You can identify a metal by carefully determining its density. A 29.51 g sample of an unknown metal is 1.50 cm long, 2.50 cm wide, and 1.00 cm thick. What is a possible identity of the element?

1 Answer
Jan 15, 2018



#rho_"unknown metal"=(29.51*g)/(1.50*cmxx2.50*cmxx1.00*cm)#

#=7.90*g*cm^-3# could look up a list detailing the densities of metals and alloys, and search for a likely candidate. Iron, #rho=7.87*g*cm^-3#, fits the bill. Of course, no one would know the densities of common metals off the top of their heads.