By studying and learning by using your brain to accomplish new goals. :)
(if that makes sense)
Hope this helps :3
        
             
        
        
        
Yes, because CO2 is carbon dioxide, and carbon dioxide contains molecules.
        
             
        
        
        
Answer:
18.9 moles of MgCl2 = 17.834 kg of MgCl2
Explanation:
The molecular weight of MgCl is 80.0 g/mol . So, to convert the given mole amount to grams, multiply this by this number, which is constant for all compounds with a specific composition (mass fraction).
Considering the original question was in the context of chemistry, I wanted to make it seem formal and more educational too. Hopefully that worked!  
EDIT: Came up with some text around what happens inside cells that would have made it better if someone just had an issue converting units, but I doubt my answer will be accepted >.< 
 
        
             
        
        
        
3*40+3*2*35.5=333* Avogadro’s number = 
1.98*10^25
        
             
        
        
        
Answer:
a state of matter created when particles, called bosons, are cooled to near absolute zero (-273.15 degrees Celsius, or -460 degrees Fahrenheit).
Explanation:
hope this helps
pls mark brainliest