Answer: 0.77 mole
Explanation:
Atomic mass of Ca = 40g/mol
Atomic mass of O = 16g/mol
Atomic mass of H = 1
Therefore,
1 mole of Ca(OH)_2 contains
40+[16+1]2
= 40+34
=74g/mole
Hence,
1 mole of Ca(OH)_2 = 74g
Let x mole of Ca(OH)_2 = 56. 78
x = 56.78/74
x = 0.77 mole
Explanation:
It is known that relation between wavelength and frequency is as follows.

where,
= wavelength
c = speed of light = 
[/tex]\nu[/tex] = frequency
It is given that frequency is
. Hence, putting this value into the above formula and calculate the wavelength as follows.


= 
or, = 
Thus, we can conclude that wavelength of given radiation is
.
Answer:
H2SO4 ( Sulfuric Acid ) + NaOH ( Sodium Hydroxide ) > Na2SO4 ( Sodium Sulfate ) + H2O ( Water )
Explanation: