One mole (mol) of ethanol (C2H60) has a mass of 46.0684 g. How many moles of ethanol are in an 18.0 g sample?

Need to see how the calculation was done.

the number of moles of ethanol is 18 g sample is 0.390 mol

Explanation:

The computation of the  number of moles of ethanol is 18 g sample is shown below:

= Mass of ethanol sample ÷ molar mass of ethanol

= 18 g ÷ 46.064=84 g

= 0.390 mol

Hence, the number of moles of ethanol is 18 g sample is 0.390 mol

try answer.com that works for me

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.