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1. How many grams of F2 must react with NaCl in the following reaction if 800 kJ of energy are released? 2NaCl + F2 --> 2NaF + Cl2, ΔH = -320 kJ

A. 47.5

B. 95.0

C. 40.0

D. 125

E. 190

2. Consider the following reaction: 2C3H8 --> C6H6 + 5H2, ΔH = +698 kJ.

Several of these ingredients were mixed and 3141 kJ of energy was released.. Was the reaction proceeding in the forward or backward direction? How many moles of hydrogen gas were released or consumed?

A. forward, 22.5

B. backward, 4.5

C. forward, 1.11

D. backward, 1.11

E. backward, 22.5

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Category:- Chemistry
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