Answer:
A) 0.660 g/ml
B) 1.297 ml
C) 0.272 g
Explanation:
Every substance, body or material has mass and volume, however the mass of different substances occupy different volumes. This is where density [tex]D[/tex] appears as a physical characteristic property of matter that establishes a relationship between the mass [tex]m[/tex] of a body or substance and the volume [tex]V[/tex] it occupies:
[tex]D=\frac{m}{V}[/tex] (1)
Knowing this, let's begin with the answers:
Answer A:
Here the mass is [tex]m=0.155g[/tex] and th volume [tex]V=0.000235L=0.235mL[/tex]
Solving (1) with these values:
[tex]D=\frac{0.155g}{0.235mL}[/tex] (2)
[tex]D=0.660g/mL[/tex] (3)
Answer B:
In this case the mass of a sample is [tex]m=4.71g[/tex] and its density is [tex]D=3.63g/mL[/tex].
Isolating [tex]V[/tex] from (1):
[tex]V=\frac{m}{D}[/tex] (4)
[tex]V=\frac{4.71g}{3.63g/mL}[/tex] (5)
[tex]V=1.297mL[/tex] (5)
Answer C:
In this case the volume of a sample is [tex]V=0.293mL[/tex] and its density is [tex]D=0.930g/mL[/tex].
Isolating [tex]m[/tex] from (1):
[tex]m=D.V[/tex] (6)
[tex]m=(0.930g/mL)(0.293mL)[/tex] (7)
[tex]m=0.272g[/tex] (8)
