Question

The Mg ribben used is 20 mm long 0.40 men thick and 4.0mm wide if the density of magnecm metal is 1.74g/cm ^ 3) what is the mass of the piece of Mg ribbon?

Answer 1

Answer:

The mass of the piece of Mg ribbon is 0.056g.

Explanation:

1st) It is necessary to calculate the volume of the Mg ribbon:

$\begin{gathered} Volume=length*width*height \\ Volume=20mm*4.0mm*0.40mm \\ Volume=32mm^3 \end{gathered}$

The volume is 32mm^.

2nd) With the volume and the density, we can calculate the mass of the Mg ribbon. It is important to convert first the mm^ to cm^: ()32mm^3=0.032cm^3

$\begin{gathered} density=\frac{mass}{volume} \\ 1.74\frac{g}{cm^3}=\frac{mass}{0.032cm^3} \\ 1.74\frac{g}{cm^3}*0.032cm^3=mass \\ 0.056g=mass \end{gathered}$

So, the mass of the piece of Mg ribbon is 0.056g.