- Is sprouted bread acidic?

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Verify the identity: cos^2 theta - sin^2 theta = 2cos^2 theta -1? V=-y/x^2+y^2,then find dv/dx? Physics An infinite cylinder with radius A has a radially dependent charge density of p(R) BR? How do I calculate the emf of the following concentration cell?
Mg(s) | Mg2+(0.22 M) || Mg2+(0.67 M) | Mg(s)? Will N2 or Co2 molecules have the higher average velocity at the same temperature? Explain?