Answer: (2) CO
Co, Cr, and Cu are elements. Elements cannot be broken down by a chemical change, but compounds can. Since CO is a compound, it can be decomposed by a chemical change.
        
             
        
        
        
Answer: amount = 2466.95L
Explanation:
given that the speed is = 1900./kmh i.e. 1hr/900km
distance = 1050km
the fuel burns at a rate of 74.4 L/min
therefore the amount of fuel that the jet consumes on a 1050.km becomes;
total fuel used = time × fuel burning rate 
where time = distance / speed 
∴ total fuel used (consumed) = time × fuel burning rate 
total fuel consumed = (1050km × 1hr/1900km) × (60min/ 1hr × 74.4L/1min)
total fuel consumed = 2466.95L
 
 
        
             
        
        
        
Answer:
The red arrow from igneous to sedimentary rock
Explanation:
When rocks are weathered and eroded, they become sediment. This sediment is later compacted and cemented to form sedimentary rock. Therefore, the red arrow going from igneous rock to sedimentary rock represents weathering and erosion.
 
        
             
        
        
        
Answer:
Volume of the solutions
This is the most important factor for her to control.
 
        
             
        
        
        
Answer:
C: Sodium
Explanation:
Iron had a way higher density neon has way to know as well as carbon and the closest one is sodium