# chemistry

According to the following thermochemical equation, what mass of H2O (in g) must form in order to produce 975 kJ of energy?

SiO2(s) + 4 HF(g) → SiF4(g) + 2 H2O(l), ΔH°rxn = -184 kJ

1. 👍 0
2. 👎 0
3. 👁 3,460
1. 184 kJ energy released in the formation of 2 moles(36 g) H2O. So
36.0 g H2O x (975 kJ/184 kJ) = ??

1. 👍 4
2. 👎 1
2. 45

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2. 👎 4
3. what mass of Mg combines with 5.80 L of O2 measured at STP

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2. 👎 0
4. 190.8

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2. 👎 0

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