the conjugate acid of HPO4 2- ..which is the correct option .a)PO4 3- ...b)H2PO4 2- c)H2PO4- d)H3PO4​

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false