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..
Â Â 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)

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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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