Answer:
0.87 moles
Explanation:
Given data:
Number of moles of magnesium = ?
Number of atoms of magnesium = 5.23 × 10²³ 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.
For example,
one mole = 6.022 × 10²³ atoms
5.23 × 10²³ atoms × 1 mol / 6.022 × 10²³ atoms
0.87 moles
The inner core has the greatest pressure.
Answer:
gallium (Ga)
Explanation:
the elements which have fewer than four dots in the electron dot diagrams. Explanation: Electron dot diagrams are the diagrams which represent the valence electrons in an element. The electrons are represented by the dots in these diagrams.
The answer is D. To put it simply, all atom wished to become stable. The only way for that is to obtain an octet structure where the outermost shell would have 8 electrons, thus being full.
