Which word describes a hypothetical gas that perfectly fits all the assumptions of the kinetic-molecular theory?"
O ideal
O imaginary
O perfect
real

A hypothetical gas that perfectly fits all the

assumptions of the kinetic- molecular theory is Ideal gas.

(they actually don't exist)

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

catya your not at all which answer i've seen you do this on another question!