A gas occupying 25.0 L has a pressure of 25.0 lb/in.^2. What volume will it occupyif the pressure changes to 35.0 lb/in.^2. while the temperature remains constant?

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?

What is the value of the standard enthalpy of formation of an element in its most stable form?

Did the detergents containing enzymes work better at removing stains than those containing no enzyme? why or why not?