You would use the formula for Boyle's Law:
(P1) (V1) = (P2) (V2)
(101.5) (2.0) = (P2?) (.75)
*P2 = 270kPa (You're allowed 2 significant figures)
P = Pressure
V = Volume
The two ways to make a saturated solution are 1 reducing the temperature of the solution and Adding more solute.<span> </span>
Mass is measured against a standard by using a balance. The statement given above is a fact. Therefore the answer among the choices is letter "A" or "A. True". I hope this helps you on your assignment.
<span>Made up of particles packed relatively close together, having an indefinite shape but a definite volume</span>