Answer:
The physical process of evaporation involves (1) addition of heat energy and (2) increase in entropy
Explanation:
During evaporation, liquid molecules convert into gas molecules. As gas molecules has negligible intermolecular force as compared to liquid molecules therefore heat energy has to be applied to separate liquid molecules by breaking intermolecular force and convert them into gas
Again, gas molecules are free to move. Hence they possesses more degrees of freedom. Therefore gas molecules have higher entropy than liquid molecules. So entropy increases during evaporation.
When anything turns from a liquid to a gas, evaporation occurs. Water evaporates when it is heated. The molecules move and vibrate at such a rapid rate that they release water vapour molecules into the atmosphere. The physical process of evaporation involves an increase in entropy .
Liquid molecules change into gas molecules during evaporation. Since gas molecules have a far lower intermolecular force than liquid molecules, heat energy must be used to dissolve the bonds between liquid molecules and turn them into gas.
Gas molecules can travel freely once more. As a result, they have more degrees of freedom. As a result, the entropy of gas molecules is larger than that of liquid molecules. As a result, entropy grows during evaporation.
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The given Lewis structure does not show valid resonance form. So,the given statement is false.
The Lewis structure is the representation of the of valence shell in the molecule.
The electron present in outermost shell and which involve in chemical bond formation is called valence electron.
Resonance is way to explain the localisation of electron in molecule where Lewis formula fails to describe.
The given statement is false because both structure shows different number of valence electron.
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Answer:
true
Explanation:
because Lewis represent valid resonance
Answer: A) calcite
Explanation:
Hardness can be defined as the ability of the mineral to resist the scratch. It is the property to judge the hardness of the mineral. Mineralogist study this property of hardness using Mohs hardness scale.
Talc is the least hard substance after that gypsum, then calcite, fluorite, and then apatite.
The gypsum can be scratched by the calcite but the calcite cannot scratch apatite as it is softer than apatite.
The symbol for the compound dinitrogen trisulfide is N2S3. It is derived from the number of nitrogen and sulfur atoms present in the compound.
The chemical compound dinitrogen trisulfide is composed of two elements: nitrogen (N) and sulfur (S). When we name the compound according to IUPAC nomenclature rules, we consider the number of each type of atom present. Dinitrogen means there are two nitrogen atoms, represented by the subscript 2, and trisulfide implies that there are three sulfur atoms, signified by the subscript 3. Hence, the symbol or chemical formula for dinitrogen trisulfide is N2S3.
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With high cholesterol, you can develop fatty deposits in your blood vessels. Eventually, these deposits grow, making it difficult for enough blood to flow through your arteries. Sometimes, those deposits can break suddenly and form a clot that causes a heart attack or stroke.
Answer:
Cholesterol is a waxy substance found in your blood. Your body needs cholesterol to build healthy cells, but high levels of cholesterol can increase your risk of heart disease.
With high cholesterol, you can develop fatty deposits in your blood vessels. Eventually, these deposits grow, making it difficult for enough blood to flow through your arteries. Sometimes, those deposits can break suddenly and form a clot that causes a heart attack or stroke.
Explanation:
High cholesterol can cause a dangerous accumulation of cholesterol and other deposits on the walls of your arteries (atherosclerosis). These deposits (plaques) can reduce blood flow through your arteries, which can cause complications, such as:
Chest pain. If the arteries that supply your heart with blood (coronary arteries) are affected, you might have chest pain (angina) and other symptoms of coronary artery disease.
Heart attack. If plaques tear or rupture, a blood clot can form at the plaque-rupture site — blocking the flow of blood or breaking free and plugging an artery downstream. If blood flow to part of your heart stops, you'll have a heart attack.
Stroke. Similar to a heart attack, a stroke occurs when a blood clot blocks blood flow to part of your brain.
a. True
b. False
Answer:
Explanation:
1) Increase the amount of charge on each object
2) Decrease the distance between each object
3) Increase the mass of the objects.
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