Answer:
236 g/mol
Explanation:
This question is asking to calculate the molar mass/formula mass of calcium nitrate tetrahydrate with the chemical formula: Ca(NO3)2 · 4H20. This is done as follows:
Atomic mass of the constituent elements are as follows:
Ca = 40
N = 14
O = 16
H = 1
Hence, in Ca(NO3)2 · 4H20.
= 40 + {14 + 16(3)}2 + 4 {1(2) + 16}
= 40 + {14 + 48}2 + 4{2 + 16}
= 40 + {62}2 + 4{18}
= 40 + 124 + 72
= 236
Hence, the molar mass of Ca(NO3)2 · 4H20 is 236g/mol.
Given information:
Central atom = X
# lone pairs on X = 2
# bonds by X = 2 i.e 2 X-Y bonds.
The structure can be represented as Y-:X:-Y
It can be abbreviated as XY2Z2 where Z2 represents the two lone pairs on the central atom X.
Based on the electron geometry which accounts for the 2 two pairs and the 2 bonds, the central atom X would be sp3 hybridized with a tetrahedral geometry
From a molecular geometry perspective (which does not consider the lone pairs), the structure would be linear.
When the student crushes sugar there there occurs an increase in the number of molecules or particles of sugar. This means that now more number of sugar particles (solute) are able to interact with water (solvent).
Therefore, there will be more number of collisions taking place between the solute and solvent molecules.
As a result, sugar will dissolve readily into water as there is an increase in interaction between solute and solvent particles.
Thus, we can conclude that when he crushes the sugar and then stirs it into the water then it will work as this leads to more interaction or collisions between the solute and solvent particles.
The answers for your question is :
Kinetic Energy.
Why?
It’s because they all move
Happier hshsh my sis are coming over later this