Acommercial hand warmer contains 100 grams of iron and warms according to the thermochemistry equation below. if the oxygen is in excess, how much heat (q) will the hand warmer produce when all of the iron is oxidized (molar mass fe = 55.8g/mol

-736.738 KJ/mol.

Explanation:

4Fe + 3O₂ → 2Fe₂O₃, ΔH°f = -822.2 KJ/mol.

4.0 moles of Fe → 2.0 moles of Fe₂O₃

1.79 moles of Fe → ??? moles of Fe₂O₃

Using cross multiplication:

The production of 1.0 mole of Fe₂O₃ → -822.2 KJ/mol

The production of 0.896 mole of Fe₂O₃ → KJ/mol

samuel de champlain. in 1608, king henry iv sponsored pierre dugua, sieur de mons and samuel de champlain as founders of the city of quebec with 28 men. this was the second permanent french settlement in the colony of canada.

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i