kaeladicristofano kaeladicristofano

21-07-2017
Chemistry

contestada

what is the molecular formula of the compound whose molar mass is 120.0 g/
mol and empirical formula is SiO2

Respuesta :

dec77cat dec77cat

21-07-2017

M=120.0 g/mol

M(SiO₂)=A(Si) + 2A(O)
M(SiO₂)=28+2*16=60 g/mol

N=M/M(SiO₂)
N=120.0/60=2

(SiO₂)₂ or Si₂O₄

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