Answer:
1) 1.51 × 10²³ particles of Mg
2) 0.54 × 10⁻³ moles
Step-by-step explanation:
Given data:
1)
Number of moles of Mg = 0.250 mol
Number of representative particles = ?
Solution:
The given problem will solve by using 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.
The number 6.022 × 10²³ is called Avogadro number.
1 mol = 6.022 × 10²³ particles
0.250 mol × 6.022 × 10²³ particles / 1 mol
1.51 × 10²³ particles of Mg
2)
Given data:
Number of moles of lead = ?
Number of atoms of lead = 3.25×10²⁰ atoms
Solution:
The given problem will solve by using 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.
The number 6.022 × 10²³ is called Avogadro number.
1 mol = 6.022 × 10²³ atoms of Pb
1 mol × 3.25×10²⁰ atoms of Pb / 6.022 × 10²³ atoms of Pb
0.54 × 10⁻³ moles