Some states authorize a to make healthcare decisions for patients who can't make them because they're incapacitated. O a) healthcare proxy b) living will O c) durable power of attorney O d) do-not-resuscitate order

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

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?