Answer:
16 mol
Explanation:
3Cl2 (g) + 8NH3 (g) → N2 (g) + 6NH4Cl (s)
from reaction 8 mol 6 mol
given x mol 12 mol
8 : x = 6 :12
6x = 12*8
x = 12*8/6 =16 mol
Atomic number of gold,
= 79 means there are 79 electrons in per atom of gold.
Atomic mass of gold = 196.967 gm
0.990 oz of gold is given.
Now, converting 

So, 
Now, for determining the number of moles, the formula for number of moles is:

Substituting the values:

1 mole of 
So, for 0.1425 mole of 
Since 1 atom of gold has 79 electrons so,
Number of electrons = 
So, number of electrons in 0.990 oz of pure gold coin is
.
Explanation:
KOH + 2H2SO4 ======> 2K2SO4 + H20

Potassium Does! Hope that helps
Answer: C. The number of collisions of gas particles decreases
Explanation: As temperature decreases so does everything else same with increase.