D because the 2 substances are made up using colloids
        
                    
             
        
        
        
Answer: Jose is correct because air is a mixture of gases ( both elements and compounds).
Explanation:
An element consist of only one type of atom and a compound made up of 2 or more types of elements joined together ( by ionic or covalent bonds). 
Whereas air around us is a mixture of gases (both elements and compounds) like nitrogen, oxygen, argon, and carbon dioxide, and very small amounts of other gases and water vapors
Hence, Jose is correct because air is a mixture of gases ( both elements and compounds).
 
        
             
        
        
        
Answer:
5.85 moles of carbon dioxide are created.
Explanation:
The balanced reaction is:
CaCO₃ → CaO + CO₂
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
- CaCO₃: 1 mole 
- CaO: 1 mole
- CO₂: 1 mole
Then you can apply the following rule of three: if by stoichiometry 1 mole of CaCO₃ produces 1 mole of CO₂, 5.85 moles of CaCO₃ will produce how many moles of CO₂?

moles of CO₂= 5.85
<u><em>5.85 moles of carbon dioxide are created.</em></u>
 
        
             
        
        
        
<span>longitudinal waves is the answer hope this helps</span>