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

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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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