PLEASE HELP At constant pressure change in (PV)=P(Change in V). If this is substituted into the equation `14.2 it becomes Change in H= Change in E + P( Change in V). Water expands about 8.7% when it feezes. Assume the volume of 1g of water is 1cm^3. Calculate the change in V for the freezing of 1 g of ice.

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g