Answer:
A. 2.82 eV
B. 439nm
C. 59.5 angstroms
Explanation:
A. To calculate the energy of the photon emitted you use the following formula:
(1)
n1: final state = 5
n2: initial state = 2
Where the energy is electron volts. You replace the values of n1 and n2 in the equation (1):
B. The energy of the emitted photon is given by the following formula:
(2)
h: Planck's constant = 6.62*10^{-34} kgm^2/s
c: speed of light = 3*10^8 m/s
λ: wavelength of the photon
You first convert the energy from eV to J:
Next, you use the equation (2) and solve for λ:
C. The radius of the orbit is given by:
(3)
where ao is the Bohr's radius = 2.380 Angstroms
You use the equation (3) with n=5:
hence, the radius of the atom in its 5-th state is 59.5 anstrongs
Answer:
Explanation:
Given
mass of tin 
Also we know that
specific heat of tin 
Melting Point of Tin 
Heat required to raise the temperature of 100 gm tin is given by
where 
Answer:
10.6962 ml
Explanation:
the density of water is 1g/ml
if you devide the mass by density you get the volume the volume times density is equal to the mass so
84.5 grams devided by 7.9 is equal to 10.6962 ml.
if you do that times 1g/ml is equal to 10.6962 g/ml.
Answer:
A) 7500[N]
Explanation:
This is a problem where we have to apply the pascal principle, in this case replace the given values in the given equation:
F1 = 2500 [N]
A1 = 0.06 [m^2]
A2 = 0.18 [m^2]
![F_{2}=A_{2}*\frac{F_{1}}{A_{1}} \\F_{2}=0.18*\frac{2500}{0.06}\\ F_{2}= 7500[N]](https://tex.z-dn.net/?f=F_%7B2%7D%3DA_%7B2%7D%2A%5Cfrac%7BF_%7B1%7D%7D%7BA_%7B1%7D%7D%20%5C%5CF_%7B2%7D%3D0.18%2A%5Cfrac%7B2500%7D%7B0.06%7D%5C%5C%20F_%7B2%7D%3D%207500%5BN%5D)
Answer:
1. Periods; that are what horizontal rows on a periodic table are called.
2. Each period represents the number of levels
Explanation:
