Perform the following operation. Express your answer in scientific
notation.

1.55 x 103 x 1.20 x 103

A.2.75 x 103

B.1.86 x 106

C.2.75 X 106

This drawing shows a human body system. what is the primary function of this body system?

High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?

How much mass would a mole of hydrogen molecules contain? recall that hydrogen is diatomic. g/mol