According to the Following Thermochemical Equation, What Mass of HF

question 90

Multiple Choice

According to the following thermochemical equation, what mass of HF (in g) must react to produce 345 kJ of energy? Assume excess SiO₂. SiO₂(s) + 4HF(g) → SiF₄(g) + 2H₂O(l) Δ_rH° = -184 kJ

• A)42.7 g
• B)37.5 g
• C)150. g
• D)107 g
• E)173 g

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