Answer:
8.085x10²¹ atoms
Explanation:
Atomic mass of Fe = 55.845 g/mol
it means ,
1 mole Fe = 55.845 g
1 mole = 6.02x10²³ atoms
so,
55.845g Fe has = 6.02x10²³ atoms
∴0.750 g Fe has = {(6.02x10²³ x 0.750)/55.84} atoms
=8.085x10²¹ atoms
Answer:
Net ionic: 
Explanation:
in
reacts with
to form
and
.
Due to this acid-base reaction,
become soluble whenever
is added to suspension of
.
In this reaction,
acts as an acid and
acts as a base.
Molecular equation: 
Total ionic: 
Net ionic: 
Explanation:
The mass of bromine is 79.904, and since there are two of them in the Calcium Bromide molecule, we'll multiply it by 2 to get 159.808. Dividing that by the full mass of the molecule then multiply it by 100 will give you the answer.
Using the VSPER theory, the effect of lone pairs on molecular shape can be discussed.
There are 3 types of electron pairs present in a molecular shape: bond pair -bond pair, lone pair - bond pair, lone pair - lone pair.
Strength of repulsions between these three types of pair follows the order:
lone pair- lone pair > lone pair - bond pair > bond pair - bond pair
Whenever there is an addition of lone pairs to the geometry, some distortions take place which decreases the bond angles and some asymmetry is attained in the original molecular shape.