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The enthalpy of the reaction forming PbO...

The enthalpy of the reaction forming PbO according to the following equation is 438 kJ. What heat energy (kJ) is releated in formation of 22.3 g PbO(s)?
(Atomic masses : Pb = 207, O = 16.0)
`2Pb(s) +O_(2)(g)rarr2PbO(s)`

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