Fe2O3 + 3CO --------> 2Fe + CO2
1 : 3 : 2 : 3
13.3 <--- 40 ------> 26.6 ---> 40 ( mol)
n = m/M
m CO2 = n.M = 13.3 . 40 = 532 ( g)
p/s : i hope that this will help ( cause i'm not really good at english :}}} )
They're not important when solving math problems in class because you need to get the correct and accurate answers hence don't need to change them into significant figures
The correct answer I believe is sunlight
Answer:
Cu+2AgNO3--->2Ag+Cu(NO3)2
Explanation:
Exothermic reaction releases energy in the form of heat or light
