A buffer solution of volume 100.0 mL is 0.140 m Na2HPO4(aq) and 0.120 m KH2PO4(aq). (iii) What are the pH and the pH change resulting from the addition of 75.0 mL of 0.0100 m NaOH(aq) to the buffer solution

The density of a planet is 0.69 g/cm3 (density of water is 1.0 g/cm3). which of the following planets might this be? a. mercury b. venus c. saturn d. mars

What is the density of the black hole

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space