Answer:
The answer is SiO2
Explanation:
Silocon dioxide is written without a 1 after the silocon and with a 2 after the oxygen.
work was done by the system
SI-28
189.75g
mass is equal to mole*molar mass and the molar Mass of KNO3 is 55 so 3.45*55 is equal to 189.75