Answer:
            Six electrons are transferred in the formation of Al₂O₃.
Explanation:
                   Aluminium metal and Oxygen react to form Al₂O₃ as,
                                2 Al  +  3/2 O₂    →    Al₂O₃
Oxidation number of Al on left hand side is zero, while than on right hand side in Al₂O₃ is +3. Means it has lost 3 electrons per one atom and six electrons per two atoms. Also, the oxidation number of O at left hand side in O₂ is zero, while that in Al₂O₃ it is -2 per atom and -6 per 3 atoms. 
So, two Al atoms have lost 6 electrons and 3 O atoms have gained six electrons.
        
             
        
        
        
I guess examples of solid and gas???? You have to be more descriptive.....
        
             
        
        
        
Answer: On the basis of electrical conductivity, materials are classified as conductors, semi-conductors and non-conductors. Conductors : Substances through which electricity can easily pass through are known as conductors. ... For example, glass, wood are non-conductors. Wood is used to make tables, desks etc.
 
        
             
        
        
        
Mass of ammonia produced : 121.38 g
<h3>Further explanation</h3>
Given
Reaction
3H₂(g) + N₂(g) ⇒ 2NH₃(g)
100g of N₂
Required
Ammonia produced
Solution
mol of N₂ :

From the equation, mol ratio of N₂ and NH₃ = 1 : 2, so mol NH₃ :

mass of NH₃(MW=17 g/mol) :

 
        
             
        
        
        
Answer: b
explanation: i had the question on a test and got it right.