Answer:
43.96secs
Explanation:
M1 = molar mass of NH3 = 14 + (3x1) = 14 + 3 = 17g/mol
t1 = time for NH3 to diffuse = 30secs
M2 = molar mass of HCl = 1 + 35.5 = 36.5g/mol
t2 = time for HCl to diffuse =?
From Graham's law of diffusion:
t2/t1 = √(M2/M1)
t2/30 = √(36.5/17)
t2/30 = 1.465
Cross multiply
t2 = 30 x 1.465
t2 = 43.96secs
Therefore it will take 43.96secs for the damp blue litmus paper to change colour for HCl.
Yes since for atoms to be of the same element , they must have the same number of protons inside their nucleus . This means that 1- they will all have the same nucleon number ( mass number ) and that 2-they will all have the same number of electrons in their outermost shell which determines the chemical properties of the atom.
Answer:
The value of dissociation constant of an acid .
Explanation:
The of an acid = -5.7
The dissociation constant of the reaction =
The relation between and is given by ;
The value of dissociation constant of an acid .
Answer:
Explanation:
1. Find the order of reaction
Use information from the graph to find the order.
If a plot of ln[A] vs time is linear, the reaction is first order and the slope = -k.
2. Find the half-life
Answer : The energy of one photon of light is .
Solution : Given,
Frequency = (1Hz = 1 second period)
Formula used :
where,
E = energy
h = Planck's constant =
= frequency
Now put the given values in above formula, we the value for energy of one photon.
Therefore, the energy of one photon of light is .