If an object has a density of 0.781 g/cm3, what is its density in units of kg/m3?

What is the equilibrium constant of aa+bb=cc+dd

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0