Some of the symptoms from swallowing hydrochloric acid:
When a hydrocarbon burns in the presence of oxygen, it forms carbon dioxide and water and this a an example of combustion reaction.
Reactants of a chemical reaction is defined as the substances which take part in a chemical reaction and undergoes a chemical change. Reactants are written on left side of the arrow.
Products are defined as the substance which are formed at the end of the chemical reaction.Products are written on the right side of the arrow.
Thus the products are carbon dioxide and water.
A 0.085 M solution of HC₈H₇O₂ is found to have a pH of 2.68. The Ka value for this acid is 0.00005262.
Phenylacetic acid is an inorganic compound that contains two functional groups, one is carboxylic acid and phenol group.
pH is the value of measurement of acidity and the basicity of any liquid. It is potential hydrogen. It is the measurement of the acidity and basicity of any solution.
The acid dissociation constant is the equilibrium constant of an acid's dissociation reaction. It is denoted by ka.
Given, that 0.085 M solution of HC₈H₇O₂. The pH is 2.68.
Ka = [H+][PAc-] / [PAcH]
[H+] = 10⁻²·⁶⁸ = 0.00209M = [PAc-]
[PAcH] = 0.085 = 0.00209 = 0.083
Ka = (.00209)(.00209) / (0.083) = 0.00005262
Thus, the Ka value for this acid is 0.00005262.
To learn more about phenylacetic acid, refer to the link:
Avogadro's Number or Avogadro's Constant to the number of particles that constitute a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023 * 10²³ particles per mole. Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without dimension or explicit unit of expression. The Avogadro number applies to any substance.
Then a rule of three applies as follows: if 1 mole has 6,023 * 10²³ atoms, 2 moles how many atoms will it contain?
number of atoms=1.2046*10²⁴ atoms
This number is already represented in scientific notation.
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Thermal equilibrium is the state in which two bodies come into mechanical contact, equalize their temperatures, due to the irradiation of one towards the other until reaching an energy balance. The thermal equilibrium point is reached when the kinetic energy that is shared between two bodies is distributed throughout the system, in other words, both bodies start to function as a single thermodynamic system, with the same internal energy and temperature
Answer: Option (b) is the correct answer.
It is known that in solids, particles are placed closer to each other due to strong forces of attraction between them. Due to this solids occupy a fixed shape an volume.
On the other hand, molecules of a liquid are held by less strong forces as compared to solids. Therefore, molecules of a liquid are able to slide past each other.
Hence, when in liquid phase particles bond together it it changes into solid phase.
Thus, we can conclude that the phase change that occurs when the attraction between liquid particles becomes a significant factor and the particles bond together is freezing.