Answer:
mass=279grams
Step-by-step explanation:
GIVEN DATA
number of atoms=3.01×10^23
avogadro's number=6.022×10^22
molar mass of iron=56g/moles
TO FIND
mass in gram of iron=?
SOLUTION
by using the formula
mass in gram=(number of atoms÷avogdro's number)×molar mass
mass=(3.01×10^23÷6.022×10^23)×56
mass=0.499×56
mass=27.9grams=28 grams