Answer:
[K₂CrO₄] → 8.1×10⁻⁵ M
Explanation:
First of all, you may know that if you dilute, molarity must decrease.
In the first solution we need to calculate the mmoles:
M = mmol/mL
mL . M = mmol 
0.0027 mmol/mL . 3mL = 0.0081 mmoles
These mmoles  of potassium chromate are in 3 mL but, it stays in 100 mL too.
New molarity is:
0.0081 mmoles / 100mL = 8.1×10⁻⁵ M 
 
        
             
        
        
        
Answer:
The answer is

Explanation:
The energy of a quantum of light can be found by using the formula
<h3>E = hf</h3>
where
E is the energy
f is the frequency
h is the Planck's constant which is 
6.626 × 10-³⁴ Js
From the question
f = 4.31 × 10¹⁴ Hz
We have
E = 4.31 × 10¹⁴ × 6.626 × 10-³⁴
We have the final answer as

Hope this helps you
 
        
             
        
        
        
a chemical property of iron is the ability to change it, hammer it, roll it, shape it etc
 
        
                    
             
        
        
        
Answer:
c
Explanation:
the reason is because your a homosiejenenddj
 
        
             
        
        
        
<span>Calcium phosphide hope this helped </span>