So the empirical formula is Mg3N2
 
        
             
        
        
        
There are 5 steps: 
1- measure the mass of the container 
2- measure the volume of the liquid 
3- measure the combined mass of the liquid and the container. 
4-determine the mass of the liquid alone 
5-divide the mass by the volume.
        
             
        
        
        
Answer:
4.12 mol  
Explanation:
Given data:
Moles of LiOH  required = ?
Volume of solution = 4.2 L
Molarity of solution = 0.98 M
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
we will calculate the moles from above given formula.
0.98 M = number of moles / 4.2 L
0.98 M × 4.2 L = number of moles
Number of moles = 0.98 M × 4.2 L 
Number of moles = 4.12 mol     (M = mol/L)
 
        
             
        
        
        
Answer:
C. The reaction is energetically favorable.
Explanation:
The reaction which shows the removal of the terminal phosphate from the ATP is shown below:

The Gibbs' free energy change of this reaction, 
Hence, Option A is not correct.
It is a type of hydrolysis reaction in which water is being added to the molecule. 
Hence, Option B is not correct.
The Gibbs' free energy change is negative which means that the reaction is energetically favorable.
Option C is correct.