Isolated i believe dont hold me to that
        
             
        
        
        
Balanced Eqn
2
C
2
H
6
+
7
O
2
=
4
C
O
2
+
6
H
2
O
By the Balanced eqn
60g ethane requires 7x32= 224g oxygen
here ethane is in excess.oxygen will be fully consumed
hence
300g oxygen will consume  
60
⋅
300
224
=
80.36
g
 ethane
leaving (270-80.36)= 189.64 g ethane.
By the Balanced eqn
60g ethane produces 4x44 g CO2
hence amount of CO2 produced =
4
⋅
44
⋅
80.36
60
=
235.72
g
and its no. of moles will be  
235.72
44
 =5.36 where 44 is the molar mass of Carbon dioxide
hope this helps
 
        
             
        
        
        
Answer:
the systematic name is called Lithium sulfide.
 
        
             
        
        
        
Answer:
Here's what I get  
Explanation:
The modern periodic law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers.
 
        
             
        
        
        
Because the coldness in  the ice cream and the suns gamma rays are hitting the ice cream and then it will start to melt. and that is why ice cream melts.