Its true :)
i take chemistry rn lol
        
             
        
        
        
If he was 30.8% too low, it means that he was at 69.2% of the boiling point needed. So 50o C is 69.2% of total.
In order to know what 100% is, you can divide the number by it's percentage and then multiply it by a hundred.
So: 50/30.8=1.623
1.623*100=162.3
So the correct boiling point of the liquid he was working with in the lab is 162.3 oC
        
                    
             
        
        
        
Answer:
The student's speed is 60 mph.
Explanation:
All you have to do is divide: 260/4 = 60 mph. 
 
        
             
        
        
        
Answer: chemical energy is converted to heat and light energy
Explanation: exothermic reaction 
4CH3+7O2–>6 H2O+4CO2+energy