Answer:
Based on the information, the comparison of characteristics of two substances is as follow:
Substance A:
- Has a higher boiling point
- Has a higher heat of vaporization
Substance B:
- Has weaker intermolecular forces
- Is a gas at 300 mmHg
Explanation:
- The substance A has vapor pressure 275 mmHg so it has low vapor as compared to substance B so it has higher boiling point and has higher heat of vaporization.
- The substance B has vapor pressure of 459 mmHg so it has weaker intermolecular forces as compared to substance A and also it is a gas at 300 mmHg.
Among many factors, the concentration of reactant is also responsible for effecting the rate of reaction. And it is found that the rate of reaction is directly proportional to the rate of reaction.
Explanation:
Higher concentration means greater number of reactants in the system. Greater the number greater will be the probability of reactants to colloid. And according to collision theory reactants must colloid with optimum kinetic energy and orientation. So, in higher concentrated system the rate of collisions increases with increasing the rate of reaction.
Result:
Option <span>A is correct answer. (The increased concentration increases the number of collisions between molecules.)</span>
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To find moles Mass (NaOH) / RMM (NaOH)
so moles of NaOH = 0.98 / 40 = 0.0245mol
hope that helps
