Concentration of solution is 20%
Mass of solute( common salt) is 80g
take the amount of water as x
mass of the solvent = (80+x)
We know, concentration of solution = (mass of solute/mass of solution)×100
20=(80/80+x)×100
80+x=80×5 ( we devide the both side by 20)
x= 400-80
x=320 g
Answer:
N₂H₆
Explanation:
A 1.000 g sample of nitrogen combined with a 0.0720 g sample of hydrogen to form N₂H₂ .
1.000 g of nitrogen combines with 0.2160 g of hydrogen in the next compound .
In this compound the component of nitrogen remains the same but the component of hydrogen becomes .2160 / .0720 = 3 times .
Hence component of hydrogen in the new compound will change from
H2 to H6 .
Hence the chemical formula of new compound will be
N₂H₆ .
The value for ΔG = 18 kJ/mol
<h3>Further explanation</h3>
Given
ΔH = 27 kJ/mol and ΔS = 0.09 kJ/mol.K
T = 100 K
Required
the value for ΔG
Solution
The spontaneous process of a reaction is based on 2 factors :
- enthalpy change ΔH decreases and
- entropy change ΔS increases
ΔG=ΔH-T.ΔS
For a neutralisation reaction...
Acid + base 》 salt + water....
The above reaction looks much alike so is a neutralisation...
It is certainly not compustion as no oxygen to react and CO2 produced
Potential energy, kinetic energy would be if they were already running