Answer:
A
Explanation:
frequency is the product of time and wave length
Answer:
A
Explanation:
When a temperature increases particles tend to collide with each other often as they gain kinetic energy making them collide much more often and they'll collide with more energy due to the increase of kinetic energy
Answer:
the packing efficiency is 52.36%
Explanation:
Given the data in the question;
simple cubic unit cell that contains one atom with a metallic radius of 175 pm;
we know that;
Edge length of Simple cubic (a) is related to radius of atom (r) as follows;
a = 2r
since radius r = 175 pm
we substitute
a = 2 × 175 pm
a = 350 pm
Now we get the volume unit;
Volume of unit cell = a³ = ( 350 pm ) = 42875000 pm³
Next we get Volume of sphere;
Volume of Sphere =
πr³
Volume occupied by 1 atom =
× π × ( 175 pm )³
=
× π × 5359375 pm³
= 22449297.5 pm³
Now, the packing efficiency = ( Volume occupied by 1 atom / Volume of unit cell ) × 100
we substitute;
packing efficiency = ( 22449297.5 pm³ / 42875000 pm³ ) × 100
= 0.523598 × 100
= 52.36%
Therefore, the packing efficiency is 52.36%
I don’t know what your talking about
Answerr
Explaination
1. Inorganic combustion
2. Organic combustion
<h3>Further explanation</h3>
Given
The chemical equations
Required
Balanced equation
Solution
Organic compounds have the characteristic that there is a chain of carbon atoms, while inorganic does not have a chain of carbon atoms
The reaction of a substance with oxygen is called a combustion reaction
Complete combustion of carbon compounds will get CO₂ gas, whereas if it is not complete it will produce CO gas
So Organic : contain a carbon atom (and often a hydrogen atom)
1. Ca + O₂ ⇒ CaO₂
Inorganic combustion⇒does not contain carbon
2. C₃H₂O + 3O₂ → 3CO₂ + H₂O
Organic combustion