True. Mental health should be factored into any quality of life
        
                    
             
        
        
        
The pH of the substance is 3.3 which is acidic.
<h3>What is pH?</h3>
The pH of a substance or solution is referred to the degree of acidity or alkalinity of that substance. It is measured on a scale of 0 -14.
Given  the concentration of hydrogen ions as 5. 0 × 10–4 moles per liter,we  use the formulae
 ph = –log[h+]
plugging in thge value of  h+ as 5. 0 × 10–4 moles per liter we have:
pH = –log{5. 0 × 10–4 ]
pH=3.3
See here for calculation of pHs: brainly.com/question/26430079 
 
        
             
        
        
        
<span> set by the experimenter, then the effect is said to be significant</span>