First of all write a balanced equation.
4Na + O2 -> 2Na2O
You are starting with a mass of sodium. You need to use sodium’s molar mass. Take this quantity times mole to mole ratio between sodium and sodium oxide to get moles of sodium oxide produced.
.141 moles of sodium oxide produced
Answer :
Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule. The electrons are represented by dot.
The given molecule is, perbromate ion.
Bromine has '7' valence electrons and oxygen has '6' valence electron.
Therefore, the total number of valence electrons in perbromate ion,
= 7 + 4(6) + 1 = 32
According to Lewis-dot structure, there are 14 number of bonding electrons and 18 number of non-bonding electrons.
Formula for formal charge :

The Lewis-dot structure of perbromate ion is shown below.
CO HAS A HIGHER BOILING POINT BECAUSE THE INTEMOLECULAR FORCES ARE STRONGER THEN N2 WHICH IS NON POLAR. CO HAS A HIGHE BOILING POINT BECAUSE THE INTEMOLECULAR FORCES ARE STRONGER THEN N2 WHICH IS NON POLAR
Answer:
Ionic bond occurs between two atoms that have different:
a) Electron
Explanation:
according to the definition of ionic bond,
it is the electrostatic force of attraction that holds the two oppositely charged ions together and an ionic bond or electrovalent bond is formed when one atom gains electrons while the other atom loses electrons from its outermost level or orbit.