Forces and Motion:Question 8 Two students are pushing a sofa across a room.
125 N
-275 N
What is the net force applied to the sofa by the students?

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?