On this practice test, only the multiple choice and True-False questions are automatically graded. For other questions, write down your answers so you can compare the correct answers with yours. You don't need to type in the equations - it's probably easier to write them. You can also just write down coefficients rather than the whole equation.
For example, for the balanced equation:
Zn + 2 HCl --> H2 + ZnCl2
you could just write the coefficients: 1, 2, 1, 1