Epsom salt is MgSO4.
We assume x water of hydration in the crystalline form.
Molecular mass of MgSO4 = 24+32+4*16=120
Molecular mass of MgSO4.xH2O = 120+18x
By proportion,
2.000/0.977 = (120+18x)/120
Cross multiply
0.977(120+18x) = 120*2.000
from which we solve for x
17.586x+117.24 = 240
x=122.78/17.586
=6.980
Answer: there are 7 water of hydration in Epsom salt, according to the experiment.
Note: more accurate (proper) results may be obtained by using exact values (3-4 significant figures) in the molecular masses. However, since water of hydration is the nearest integer, using approximate values (to at least two significant figures) suffice.
Your answer would be Quarts .
<u>Answer:</u> The change in internal energy of the gas is 29.414 kJ.
<u>Explanation:</u>
To calculate the temperature of the gas at different volumes, we use ideal gas equation:
- When volume =
We are given:
Conversion used: 
Putting values in above equation:
- When volume =
We are given:
Putting values in above equation:
- To calculate the change in internal energy, we use the equation:
where,
= change in internal energy = ?
n = number of moles = 4.0 mol
= heat capacity at constant volume = 
= final temperature = 1095.06 K
= initial temperature = 505.41 K
Putting values in above equation, we get:
Converting this value in kilojoules, we use the conversion factor:
1 kJ = 1000 J
So, 
Hence, the change in internal energy of the gas is 29.414 kJ.
Answer:
The empirical formulae for the car fuel is C4H9
Salutations!
What is Chromatography?
Chromatography is used to separate mixtures of coloured and non- coloured substances.
Hope I helped.
