Shiny
Somewhat reactive
Standard temp. and pressure
Answer:
I. Solvent-solvent interactions ⇒ B, F
II. Solute-solute interactions ⇒ A, D
III. Solute-solvent interactions ⇒ C, E, G
Explanation:
In the dissolution of sodium chloride (NaCl) in water, the solute is NaCl which in solution is dissociated into its ions (Na⁺ and Cl⁻) and the solvent is water (H₂O) whose molecules are polar and therefore are considered as dipoles.
Solvent-solvent interactions are between water molecules so they are between dipoles (options B and F)
Solute-solute interactions are between NaCl ions in which electrostatic forces are involved. They can be between sodium ions or choride iones (Na⁺-Na⁺, Cl⁻-Cl⁻, repulsive) or between sodium and chloride ions (Na⁺-Cl⁻, attractive) (options A and D).
Solute-solvent interactions are between sodium chloride ions and water molecules, so dipole-ion forces are involved. During dissolution process, solute ions are surrounded by water molecules, which is called hydration. The overall process is exothermic (releases heat) (options C, E and G).
I would but your picture is too dark!!!
Answer:
<h3>0.2498mol

</h3>
Explanation:
7gN2 x 
=0.2498mol N2
Nitrogen gas has the formula
so therefore that means you would have to multiply the mass in the molar by 2. To solve for the number of moles you need to cancel out the grams, you do this by using the molar mass of nitrgoen gas. You get the value on in the denominator from the periodic table (atomic mass of element). The grams will cancel out, leaving you with the number of moles when you divide 7/2(14.01).