Hey buddy I am here to help!
1. C
2. A
3. A & B
4. C
5. C
6. A
7. A
8. A & C
Hope it helps!
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Answer:
The concentration of the solution is 1.364 molar.
Explanation:
Volume of perchloric acid = 29.1 mL
Mass of the solution = m
Density of the solution = 1.67 g/mL

Percentage of perchloric acid in 48.597 solution :70.5 %
Mass of perchloric acid in 48.597 solution :
= 
Moles of perchloric acid = 
In 29.1 mL of solution water is added and volume was changed to 250 mL.
So, volume of the final solution = 250 mL = 0.250 L (1 mL = 0.001 L)


The concentration of the solution is 1.364 molar.
 
        
             
        
        
        
1.0×10^−15/4.2×10^−7=<span>2.3809524e-23 Hoped I helped!</span>
        
             
        
        
        
Answer:17.955atm
Explanation:Pv=nrt
P= nrt/v
P= 7.25*0.08205*360/11.90
P= 214.1505/11.90
P=17.995atm
 
        
             
        
        
        
Given the mass of  =25.6 g
=25.6 g
The molar mass of  =390.35g/mol
=390.35g/mol
Converting mass of  to moles:
to moles:

Converting mol  to mol S:
to mol S:

Converting mol S to atoms of S using Avogadro's number:
1 mol = 
