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.

Hbr dissociates to form h+ and br-ca(oh)2 dissociates to form ca2+ and 2oh-the h+ and oh- react to form waterassuming the reactants are dissolved in water, the net reaction is h+ + oh- —> h2oif you’re asked to show all components of the reaction, the complete reaction is 2hbr + ca(oh)2 —> cabr2 + 2h2o

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.