A sample contains 9.81 g Zn (atomic mass 65)

CHEMISTRY · Single correct · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

A sample contains 9.81 g Zn (atomic mass 65),

1.8 \times 10^{23}

atoms of Cr and 0.6 g-atoms of Cr. The simple formula of this compound is : (1)

{\text{ZnCrO}}_4

(2)

{\text{ZnCr}}_2{\text{O}}_4

(3)

{\text{Zn}}_2{\text{CrO}}_4

(4)

{\text{ZnCrO}}_3