Find the number of atoms and find the number of moles of S in 16 grams of sulphur

Number of moles = 0.5 mol

3.011 ×10²³ atoms

Explanation:

Given data:

Mass of sulfur = 16 g

Number of moles = ?

Number of atoms = ?

Solution:

Number of moles of S:

Number of moles = mass/molar mass

Number of moles = 16 g/ 32 g/mol

Number of moles = 0.5 mol

Number of atoms:

1 mole contain 6.022×10²³ atoms

0.5 mol × 6.022×10²³ atoms / 1 mol

3.011 ×10²³ atoms

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