What is the mass of a sample of nh3 containing 3,80 x 10^24 molecules of nh3?
748 grams
894 grams
101 grams
107 grams

107 grams

Explanation:

1 mole of any substance contains 6.022*10²³ molecules/ions/atoms.

1 mole of contains 6.022*10²³ molecules of .

Since molar mass of   is 17 grams,

17 g of NH3 contains 6.022*10²³ molecules of .

We have to find the mass of NH3 when it contains molecules.

By unitary method, it is .

Hence 107 grams of contains molecules of .

it's filtration, but this is an assumption so my apologies if i got this

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.