Answer:
Proton is a sub atomic particle while oxygen is an atom ....
The correct answer is A. Urban areas have higher temperatures.
Explanation
Urban Area is a term to refer to cities. Urban areas are characterized by having a developed infrastructure (wide roads, vehicular bridges, wide platforms, tall buildings, residential areas, industrial areas, among others).
Recent studies affirm that urban areas are warmer than surrounding areas; This phenomenon is because the materials with are built buildings, roads, houses, and others, concentrate the sun's rays, increasing the temperature of cities. In addition, the lack of trees deepens this phenomenon, because the trees contribute to cooling by physicochemical processes such as evapotranspiration.
According to the above, it is possible to affirm that urban areas are hotter than their surrounding area because they lack vegetation, and the materials with which it is built contribute to the increase in temperature.
On the other hand, urban areas are characterized by habitat fragmentation, more problems with soil erosion, and less rain infiltration into the soil.
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The answer is B I’m pretty sure
The answer is 4.9 moles of salt will be needed to add to 1 kg of water to change the boiling point by 5 °C.
<h3>What is Boiling Point Elevation ?</h3>
Boiling point elevation is the phenomenon that occurs when the boiling point of a liquid (a solvent) is increased when another compound is added, such that the solution has a higher boiling point than the pure solvent.
Boiling point elevation occurs whenever a non-volatile solute is added to a pure solvent.
ΔT = i * Kb * m
where m, Kb and i are the molality of solution, ebullioscopic constant and Van't Hoff factor respectively
The data given in the question is ΔT = 5 °C
mass of solvent = 1 kg
Kb = 0.51 °C/(mol/kg)
Van't Hoff Factor for NaCl is 2
Substituting the values in the above equation


moles of salt = 4.9
Therefore 4.9 moles of salt will be needed to add to 1 kg of water to change the boiling point by 5 °C.
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