Question

you calculate the density of a aluminum to be 2.68 g/cm 2.65 g/cm 2.62 g/cm look up the density of aluminum at room temperature and find it to be 2.70 g/cm what is the percent error

Answer 1

Answer:

The density of a substance tells you the mass of exactly one unit of volume of said substance.

In your case, aluminium is said to have a density of

density Al

=

2.70 g

.

cm

−

3

This tells you that every

1 mL

of aluminium has a mass of

2.70 g

.

All you have to do now is use the density of aluminium as a conversion factor to go from cubic centimenters of aluminium to grams

10.0

cm

3

⋅

2.70 g

1

cm

3

=

27.0 g

−−−−−

The answer is rounded to three sig figs.

Explanation: