Water has a density of 1.0 g/ml and the ocean water has a density of 1.025 g/ml. why are they different?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance