Answer:
6.76 moles.
Explanation:
2CO(g)+O2 (g) =2CO2(g)
When 2 CO mols were reacted with excess O2 then 2 mols of CO2 is created.
Therefore if 6.76 moles reacted, same number of CO2 will be created.
 
        
             
        
        
        
Answer: Order of the elements from most reactive to least reactive is:
Mg >  Zn > Fe > H > Cu
Explanation: Reactivity of the elements is the tendency of the elements to loose or gain electrons with ease.
As, all the given elements are metals, so the metals which will loose electrons easily will be more reactive. To study the reactivity of metals, we use reactivity series.
The metals which are more reactive are placed on the top of the reactivity series and which are less reactive are placed at the bottom.
Hence, the order of the elements from most reactive to least reactive is:
Mg >  Zn > Fe > H > Cu
Reactivity series is attached below.
 
        
             
        
        
        
Answer:
the mass number is the number of protons and neutrons added and the average atomic mass is the weight of the protons and neutrons
 
        
             
        
        
        
He used prisms to demonstrate how white light is in fact made