1.

Calculate the number of iron atoms in a piece of iron weighing 2.8 g.(Atomic mass of iron\[=56\])

A.  \[30.11\times {{10}^{23}}\]atoms
B.  \[3.11\times {{10}^{23}}\]atoms
C.  \[3.0115\times {{10}^{22}}\]atoms  
D.  \[301.1\times {{10}^{23}}\]atoms
Answer» D.  \[301.1\times {{10}^{23}}\]atoms


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