How many grams of diazine (N2H2) are there in 2.55 mol of the compound
1 answer:
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Answer:
The correct option is;
D.) The molecular masses of the gases, because the gas molecules have the same average kinetic energy and mass can be calculated using the equation,
Explanation:
The graph shows the proportion of the atoms of each gas have a given velocity
The given parameters of the graphs are;
The dependent variable of the graph = The number of molecules
The independent variable = The molecular speed (m/s)
The temperature of the gases = The same temperature
Therefore, from the above equation, at constant temperature, the root mean square velocity varies inversely as the molecular weight
Similarly from the kinetic energy equation, we have;
Whereby, the energy contained in each of the four gas are the same, we have;
For increasing molecular mass by a factor of 2, the velocity decreases by a factor of 4.
Answer: Option D is correct.
Explanation: Equation given by de Broglie is:
where, = wavelength of the particle
h = Planck's constant
m = mass of the particle
v = velocity of the particle
In option A, football will have some mass and is moving with a velocity of 25 m/s, hence it will have some wavelength.
In Option B, unladen swallow also have some mass and is moving with a velocity of 38 km/hr, hence it will also have some wavelength.
In Option C, a person has some mass and is running with a velocity of 7 m/hr, hence it will also have some wavelength.
As, the momentum of these particles are large, therefore the wavelength will be of small magnitude and hence, is not observable.
From the above, it is clearly visible that all the options are having some wavelength, so option D is correct.