She needs to freeze the liquid change it’s physical state
Answer:
The vapor pressure of ethanol in the solution is 10,27 kPa
Explanation:
To obtain the vapor pressure of a solution it is necessary to use Raoult's law:
<em>(1)</em>
The moles of ethanol are:
18,00mL×
×
= 0,3083 mol Ethanol.
Moles of benzoic acid:
12,55 g×
= 0,1028 mol benzoic acid.
Thus, mole fraction of solvent, X, is:
=<em> 0,7499</em>
Replacing this value in (1):
= <em>10,27 kPa</em>
<em></em>
I hope it helps!
Carbon atom having 4 valence electrons can form 4 covalent Bonds. As there are 3 carbon atoms in the molecule connected to each other by single bond. So the terminal carbons are left with 3 unbonded electrons and the central carbon is left with two unbonded electrons. So, terminal carbons will further form three single bonds with 3 hydrogen atoms each and the central carbon will form two covalent bonds with 2 hydrogen atoms, i.e.
H₃C-CH₂-CH₃
Result:
This Molecule contains 8 Hydrogen atoms.
Answer:
Explanation: We all learn at school that pure water always boils at 100°C (212°F), under normal atmospheric pressure. ... And removing dissolved air from water can easily raise its boiling temperature by about 10 degrees centigrade.
This question is incomplete so because of unavailability of proper information i will simply let you understand this by an example:
<span>lets say you have 4.2 moles of methanol in 5.67 L.
</span>Firstly convert the moles into mass
<span>mass = moles x molar mass of methanol</span>
<span>mass = 4.2 moles x 32.05 g/mol = 134.61 g </span>
<span>Density = mass / vol </span>
convert 5.67L into mL which is 5670mL
putting values
<span>134.61 / 5670 mL = 0.0237 g/mL
</span>hope you get it!
