A gas collected when the temperature is 7°C and the pressure is 140 kPa measures has a volume of 4
L. Calculate its volume at 60 kPa and 27°C.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

i belive it is water

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.