Asample of a compound of xenon and fluorine contains molecules of a single type; xefn, where n is a whole number. if 5.0 x 1020 of these xefn molecules have a mass of 0.172 g, what is the value of n?

4

Explanation:

Avogadro’s number represent the number of the constituent particles which are present in one mole of the substance. It is named after scientist Amedeo Avogadro and is denoted by .

Also, it is the number of particles in exactly 12.000 g of isotope carbon 12.

Avogadro constant:-

Hence,

Mass of = 131.293+ n18.998 g

So,

 molecules have a mass of 131.293+ n18.998 g

Also,

 molecules have a mass of g

So,

 molecules have a mass of g

Also, given mass = 0.172 g

Thus,

Thus, value of n is 4.

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.

the ratio of the conjugate base to the acid required to attain the desired ph.