O2 > 2Fe2O3 + 1.65E3 kJ C) what is the enthalpy change ...
 Chemistry  4Fe + 3O2 > 2Fe2O3 + 1.65E3 kJ C) what is the enthalpy change ...
 Chemistry  This isn't exactly a homework question, I'm just trying to ...
More Related Questions