How many moles of Hydrogen do you need, if you have 7.8 mol of Nitrogen? N2 + 6H2 → 2NHO
A.1.3 mol H2
B.2.63 mol H2
C.23.17 mol H2
D.46.8 mol H2

D

Explanation:

the ratio of H2 to N2 is 6:1

therefore it means that for 1 mol we have 7,8 so you multiply by 6

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.

they are all solids.