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)

$\tt N=n\times No(No=Avogadro's)\\\\n=\dfrac{N}{No}\\\\n=\dfrac{5.3.10^{25}}{6.02.10^{23}}=88.04\approx=88~moles$