A piece of iron with a mass of 119 g is placed in a graduated cylinder,where the water level is to 57 mL.The water level rises to 72 mL.What is the density of the iron?

Question

Quizplus · Accepted Answer

Density = mass/volume

First, we need to figure out the volume of the iron. We can do this by finding the difference in the water levels before and after the iron was placed in the graduated cylinder:

Volume of iron = final volume - initial volume 
Volume of iron = 72 mL - 57 mL 
Volume of iron = 15 mL

Now we know that the volume of the iron is 15 mL. Next, we need to find the mass of the iron, which is given in the problem as 119 g.

Using the formula above, we can calculate the density of the iron:

Density = mass/volume 
Density = 119 g/15 mL 
Density = 7.9 g/mL

Therefore, the density of the iron is 7.9 g/mL, which is choice letter D.

A Piece of Iron with a Mass of 119 G