There are many examples of chemical equilibrium all around you. One example is a bottle of fizzy cooldrink. In the bottle there is carbon dioxide (CO2) dissolved in the liquid. There is also CO2 gas in the space between the liquid and the cap
Answer:
option b is correct option = (6.76×10¹⁴ Hz)
Explanation:
Given data:
Wavelength of photon = 4.42×10⁻⁷ m
Speed of light = 2.99×10⁸ m/s
Frequency of radiation = ?
Solution:
Formula:
Speed of wave = frequency × wavelength
Now we will rearrange this formula.
frequency = Speed of wave / wavelength
f = c/ λ
f = 2.99×10⁸ m/s / 4.42×10⁻⁷ m
f = 0.676×10¹⁵ Hz (s⁻¹ = Hz)
f = 6.76×10¹⁴ Hz
Thus option b is correct option.
Question:
The relative humidity of air equals the ratio of the partial pressure of water in the air to the equilibrium vapor pressure of water at the same temperature times 100%. If the relative humidity of the air is 58% and its temperature is 68 oF , how many moles of water are present in a room measuring 12 ft x 10 ft x 8 ft?
Answer:
15.1379 moles of water are present in a room measuring 12 ft x 10 ft x 8 ft.
Explanation:
Given:
Relative humidity of the air = 58%
Temperature =
To Find:
Number of moles of water are present in a room measuring 12 ft x 10 ft x 8 ft = ?
Solution:
Converting temperature Fahrenheit to Celsius
The vapour pressure of is equal to 17.54 torr
vapour pressure of air
= torr
= 10.17132 torr
Volume of the room =
=>
=>
Using the ideal gas equation
PV = nRT
Volume in Litres = 27184.2 L
Pressure in atm
=
= 0.0133945 atm
Now substituting the values we get
Pv = nRT
n = 15.1379 moles
Answer:
New pressure is 5.40 atm
Explanation:
When T° and moles remain constant, we should use these relation to determine pressure, or also volume
P₁ . V₁ = P₂ . V₂
1.80 atm . 3L = P₂ . 1L
(1.80 atm . 3L ) / 1L = P₂
5.40 atm = P₂
Answer:
²⁸Mg
Explanation:
12 electrons means it is a Mg;
A typical Mg has 12 neutrons, but this has 16 hence it must be an isotope with 4 extra neutrons.