Respuesta :

elenacorsan93

Answer:

53.2%

Explanation:

  • Write the mass of the elements in your molecule:

Mass of Si in 1 mol SiO2 =28.1g

Mass of O  in 1 mol SiO2 =16x2g= 32g

  • Now find the mass of your compound

Mass of compound= 28.1+32=60.1

  • Divide each element's mass by the mass of the compound to find the percent by mass following this formula:

% by mass = (mass of element/mass of compound) x 100

% by mass of oxigen= (32g/60.1) x 100

% by mass of oxigen= 53.2%

I hope you find this information useful and interesting! Good luck!

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