Out of the four answers, only increasing the temperature will speed up the dissolution rate. The 4th option will increase the total amount of solute that can be dissolved but will not affect the dissolution rate. The 1st and 3rd options are just wrong.
Hydrogen molecules are made up of only one element (hydrogen).
Water molecules, H₂O, are compounds because they are made up of more than one element, hydrogen and oxygen.
The answer should be B.
When a solid needs to melt, it must absorb enough heat for first, to raise the temperature, and second, to break the bonding. That's why the particles will have a weaker force of attraction to each other. In liquid, the particles will be more free comparing to solid. This type of heat required is called latent heat in specific. It's the heat required to break bonds, or attract bonds when cooling down.
Note that different materials has different specific latent heat for both melting (including freezing) and condensing (including melting).
Answer:
A high difference in electronegativity will be present in ionic compounds since the electrons are transffered from the element less electronegative to the element more electronegative.
A small difference in electronegativity is present in molecular compounds (covalent bonds). None of the elements is strong enough to attract the electrons so the electrons are shared.
Explanation:
A high difference in electronegativity will be present in ionic compounds since the electrons are transffered from the element less electronegative to the element more electronegative.
A small difference in electronegativity is present in molecular compounds (covalent bonds). None of the elements is strong enough to attract the electrons so the electrons are shared.
This problem is providing the mass, specific heat and melting point of aluminum and the amount of heat it receives in a heating process so it asks for the change in its temperature, which results in 64.36 °C.
<h3>Calorimetry</h3>
In chemistry, one can perform calorimetry calculations with the widely-known heat equation relating mass, specific heat, temperature and heat:
Thus, when having 1250.0 g of aluminum at -35.0 °C and supplying 72.41 kJ (72,410 J) of heat, we will be able to solve for the change in temperature by solving for it in the previous formula:
Which is not as high as for it to provoke a melting change, with the correct significant figures as 0.90 do not contribute to this for being a theoretical number.
Learn more about calorimetry: brainly.com/question/1407669