The density of aluminium is 2.70g/cm^3 . if a cube of aluminum weights 13.5 grams, what is the lengths of the edge of the cube.

-

1.71 cm

Explanation: -

Density of aluminium = 2.70 g /

Mass of aluminium = 13.5 g

We know density of a substance is the mass of the substance per unit volume.

Density = Mass / volume

Volume = Mass / density

Volume of aluminium = Mass of aluminium / Density of Aluminium

= 13.5 g / 2.70 g/

= 5

We know for a cube volume =

Length of the cube =

=

=1.71 cm

Thus if the density of aluminium is 2.70g/ and the cube of aluminum weights 13.5 grams, 1.71 cm is the length of the edge of the cube

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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