Why must the number of electrons lost equal the number of electrons gained in every redox reaction?

Using complete sentences, explain how to predict the products and balance the reaction between sulfuric acid and potassium hydroxide.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Select the correct answer. why are scientific models important in the study of science? a. they always involve critical mathematical calculations. b. they scientists understand complex ideas and objects that aren’t easy to handle. c. they enable scientists to popularize their work in society. d. they are required when conducting any peer review process. e. they are necessary for turning a hypothesis into a law.