Chemical- it produces ammonia.
        
             
        
        
        
B is gas 
The chemical element krypton is classed as a noble gas and a nonmetal.
Love you 
        
             
        
        
        
Answer:
false
Explanation:
Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.
 
        
             
        
        
        
Answer:
81 gm
Explanation:
The mass of 1 mole is 27 g 
So, Mass of 3 moles of Aluminium would be 3 × 27 = 81 gm..Thus mass of 3 Moles of Aluminium is 81 gm.