There are 5.7 moles of helium in a container. How many atoms of He does the container hold?

3.43 x 10²⁴atoms

Explanation:

To solve this problem, the mole concept will play a very vital role.

 We have been given that:

        number of moles  = 5.7moles of He;

 So;

  We know that:

      1 mole of any substance contains 6.02 x 10²³ atoms

  5.7 moles of He will contain 5.7 x 6.02 x 10²³ atoms   = 3.43 x 10²⁴atoms

h

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.

if it's not useful, feel free to report for mistake in answer.