Answer : The percent error caused by this mistake is, 0.73%
Solution : Given,
Actual volume = 21.86 ml
Measured volume = 21.7 ml
Formula used for percent error :
Now put all the values in this formula, we get the percent error.
Therefore, the percent error caused by this mistake is, 0.73%
Answer:
The answer is 434nm
Explanation:
The Rydberg equation is an empirical relationship expressed by Balmer and Rydberg which is stated as:
1/λ = .............................. (1)
where λ is the wavelength, is the Rydberg constant equal to
, n is the transition level number, the subscript f and i are the final and initial levels respectively. Therefore for final transition n = 2 and for initial transition n = 5.
Making substitutions into equation (1), gives
1/λ =
=
=
=
= 2303700
∴ λ =
Converting to nm, we have
λ =
Therefore, the wavelength of the emitted photon is 434nm
Answer : The correct option is, (D)
Solution :
Formula used :
where,
Q = heat released = -1300 J
m = mass of water = 40 g
c = specific heat of water =
= final temperature = ?
= initial temperature =
Now put all the given values in the above formula, we get the final temperature of water.
Therefore, the final temperature of the water is,
