A chemist encounters an unknown metal. They drop the metal into a graduated cylinder containing water, and find the volume
change is 5.3 mL. If the metal weighs 2.3 g, what is the density of
the metal?

Explanation:

The density of a substance can be found by using the formula

From the question

mass of metal = 2.3 g

volume = 5.3 mL

So we have

We have the final answer as

Hope this helps you

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"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."