The concept we are looking for here is electronegativity. This concept is a measure of how strong an atom or element can attract a pair, that is bonding, of electrons to itself.
Fluorine is the element or atom of the greatest electronegativity. Electronegativity would increase as we move left to right of the periodic table.
Answer: Hydrocarbon fuels like methane (CH4) burn in the presence of oxygen to produce carbon dioxide and water. This process of combustion releases energy. When energy is released during the course of a chemical reaction, it is said to be an EXOTHERMIC reaction.
Explanation:
The Ka is 0.0104.
To solve for the Ka, the formula is Ka = [H+][ClO-]/[HClO].
In order to determine the value of H+, the formula is H+ = 10^-pH (the pH here
is 1.80). This yields 0.015848931924611134. In the ICE table, since H+ is the same
value as ClO, then the ClO is also 0.015848931924611134. The HClO is the 0.04 -
0.015848931924611134. Substituting the values to the earlier mentioned
equation, the answer is 0.01040072606175673227903507631149 or simply, 0.0104.
Answer:
- <u><em>C. The rate of sublimation of the NH₄CI crystals is equal to the rate of solidification of the NH₄CI vapors.</em></u>
<u><em></em></u>
Explanation:
The question is garbled and the reactants and products do not match.
This is the correct question, assuming the products are correctly described:
"Consider the equilibrium system below.
If the system is at dynamic equilibrium, which statement is true?
- A. Sublimation of the NH₄CI crystals stops.
- B. Solidification of the NH₄CI vapors stops.
- C. The rate of sublimation of the NH₄CI crystals is equal to the rate of solidification of the NH₄CI vapors.
- D. The rate of sublimation of the NH₄CI crystals is higher than the rate of solidification of the NH₄CI vapors"
<h2>Solution</h2>
The left side of the equation shows solid<em> NH₄CI</em>. The right side shows gas <em>NH₄CI</em>.
Thus, the equation represents the <em>equilibrium</em> between the formation of <em>crystals</em> (solid) and <em>vapors </em>(gas) of the compound <em>NH₄CI</em>.
The change from solid state to gas state is represented by the <em>forward reaction </em>(fom left to the right). It is named sublimation.
The change from vapors to crystals (named deposition) is represented by the <em>reverse reaction</em> (from right to left).
<em>Dynamic equilibrium</em> means that the molecules continually form vapors and cristals at the same speed. Thus, the final result is that each the total number of molecules of vapors and the total number of molecules of crystals do not change.
In conclusion, <em>"The rate of sublimation of the NH₄CI crystals is equal to the rate of solidification of the NH₄CI vapors" (option C).</em>
Answer: b
. Covalent compounds can contain a maximum of 4 different atoms.
Explanation:
The covalent compounds are those compounds that are formed between the non-metals via sharing of electrons. The bonds so formed between these non-metallic atoms are covalent. There can be two or several different kinds of atoms that can form covalent bonds with each other in a single molecule. They use the valence electrons for sharing. The maximum number of valence electrons can be seven.