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  3. 3. considering the reaction: 2fe2o3 + 3c --> 4f

3. Considering the reaction: 2Fe2O3 + 3C --> 4Fe + 3CO2 A. How many moles of C...

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Chemistry

3. Considering the reaction:
2Fe2O3 + 3C --> 4Fe + 3CO2

A. How many moles of C are needed to react with 6.00 moles ofFe203

B. How many grams of Fe result when 175g ofFe2O3 react?

4. Using the bond energies below determine the value and sign ofdelta H for..
   H-S-H + Cl-Cl --> Cl-S-Cl + H-H

Bond energies in kJ/mol:
H-S 365 Cl-Cl 240 Cl-S 255 H-H 432

5. Will a 1.0m solution of ZnCl2 in water have thesame freezing temperature as..
A. 1.0m solution of NaCl in water? Give a reason for youranswer.

7. Al metal has a specific heat of 0.880 J/gram-degree C. How manyjoules of heat are needed to heat 562g of Al from 25.0 degrees C to95.0 degrees C?

8. The enthalpy of combustion of C2H6 is 1541kJ/mole. How many kJ of heat results when 775 grams ofC2H6 are combusted?

9. Explain why although both NaCl and sucrose,C12H22O11, are soluble in waterone of their solutions conducts electricity, but the other doesnot.

10. A sample of a hydrate of NiCl2 weighing 0.235 gramsis heated to drive off the water leaving a weight of 0.128 grams.What is the formula for the hydrate? i.e What is the value of X inNiCl2(XH20)

Answer & Explanation Solved by verified expert
4.2 Ratings (727 Votes)
3 2Fe2O3 3C 4Fe 3CO2 Fe2O3 C reacts in the molar ratio of 23 Thus for 6 moles of Fe2O3 moles of C required 362 9 moles Now molar mass of Fe2O3 160 gmole Thus moles of Fe2O3 in 175 g of it    See Answer
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