Need help step through step on how to do this…was late to the class and don’t understand this at all have a test tomorrow please help

What is the type of the reaction below? bacl2 + h2so4 → 2 hci + baso4 double replacement synthesis single replacement decomposition

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Formulating a hypothesis: part i since the investigative question has two variables, you need to focus on each one separately. thinking only about the first part of the question, mass, what might be a hypothesis that would illustrate the relationship between mass and kinetic energy? use the format of " because when writing your hypothesis