El sonido es una onda que se crea por vibración y se propaga a través de un medio de un punto a otro. De modo que es basicamente una onda mecánica longitudinal.
Es una onda mecánica pues necesita un medio para propagarse,
The chemical reaction comprises chemical changes, that is, changes in the composition of the molecules, the formation of new compounds. As a consequence of the chemical reaction, new substances are produced, which cannot be reversed by any physical means.
One of the best ways to identify a chemical reaction is observing the change in color, or changes in the color of the substance. This is one of the most general observable chemical reaction known, the basic example is the changing of litmus paper color when it comes in contact with the acid.
Answer: Option (c) is the correct answer.
Explanation:
HF is a weak acid and not a strong acid. This is because fluorine is a highly electronegative atom and when it combines with a hydrogen atom then it will attract the valence electron of hydrogen atom more towards itself.
As a result, it will not dissociates easily to give hydrogen ion. Hence, it acts as a weak acid.
A neutralization reaction is defined as a reaction in which an acid reacts with a base to give salt and water. For example,
It is true that, spectator ions "appear in the total ionic equation for a reaction, but not in the net ionic equation".
Titration is defined as a process in which concentration of an unknown solution is determined using a solution of known concentration.
Thus, we can conclude that the statement HF, HCl, and HNO3 are all examples of strong acids, is false.
The constant variable is the math problems, the dependent variable is the calculators, and the independent variables are the students
Number of moles = 2.12 mol C3H8.
1 mol C3H8 = 6.02 × 1023 molecules C3H8.
<span>1 molecule C3H8 = </span>11 atoms.
(3 carbon atoms<span> and 8 hydrogen atoms)</span>