How many moles of each substance are needed to prepare the following solutions?

45.0 ml of 7.5 %m/v kcl (mw = 74.55 g/mol)

400.0 ml of 9.5 %m/v acetic acid (mw = 60.05 g/mol)

Pauling and lewis questioned the extreme definitions of bonds. they wondered if bonds might be described somewhere in between the two extremes (covalent and ionic). on the basis of experimental data,pauling confirmed that bonds could be ionic, covalent, and for those, in between, exhibit a degree of ionic character. he theorized that the major factor was how strongly the atoms in the bond attracted the electrons. pauling called this factor - the tendency of an atom to attract electrons in a bond.

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

Air can be considered a mixture. which statement does not explain why?