two reasons why cryolite is used in the electrolysis of aluminium oxide. The mixture of cryolite and aluminium oxide has a lower melting point than pure aluminium oxide. This means a lower amount of energy is required to establish effective conditions for electrolysis and thus makes it more cost effective.
Give two reasons why cryolite is used in the electrolysis of ...https://www.mytutor.co.uk › answers › GCSE › Chemistry
The answer would be 2.047 x <span>10^23 atoms of copper </span>
Answer:In
1
m
o
l
of
C
a
atoms
, there are
N
A
individual calcium atoms.
Explanation:
How does this help you? Well, it happens that
N
A
,
Avogadro's Number
≅
6.022
×
10
23
⋅
m
o
l
−
1
.
And it is stated on your trusty Periodic Table that the molar mass of
C
a
is
40.08
⋅
g
⋅
m
o
l
−
1
. So, if we specify a molar quantity, we specify a precise number of atoms and molecules that can be approximated by mass.
Explanation:
Because the cats all have full bowls in the morning and afternoon, Katy can assume that the cats do not eat in the morning or afternoon. The bowls are replenished in the evening, which suggests that they become empty in the evening, which suggests that the pattern is that the cats eat in the evening.