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Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3

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

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