Which equation correctly relates the heat of reaction to the standard heats of formation?
1 answer:
Answer:
D
Explanation:
∆H° = ∆Hf ° (products) – ∆Hf ° (reactants)
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D. The number of electrons equals the atomic number for a neutral element. Each number after the letter refers to the number of electrons in that shell. So for D, 2+2+6+2+6+2 = 20 electrons, which is equal to the atomic number.
Answer:
NO + O2 -> NO2
it is balanced
You would have to dig up 261 g of sylvanite.
Mass of sylvanite = 73.0 g Au × (100 g sylvanite/28.0 g Au) = <em>261 g </em> sylvanite.
Explanation:
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Wood sinks in ethanol => wood has higher density than ethanol.
