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RhondaSommer (rhondasommer):
A compound contains 67.1 percent zinc and the rest is oxygen. What is the empirical formula of the compound? ZnO Zn2O ZnO2 Zn2O4
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RhondaSommer (rhondasommer):
ZnO right?
OpenStudy (sweetburger):
No Zn is only 65% mass of that compound. Zn2O4 has Zn to be 67.1% by mass
RhondaSommer (rhondasommer):
how does the "2" change the mass?
OpenStudy (sweetburger):
65+65+16+16+16+16= 194. so the mass of Zn/ mass of Zn2O4 = 130/194 =67%
RhondaSommer (rhondasommer):
woah wait a sec. were did all those numbers come from?
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OpenStudy (sweetburger):
1 Zn + 1 Zn + 1 Oxygen + 1Oxygen + 1 Oxygen + 1 Oxygen
RhondaSommer (rhondasommer):
Oh!
RhondaSommer (rhondasommer):
I C I C
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