6. Iron has a density of 7.874 g/cm3. What is the mass of a rectangular block of iron with dimensions of 3.000 cm by 4.000 cm by 5.000 cm?

To find the mass of the rectangular block of iron, we need to multiply its volume by its density.

The volume of the block can be found by multiplying its length, width, and height.

Volume = length * width * height

Given that the dimensions are:
Length = 3.000 cm
Width = 4.000 cm
Height = 5.000 cm

Volume = 3.000 cm * 4.000 cm * 5.000 cm = 60.000 cm³

Now, we can calculate the mass by multiplying the volume by the density.

Mass = Volume * Density

Density of iron = 7.874 g/cm³

Mass = 60.000 cm³ * 7.874 g/cm³

Mass ≈ 472.44 g

Therefore, the mass of the rectangular block of iron is approximately 472.44 grams.