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Which of the following pairs of substances can be broken down chemically?  a. Ammonia and iron b. Helium and argon c. Methane and water d. Potassium and lithium e. Water and carbon
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Which of the following pairs of substances can be broken down chemically? 

a. Ammonia and iron 
b. Helium and argon 
c. Methane and water
d. Potassium and lithium
e. Water and carbon

User Jonan Gueorguiev
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1 Answer

6 votes
Methane and water because they are both compounds
User Splendid
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