In which state do molecules have the highest kinetic energy? in the liquid state in the solid state in the gaseous state during
2 answers:
Answer: Option (c) is the correct answer.
Explanation:
Kinetic energy is defined as the energy obtained by an object or substance due to their motion.
Also, kinetic energy is directly related to temperature as follows.
K. E =
Hence, kinetic energy is directly proportional to temperature.
So, more is the temperature provided to a substance more will be the kinetic energy of its molecules. Therefore, more will be their motion and this leads to more number of collisions between the molecules.
As in solids, molecules are held by strong intermoleculear forces so, they do not move from their initial position and hence, they have definite shape and volume.
In liquids, molecules are held by less strong intermolecular forces of attraction. So, they have definite volume but no definite shape.
In gases, molecules are held by weak intermolecular forces. So, these molecules are away from each other due to high kinetic energy as they have more number of collisions.
Thus, we can conclude that in the gaseous state molecules have the highest kinetic energy.
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The empirical formula : MnO₂.
<h3>Further explanation</h3>Given
632mg of manganese(Mn) = 0.632 g
368mg of oxygen(O) = 0.368 g
M Mn = 55
M O = 16
Required
The empirical formula
Solution
You didn't include the pictures, but the steps for finding the empirical formula are generally the same
- Find mol(mass : atomic mass)
Mn : 0.632 : 55 = 0.0115
O : 0.368 : 16 =0.023
- Divide by the smallest mol(Mn=0.0115)
Mn : O =
The empirical formula : MnO₂
Answer:
Explanation:
Hello,
In this case, since the chemical reaction is:
We can see that hydrochloric acid and magnesium hydroxide are in a 2:1 mole ratio, which means that the neutralization point, we can write:
In such a way, the moles of magnesium hydroxide (molar mass 58.3 g/mol) in 500 mg are:
Next, since the pH of hydrochloric acid is 1.25, the concentration of H⁺ as well as the acid (strong acid) is:
Then, since the concentration and the volume define the moles, we can write:
Therefore, the neutralized volume turns out:
Best regards.