Answer:
To calculate the no. of moles you must know mass and molar mass of the product
Explanation:
# of moles = mass/molar mass
 
        
             
        
        
        
Explanation:
According to Le Chatelier's principle, any disturbance caused in an equilibrium reaction will shift the equilibrium in a direction that will oppose the change.
As the given reaction is as follows.
        
(a)   When increase the temperature of the reactants or system then equilibrium will shift in forward direction where there is less temperature. It is possible for an endothermic reaction.
Thus, formation of  will increase.
 will increase.
- (b)   When we decrease the volume (at constant temperature) of given reaction mixture then it implies that there will be increase in pressure of the system. So, equilibrium will shift in a direction where there will be decrease in composition of gaseous phase. That is, in the backward direction reaction will shift.
Hence, formation of  will decrease with decrease in volume.
 will decrease with decrease in volume.
- When we increase the mount of  then equilibrium will shift in the direction of decrease in concentration that is, in the forward direction. then equilibrium will shift in the direction of decrease in concentration that is, in the forward direction.
Thus, we can conclude that formation of  will increase then.
 will increase then.
 
        
             
        
        
        
The attraction mediated flow of water in the narrow tube has been termed as Capillary action. Thus, option A is correct.
The process of flowing up of liquid with the attraction force between the molecules and the surface has been achieved with the surface characteristics.
<h3>Movement of water in a narrow tube</h3>
The surface has the force of attraction with the flowing liquids in the sample. It results in the increased surface interaction, and the liquid flows up in the tube against gravity.
The movement of the liquid in the water through a narrow tube has been termed as capillary action. Thus, option A is correct.
Learn more about movement of water, here:
brainly.com/question/1295312
 
        
             
        
        
        
Answer:
The boiling  point of a 8.5 m solution of Mg3(PO4)2 in water is<u> 394.91 K.</u>
Explanation: 
The formula for molal boiling Point elevation is :

 = elevation in boiling Point
 = elevation in boiling Point
 = Boiling point constant( ebullioscopic constant)
 = Boiling point constant( ebullioscopic constant) 
m = molality of the solution
<em>i =</em> Van't Hoff Factor 
Van't Hoff Factor = It takes into accounts,The abnormal values of Temperature change due to association and dissociation .
In solution Mg3(PO4)2 dissociates as follow :

Total ions after dissociation in solution :
= 3 ions of Mg + 2 ions of phosphate 
Total ions = 5 
<em>i =</em> Van't Hoff Factor = 5
m = 8.5 m
 = 0.512 °C/m
 = 0.512 °C/m
Insert the values and calculate temperature change:



Boiling point of pure water = 100°C = 273.15 +100 = 373.15 K

 = 373.15 K[/tex]
 = 373.15 K[/tex]
21.76 = T - 373.15
T = 373.15 + 21.76
T =394.91 K
 
        
             
        
        
        
Remember that: 
number of moles = mass/molar mass
First, we get the molar mass of the nitrogen gas molecule:
It is known the the nitrogen gas is composed of two nitrogen atoms, each with molar mass 14 gm (from the periodic table)
Therefore, molar mass of nitrogen gas = 14 x 2 = 28 gm
Second we calculate the mass of the precipitate:
we have number of moles = 0.03 moles (given)
and molar mass = 28 gm (calculated)
Using the equation mentioned before,
mass = number of moles x molar mass = 0.03 x 28 = 0.84 gm