2 0 g sample contain mixture of SiO2 and Fe2 O3 on very

Last updated: 7/2/2023

2 0 g sample contain mixture of SiO2 and Fe2 O3 on very strong heating leave a residue weighing 1 96 g The reaction responsible for loss of weight is Fe2 O3 s Fe3 04 s O2 g unbalance equation What is the percentage by mass of SiO2 in original sample 1 10 2 20 3 40 4 60