Calculate the amounts of na hpo and nah. po (in grams) needed to prepare 200 ml. of a buffet with ph - 8.25 so that the sum of concentrations of hpo and h, po, ions is 0.5 m. pk. - 2.12. pk = 7.21, pk,= 12.38

Alarge marble is dropped in a graduated cylinder with 35ml of water in it.the water level increases to 49ml.what is the volume of the marble

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.