Why is some amount of cryolite added in the electrolysis of molten alumina
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Answer : The mass of at temperature
28.47 g.
The mass of at temperature
29.51 g.
Solution : Given,
Pressure of gas = 1.35 atm
Temperature of gas =
Volume of gas =
Molar mass of = 65 g/mole
Part 1 : First we have to calculate the moles of gas at temperature . The gas produced in the given reaction is
.
Using ideal gas equation,
where,
P = pressure of the gas
V = volume of the gas
T = temperature of the gas
n = number of moles of gas
R = Gas constant = 0.0821 Latm/moleK
Now put all the given values in this formula, we get
By rearranging the terms, we get the value of 'n'
The moles of = 0.7015 moles
The given balanced reaction is,
As, 32 moles of produced from 20 moles of
So, 0.7015 moles of produced from
moles of
Now we have to calculate the mass of .
Therefore, the mass of needed are 28.47 g.
Part 2 : We have to calculate the moles of gas at temperature and same volume & pressure.
Using ideal gas equation,
Now put all the given values in this formula, we get
By rearranging the terms, we get the value of 'n'
The moles of = 0.726 moles
The given balanced reaction is,
As, 32 moles of produced from 20 moles of
So, 0.726 moles of produced from
moles of
Now we have to calculate the mass of .
Therefore, the mass of needed are 29.51 g.
<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2>
ATOMIC NUMBER: It is the number of protons present in the nucleus of every atom
MASS NUMBER: It is the number of nucleon. Nucleon are the number of proton and neutrons present in the nucleus.
PROTON NUMBER: Proton number equal to the atomic number.
ELECTRON NUMBER: Electron Number is equal to the atomic number.
NEUTRON NUMBER: It is Mass Number - Atomic Number.
CHARGE: It is due to the addition or removal of the electron. + charge when electron removed and - charge when electron is added.
SYMBOL: It is represented as,
Z is Mass Number
A is Atomic Number
<h2>_____________________________________</h2><h2>Worksheet:</h2>(I) ATOMIC NUMBER: 17
MASS NUMBER: 35.5
PROTON NUMBER: 17
ELECTRON NUMBER: 17
NEUTRON NUMBER: 18.5
CHARGE: 0
<h2>_____________________________________</h2>(II) ATOMIC NUMBER: 71
MASS NUMBER: 180
PROTON NUMBER: 71
ELECTRON NUMBER: 71
NEUTRON NUMBER: 109
CHARGE: 0
<h2>_____________________________________</h2>(III) ATOMIC NUMBER: 40
MASS NUMBER: 86
PROTON NUMBER: 40
ELECTRON NUMBER: 38
NEUTRON NUMBER: 46
CHARGE: +2
<h2>_____________________________________</h2>(IV) ATOMIC NUMBER: 92
MASS NUMBER: 238
PROTON NUMBER: 92
ELECTRON NUMBER: 86
NEUTRON NUMBER: 146
CHARGE: +6
<h2>_____________________________________</h2>(V) ATOMIC NUMBER: 82
MASS NUMBER: 206
PROTON NUMBER: 82
ELECTRON NUMBER: 78
NEUTRON NUMBER: 124
CHARGE: +4
<h2>_____________________________________</h2>(VI) ATOMIC NUMBER: 34
MASS NUMBER: 79
PROTON NUMBER: 34
ELECTRON NUMBER: 36
NEUTRON NUMBER: 45
CHARGE: -2
<h2>_____________________________________</h2>(VII) ATOMIC NUMBER: 48
MASS NUMBER: 113
PROTON NUMBER: 48
ELECTRON NUMBER: 49
NEUTRON NUMBER: 65
CHARGE: -1
<h2>_____________________________________</h2>(VIII) ATOMIC NUMBER: 21
MASS NUMBER: 42
PROTON NUMBER: 21
ELECTRON NUMBER: 21
NEUTRON NUMBER: 21
CHARGE: 0
<h2>_____________________________________</h2>(IX) ATOMIC NUMBER:
MASS NUMBER:
PROTON NUMBER:
ELECTRON NUMBER:
NEUTRON NUMBER:
CHARGE:
<h2>_____________________________________</h2>(X) ATOMIC NUMBER: 83
MASS NUMBER: 209
PROTON NUMBER: 83
ELECTRON NUMBER: 80
NEUTRON NUMBER: 126
CHARGE: +3
<h2>_____________________________________</h2>(XI) ATOMIC NUMBER: 47
MASS NUMBER: 108
PROTON NUMBER: 47
ELECTRON NUMBER: 47
NEUTRON NUMBER: 61
CHARGE: 0
<h2>_____________________________________</h2>(XII) ATOMIC NUMBER: 49
MASS NUMBER: 116
PROTON NUMBER: 49
ELECTRON NUMBER: 46
NEUTRON NUMBER: 67
CHARGE: +3
<h2>_____________________________________</h2>(XIII) ATOMIC NUMBER: 53
MASS NUMBER: 128
PROTON NUMBER: 53
ELECTRON NUMBER: 54
NEUTRON NUMBER: 75
CHARGE: -1
<h2>_____________________________________</h2>(XIV) ATOMIC NUMBER: 76
MASS NUMBER: 188
PROTON NUMBER: 76
ELECTRON NUMBER: 72
NEUTRON NUMBER: 112
CHARGE: +4
<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />