Question

2. How many moles of scandium atoms are in 5.3 x 1025 atoms of scandium?

88 moles
880 moles
0.0113 moles
0.000113 moles

Answer 1

Number of moles of Scandium atoms=88

Further explanation

Given

5.3 x 10²⁵ atoms of scandium

Required

number of moles

Solution

1 mol = 6.02 x 10²³ particles(molecules, atoms, ions)

`\tt N=n* No(No=Avogadro's)\\\\n=(N)/(No)\\\\n=(5.3.10^(25))/(6.02.10^(23))=88.04\approx=88~moles`