<span>The mass number given on
the periodic table is a weighted average of all the isotopes. You get the exact mass of
an isotope by adding the protons(atomic number) to the
number of neutrons in that isotope.</span>
Answer:
2. Translucent
4. Reflection
Explanation:
The terms translucent describes the nature of the juice and reflection perfectly fits the property of the light.
A translucent substance is one that partially allows light to pass through it. Since it is said that some of the light bounced back and some passed through, this is translucent.
Also, the light bouncing back is an indicator of reflection. Reflection is a property of light where it bounces back a surface.
Answer:
I) Solvent-solvent interactions involves B & F.
B. Interactions involving dipole-dipole attractions.
F. Interactions between the water molecules.
II) Solute-solute interactions involves A & D.
A. Interactions between the ions of sodium chloride.
D. Interactions involving ion-ion attractions.
III. Solute-solvent interactions involves G & C
G. Interactions formed between the sodium ions and the oxygen atoms of water molecules.
C. Interactions formed during hydration.
Ksp is the equilibrium constant of solubility of a solid in a solution.
The solid is CaC2O4.
The dissolved ions are Ca2+ and C2O4 2-
The equation of the equilibrium is

Then Ksp = [Ca 2+][C2O4 2-]
Where the [ ] indicates molar concentration
The chemical equation for this equilibrium implies [Ca 2+] = [C2O4 2-]. Name X this quantity
Ksp = x^2 ==> x = square root of Ksp
x = sqrt(2.3 * 10^ -9) = 4.8 * 10^ -5
Which is the second option.
Question 4 is C. 13 I believe