Physical is something you can feel chemical is like a gas
Answer:
Both oxygen atoms have zero partial charge.
Explanation:
In covalent bonds, electrons are shared between the two bonding atoms. The shared electron pair of the covalent bond is positioned between the nuclei of the two bonding atoms.
A covalent bond may be formed between two or more elements of different electronegativities. When a difference in electro negativity exists between these atoms in a covalent bond, the molecule becomes polarized. The shared electron pair of the covalent bond becomes closer to the nucleus of the more electronegative atom (s). This more electronegative atom (s) becomes partially negative while the other atom becomes partially positive.
When the two bonding atoms are of equal electronegativities such that the electro negativity difference between the bonding atoms is zero, there is now no difference in electro negativity and no consequent partial charges.
Since the two oxygen atoms have the same electro negativity, there is no difference in electronegativity, hence there is no partial charge between the two oxygen atoms.
Answer: conducts electricity and heat efficiently, resists melting at high temperatures.
Explanation: Ionic compounds are formed by transference of electrons and leads to generation of cations and anions which are held by strong coloumbic forces. eg: NaCl
Ionic compounds when dissolved in water dissociates into ions and thus are good conductors of heat and electricity.
They are conductors not insulators.
They have very high melting points as they are held by strong coloumbic forces.
They dissociate into ions when dissolved in water.
Answer:
a) 0.1783 mol
b) 1.07*10^23 atoms
Explanation:
Step 1: Data given
Mass of gold (Au) = 35.12 grams
Molar mass of gold (Au) = 196.97 g/mol
Number of Avogadro = 6.022 *10^23 /mol
Step 2: Calculate number of moles gold
Number of moles = Mass of gold / molar mass of golf
Number of moles = 35.12 grams / 196.97 g/mol
Number of moles = 0.1783 moles
Step 3: Calculate number of atoms of gold
Number of atoms = number of moles * Number of Avogadro
Number of atoms = 0.1783 * 6.022 *10^23/ mol
Number of atoms = 1.07*10^23 atoms
