Aglass of water contains 1.2 x 1024 molecules of water. an additional 5.0 moles of water are poured into the glass. how many molecules of water are in the glass?

Explanation:

In one mol of molecules contains the Avogadro's number of molecules, which is 6,022x10²³ So when we poured 5 moles of water, we poured five times the Avogadro's number of molecules of water

5 x 6,022x10²³ = 3.011x10²⁴

Now we need to add that to the 1.2x10²⁴ molecules the glass of water contains

3.011x10²⁴+ 1.2x10²⁴=4.211x10²⁴

So in the end there are 4.211x10²⁴ molecules of water in the glass

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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