To make a 4.00 M solution, how many moles of solute will be needed if 12.0 liters of solution are required?

To make a 4.00 M solution, 48 moles of solute will be needed if 12.0 liters of solution are required.

Explanation:

Molar concentration or molarity is a measure of the concentration of a solute in a solution, be it some molecular, ionic or atomic species.

Molarity is defined as the number of moles of solute that are dissolved in a given volume. Then it is calculated as the quotient between the number of moles of solute and the volume of solution:

Molarity is expressed in units .

In this case:

Replacing:

Solving:

4 M*12 liters= number of moles of solute

48 moles= number of moles of solute

To make a 4.00 M solution, 48 moles of solute will be needed if 12.0 liters of solution are required.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

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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