A sample of an unknown metal has a density of 7.2 g/mL and a volume of 6.55 cm . What is its mass?

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 6.55 cm³ = 6.55 mL

density = 7.2 g/mL

We have

mass = 7.2 × 6.55

We have the final answer as

Hope this helps you

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.