Answer:
d The energy from the sun heated the water, causing it to evaporate.
Explanation:
The correct description of what happened is that the energy from the sun heated the water and causes it to evaporate completely.
Evaporation is a phase change process in which liquid is converted to gases. This occurs when a liquid gains considerable amount of energy. The molecules then breaks free from the bond holding compound place.
- Option A is wrong because the energy from the sun does not cause condensation i.e. change from gas to liquid.
- The water on the seat does not boil, it simply evaporates. So, option B is wrong.
- When heat energy is added, it does not cause cooling of water. So option C is wrong.
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>
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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>
Milk is best described as a colloid because colloids are mixtures that have particles that do not settle out. Colloids are also not large enough to be easily filtered out, yet they are big enough to be able to scatter light, therefore making the mixture seem cloudy.
Earlier species thanks to evolution. hope this helped!
Answer:
2
Explanation:
The compound H2CCH2 has the condensed formula C2H4. The name of the compound is ethene. The compound is unsaturated, that is, it contains multiple bonds. The compound has a formula which fits into the general molecular formulae of alkenes (olefins) which his CnH2n.
Olefins have a double bonds between the carbon atoms. That is , the two carbon atoms in Olefins are connected via a double covalent bond. This now implies that the two carbon atoms in ethene (C2H4) are connected by two covalent bonds in the lewis structure of the molecule as is common for Olefins.