Answer:
f = 0.534×10⁻² Hz
Explanation:
Given data:
Frequency of wave= ?
Wavelength of wave = 5.62×10¹⁰ m
Solution:
Formula:
Speed of wave = wavelength × frequency
Speed of wave = 3×10¹⁷ nm/s
λ = 5.62×10¹⁰m×10⁹ nm/1 m = 5.62×10¹⁹ nm
Now we will put the values in formula.
3×10¹⁷ nm/s = 5.62×10¹⁹ nm × f
f = 3×10¹⁷ nm/s / 5.62×10¹⁹ nm
f = 0.534×10⁻² s⁻¹ or
f = 0.534×10⁻² Hz
The valence electrons are located in an atom's outermost energy level
<h3>Further explanation </h3>
In an atom, there are levels of energy in the shell and subshell
This energy level is expressed in the form of electron configurations.
Electrons fill the orbitals based on the Aufbau principle, namely the filling of electrons starts from the lowest energy level
Usually used in describing Lewis structures, placed around the element
Each orbital in an atom consists of 4 quantum numbers : n, l, ml, ms
Each electron has a different quantum number and this conforms to Pauli's rule: no electrons have the same 4 quantum numbers
Valence electrons are electrons used in a chemical bond , and in an atom's outermost energy level
Noble gas has a stable electron configuration of 8 valence electrons which guides the formation of chemical bonds called the octet rule
Answer:
the air mass will become colder
Explanation:
A maritime tropical air mass is moist and warm, while a continental polar air mass is dry and cold. ... When an air mass moves to a new region, it carries along its characteristic moisture and temperature. As the air moves over Earth's surface, the characteristics of the surface begin to change the air mass.
Answer: a. BaO
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here element barium is having an oxidation state of +2 called as 
cation and 
is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral 
Answer : The mass of sodium carbonate added to neutralize must be, 
Explanation :
First we have to calculate the moles of 
.
Given:
Molar mass of = 98 g/mole
Mass of = 
Conversion used : (1 kg = 1000 g)
Now put all the given values in the above expression, we get:
The moles of is, 
Now we have to calculate the moles of 
The balanced neutralization reaction is:
From the balanced chemical reaction we conclude that,
As, 1 mole of neutralizes 1 mole of
So, of neutralizes
Now we have to calculate the mass of
Molar mass of = 106 g/mole
Thus, the mass of sodium carbonate added to neutralize must be,
