0.56 gm/ml is the density of a piece of tempered glass.
Step-by-step explanation:
In the question the formula for density have be given , that is, density= mass/ volume. The value of mass as well as the volume has been provided in the question, they are the value of mass is 2.8 gm and the value of the volume is 5 ml. Putting the value of mass and the volume we get 2.8/5= 0.56 gm/ml . Hence, the density of a piece of tempered glass is 0.56 gm/ml.