How many moles of water were lost if the amount of water lost was 0.406 grams? do not include units and assume three significant figures in all numbers. be sure to include the zero before the decimal if the number is less than one.

0.0226

Explanation:

Given data:

Mass of water = 0.406 g

Molar mass of water = 18.0 g/mol

Number of moles = ?

Solution:

Number of moles = mass/ molar mass

Number of moles = 0.406 g / 18.0 g/mol

Number of moles = 0.0226 mol

The answer with out units and three significant figures is 0.0226. In this value the significant figures are 226.

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.