(1.024 × 10^29 atoms) / (6.02214 × 10^23 atoms/mol) = 170039 mol
(1.550 m^3) x (1000 L/m^3) x (1000 cm^3/L) x (21.40 g/cm^3) = 33170000 g
(33170000 g) / (170039 mol) = 195.07 g/mol
The metal with an atomic mass like that is Platinum (Pt).
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Answers & Comments
(1.024 × 10^29 atoms) / (6.02214 × 10^23 atoms/mol) = 170039 mol
(1.550 m^3) x (1000 L/m^3) x (1000 cm^3/L) x (21.40 g/cm^3) = 33170000 g
(33170000 g) / (170039 mol) = 195.07 g/mol
The metal with an atomic mass like that is Platinum (Pt).