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At 70°C, the pH of water is 6.41. What is the ion-product constant of water, Kw, at 70°C? What are osteocytes? What do they do in vertebrates? The real value of rfor which systemof equation 2rx-2y+3z=0.x+ry+2z=0,2x+rz=0 hasnon trivial solution is? What volume of water must be added to 11.5 mL of a pH 2.0 solution of nitric acid in order to change the pH to 4.0? Solve the following second order differential equations using undetermined coefficients

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