First we need to find the number of moles that 43.9g of gallium metal is. We can do this by finding the molar weight of gallium and cross-multiplying to cancel out units:

So we are dealing with 0.63 moles of gallium metal.
We can take from the balanced equation that 4 moles of gallium metal will react completely with 3 moles of oxygen gas. We can take this ratio and make a proportion to find the amount of oxygen gas, in moles, that will react completely with 0.63 moles of gallium metal:

Cross multiply and solve for x:


So now we know that 0.47 moles of oxygen gas will react with 43.9g of gallium metal.
 
        
             
        
        
        
Answer:
Tornados could be possible or storms
Explanation:
 
        
             
        
        
        
Answer:
Alchemy is an ancient practice shrouded in mystery and secrecy. Its practitioners mainly sought to turn lead into gold.
Explanation:
 
        
             
        
        
        
Answer:
Cell division creates an equal number of cells in different parts of the body.
Explanation:
Cell division is the process by which a parent cell divides into two or more daughter cells. Cell division usually occurs as part of a larger cell cycle.
 
        
             
        
        
        
The student violated the aufbau principal as electron configurations must fill lowest energy levels before moving to the next level (3s2 comes before 3p2)