How many moles are in 1.02 x 10^23 atoms of argon gas

0.17 mol

Explanation:

Given data:

Number of atoms of Ar gas = 1.02×10²³ atom

Number of moles = ?

Solution:

The given problem will solve by using Avogadro number.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

1.02×10²³ atom × 1 mol / 6.022 × 10²³ atoms

0.17 mol

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

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the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l