What is the net ionic equation for the reaction between Na2SO4 and CaCl2? A. 2Na+(aq) + 2Cl-(aq) 2NaCl(aq)
B. Na2SO4(aq) + CaCl2(aq) CaSO4(s) + 2NaCl(aq)
C. SO42-(aq) + Ca2+(aq) CaSO4(s)
D. 2Na+(aq) + SO42-(aq) + Ca2+(aq) + 2Cl-(aq) CaSO4(s) + 2Na+ + 2Cl-(aq)

Water ionizes by the equation h2o(l)⇌h+(aq)+oh−(aq) the extent of the reaction is small in pure water and dilute aqueous solutions. this reaction creates the following relationship between [h+] and [oh−]: kw=[h+][oh−] keep in mind that, like all equilibrium constants, the value of kw changes with temperature.

The answer for #3 is c but i don't know why

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned