Https://us-static.z-dn.net/files/d49/33d4ec86853ef95e6f6c14242c663be4.png
The net ionic equation of the reaction could be determined by cancelling out the like ions between both sides of the reaction. These ions are called spectator ions. They are called as such because they do not actively participate in the reaction. The spectator ions are Na+ and Cl-. When you cancel those, the equation would become letter D.
Answer: 1/12
1/4 divided by 3/1
KCF:Keep the first fraction, Change the sign to muplication, Flip the second fraction.
1/4* 31
1*1=1
4*3=12
1/12
Answer:
The value is 
Explanation:
From the question we are told that
mass of carbon dioxide produced by one gallon of gasoline is 
The number of cars is 
The distance covered by each car is 
The rate is 
Generally the amount of gasoline used by one car is mathematically represented as

=> 
=> 
Generally the amount of gasoline used by N cars is

=> 
=> 
Generally the annual production of carbon dioxide is mathematically represented as

=> 
=> 