Question

Please help! Worth 20 points
For each reaction below, write the balanced equation.

1.FeS2+O2—>Fe2O3+SO2

2.AI+O2—>AIO2

3.K+Br2- ->KBr

4.SiO2+HF—>SiF4+H2O

Answer 1

1. 2FeS2+7O2-->2FeO3+4SO2
2. Al+O2-->AlO2
3. 2K+Br2-->2KBr
4. SiO2+4HF-->SiF4+2H2O