The molar mass of the unknown compound is calculated as follows
let the unknown gas be represented by letter Y
Rate of C2F4/ rate of Y = sqrt of molar mass of gas Y/ molar mass of C2F4
= (4.6 x10^-6/ 5.8 x10^-6) = sqrt of Y/ 100
remove the square root sign by squaring in both side
(4.6 x 10^-6 / 5.8 x10^-6)^2 = Y/100
= 0.629 =Y/100
multiply both side by 100
Y= 62.9 is the molar mass of unknown gas
The answer is C. Fluctuating.
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Answer : The missing part is,
Explanation :
Nuclear fission : It is a process in which a heavy nuclei absorbs a neutron, they split or fission into two small nuclei and 3 neutrons.
Atomic number of Cf = 98
Atomic mass of Cf = 252
Atomic number of Te = 52
Atomic mass of Cf = 136
Atomic number of unknown element = [(252 + 1) - (136 + 3)] = 114
Atomic mass of unknown element = 98 - 52 = 46
So, the unknown element is, palladium (Pd)
The complete nuclear fission of a californium atom will be,
Hence, the missing part is,
2Al + 3CuCl2 ------> 3Cu + 2AlCl3
from reaction 2 mol 3 mol
given 0.357 mol x mol
x= 0.375*3/2 = 0.563 mol CuCl2
Balanced chemical reaction: Fe₂O₃<span> + 2Al → 2Fe + Al</span>₂O₃.
Fe₂O₃ is iron(III) oxide.
Al is aluminium.
Fe is iron.
Al₂O₃ is aluminium oxide.
In thermite reaction<span> elemental aluminium reduces the iron (III) oxide or some other metal oxide.
Mole ratios from chemical reaction:
n(</span>Fe₂O₃) : n(Al₂O₃) = 1 : 1.
n(Fe₂O₃) : n(Al) = 1 : 2.
n(Fe₂O₃) : n(Fe) = 1 : 2.