Answer:
0.4M NaOH
Explanation:
Molarity, M, is an unit of concentration widely used defined as the ratio between moles of solute (In this case, NaOH) and volume of solution in liters.
As the solution contains 2 moles of NaOH-Moles of solute- in 5L of solution, the molarity is:
2 moles NaOH /  5L = 
<h3>0.4M NaOH</h3>
 
        
             
        
        
        
Answer:
Option D which is Sn4- is the answer
 
        
             
        
        
        
Answer:
Percent yield =  90.5% 
Explanation:
Given data:
Mass of carbon dioxide = 500 g
Mass of water = excess 
Actual yield of carbonic acid = 640 g
Percent yield = ?
Solution:
Balanced chemical equation:
CO₂ + H₂O  → H₂CO₃
Number of moles of carbon dioxide
Number of moles  = Mass / molar mass
Number of moles = 500 g/ 44 g/mol
Number of moles = 11.4 mol
Now we will compare the moles of H₂CO₃ with CO₂.
                               CO₂          :              H₂CO₃
                                  1             :                  1
                                11.4           :                11.4
Mass of carbonic acid:
Mass = number of moles × molar mass
Mass = 11.4 mol × 62.03 g/mol
Mass = 707.14 g
Percent yield:
Percent yield = actual yield / theoretical yield × 100
Percent yield =  640 g/ 707.14 g × 100
Percent yield =  90.5% 
 
        
             
        
        
        
Answer:
3.01 × 10^24 particles
Explanation:
According to Avagadro, in one mole of a substance, there are 6.02 × 10^23 atoms or particles. 
Using the formula: N = n × NA
Where;
N= number of particles or atoms
n = number of moles
NA = Avagadro's constant or number
This means that for 5 moles of a substance, there will be:
5 × 6.02 × 10^23 
= 30.1 × 10^23
= 3.01 × 10^24 particles