What is the percent yield of the decomposition reaction if 12.3 g of Pb(NO3)2
are heated to give 5.5g PbO?
2Pb(NO3)2 --> 2PbO +4NO2 +O2

a 72%
b 54%
c 74%
d 60%
e 41%
f 66%
g 63%
h 69%

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

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Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy