ceasar3

2. (a) Given the following equations and H0rxn at 250C H3BO3(aq) ¨ HBO2(aq) + H2O(l) ∆H0rxn = -0.02kJ H2B4 O7(s) + H2O(l) ¨ 4HBO2(aq) ∆H0rxn = -11.3kJ H2B4O7(s) ¨ 2B2O3(s) + H2O(l) ∆H0rxn = +17.5kJ (i) Calculate ∆H0rxn for the reaction 2H3BO3(aq) ¨ 2B...

A foam plastic of density of 0.58g/cm^3 is to be used as a life jacket.What volume of the plastic must be used if it is to keep 20percent by volume of an 80kg physics student above water in a lake if the average density of the student is 1.04g/cm^3

evaluate lim x^3 -8 divided by x^2 -4 as x approaches 2