B. 0.72 mol NaCl
http://www.convertunits.com/from/grams+NaCl/to/moles
Explanation:
The main functions of the cell wall are to provide structure, support, and protection for the cell. The cell wall in plants is composed mainly of cellulose and contains three layers in many plants. The three layers are the middle lamella, primary cell wall, and secondary cell wall
Answer:
Hydrogen = element
Carbon dioxide = compound
Water = compound
Zinc = element
Nitrogen = element
Salt = compound
Helium = element
Carbon monoxide = compound
Explanation:
An element and a compound are different when it comes to the types of atoms they possess. An element has only<u><em> one type of atom</em></u> while a compound has <u><em>two types of atoms.</em></u> For example, Hydrogen is an element because it has two atoms of the same type and that is, the "Hydrogen atom."
On the contrary, Carbon dioxide has<u><em> one carbon atom</em></u> and<u><em> two atoms for Oxygen.</em></u> Therefore, it is a compound because it has two types of atoms: <u><em>Carbon atom</em></u> and <em><u>Oxygen atom.</u></em>
Water has<u><em> two atoms of Hydrogen </em></u>and<u><em> one atom of Oxygen</em></u>. Therefore, it is a compound because it has two types of atoms: <u><em>Hydrogen atom</em></u> and <u><em>Oxygen atom</em></u>.
A piston-cylinder device contains helium gas, during a reversible, isothermal process the entropy of the helium will <u>sometimes </u>increase.
As entropy of an ideal gas depends on pressure and temperature . Hence , entropy change during isothermal process if pressure changes . Enropy changes whenever there is a transfer of heat . The change in entropy is the heat added divided by the temperature at which the transfer took place .
A piston-cylinder is a moving device that is made tight by the piston rings. It moves inside in a cylinder in the form of liquid and later expands and then contracts.
To learn more about reversible isothermal process
brainly.com/question/15429172
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