Which of the following has the highest mass
1.4.5X1023 atoms of Mg
2. 0.4 g atoms Fe
3. 1.25 g mol NH3
4. .0.5 g equivalent Na2CO3
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1) mg
mg mass is 24.305
fe mass is 55.845
Nh3 mass is 17.031
na2co3 mass is 105.98
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