What is a reasonable hypothesis to account for the closing proportionality between density and atomic mass mass?
A. 1 g of any of these gases contains the same atoms as 1 g of any other.
B. The larger mass of the atom, the larger their size
C. The larger the mass of the atom the smaller their size
D. 1 L of any of these gas is contains the same number of atoms as 1 L of any other.