What is the purpose of the catalyst?
a. to start the chemical reaction
b. to stop the chemical reaction
c. to speed up the chemical reaction
d. to make the chemical reaction safe to observe
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Ответ:
Ответ:
2.5 mcg of iron
Explanation:
Density is given as;
D= m/v
Where;
m= mass
v= volume
mass= ?
volume= 6.5 ml or 0.065 dl
d= 39 mcg/dL
m= density × volume
m= 39 mcg/dL × 0.065 dl
m= 2.5 mcg of iron