Calculate the ph of a solution prepared by dissolving 2.129 g of solid anhydrous na2hpo4 (fw, 141.98) in about 50 ml of water, adding 1.000 ml of 6.00 m hno3, and diluting the mixture with water to 100.0 ml. the stepwise acid dissociation constants for phosphoric acid are 7.11 × 10-3, 6.32 × 10-8, and 7.1 × 10-13. assume the activity coefficients are equal to 1.00.

During metamorphic processes, increased pressure and temperature can affect the of minerals in rock. rocks subjected to very high pressure are typically than others because mineral grains are squeezed together, and the atoms are more closely packed. during metamorphic processes, water facilitates the transfer of ions between and within minerals, which can the rate at which metamorphic reactions take place. the growth of new minerals within a rock during metamorphism has been estimated to be about per million years. metamorphism is commonly associated with convergent plate boundaries, where two plates move toward each other. during contact metamorphism, a large intrusion will contain thermal energy and will cool much more slowly than a small one. metamorphosed sandstone is known as the metamorphic rock made from metamorphosed shale, was once used to make blackboards for classrooms.

In any energy conversion, some of the energy is lost to the environment as question 5 options: electrical energy potential energy sound energy thermal energy

Different isotopes indicate that an element will have different numbers of