Can somebody please answer this question

Question

The density of aluminium is 2.7 g/cm3. Find the mass in grams of a bar of aluminum measuring 4.0 cm by 2.2

cm by 14.0 cm. g

Answer 1

Density = mass / volume

We know the density and we can calculate the volume from the dimensions of the bar.

volume of the bar = L x W x H = 4 cm x 2.2 cm x 14.0 cm = 123.2 cm³

Now we can solve for mass (grams)

Density = mass / volume

2.7 g / cm³ = mass / 123.2 cm³

mass = 2.7 g / cm³ x 123.2 cm³ = 332.64 g = 330 g (2 sig. figs.)

Answer 2

4(2.2)(14)(2.7)

=332.64 grams for the aluminum bar

Volume = 4(2.2)(14) = 123.2 cm^3

2.7 gram per 1 cm^3 = Density

Mass = Volume times Density

123.2(2.7/1) = 332.64 grams total