A solution is always transparent, light passes through with no scattering from solute particles which are molecules in size. The solution is homogeneous and does not settle out. A solution cannot be filtered but can be separated using the process of distillation.
A suspension is cloudy and heterogeneous. The particles are larger than 10,000 Angstroms which allows them to be filtered. If a suspension is allowed to stand the particles will separate out.
A colloid is intermediate between a solution and a suspension. While a suspension will separate out a colloid
will not. Colloids can be distinguished from solutions using the Tyndall effect. Light passing through a colloidal dispersion, such as smoky or foggy air, will be reflected by the larger particles and the light beam will be visible.
A pure substance is a solid, liquid or gas which molecules which are all identical, or an infinite crystaline polymer in which all unit cells are the same.
A;4, b;6, c;7, d;5, e;8, f;3
C. MgCl2
This structure forms a ionic bond, which are generally stronger than covalent bonds. All of the other choices are covalent.
Answer:
221.37 u
Explanation:
The formula for the calculation of the average atomic mass is:
Given that:
For first isotope:
% = 65.51 %
Mass = 223.95 u
For second isotope:
Since the element has only 2 isotopes, so the percentage of second is 100 - first percentage.
% = 100 % - 65.51 % = 34.49 %
Let, Mass = x u
Given, Average Mass = 223.06 u
Thus,
Solving for x, we get that:
x = 221.37 u
<u>Thus mass of second isotope = 221.37 u</u>
Answer:
When a substance gains or loses energy, its <u>temperature</u> or <u>state</u> changes. These two changes do <u>not</u> happen with respect to time; the temperature remains <u>the same</u> until the change of <u>state</u> is complete.
Explanation:
This statement is about energy and change of the state of the matter. By gaining or losing energy, the physical state of the matter can change into one another. Melting, freezing, condensation, evaporation, sublimation, and deposition are the processes that support to change the physical state of the matter. Change in state and change in the matter do not happen at the same time. A substance gains or loses energy to reach a specific temperature and remains constant until the physical change of matter is completed.