In the box below draw the tetrahedral representation of the s enantiomer of the amino acid valine, ch3ch(ch3)ch(nh2)co2h.
1 answer:
The S-Enantiomer of Valine is attached below.
Assigning S-Configuration:
In Valine there is only one <em>chiral carbon</em> (carbon to which all bonded atoms or group of atoms attached have different masses). This carbon also known as <em>alpha carbon</em> has a tetrahedral geometry. For S-configuration, according to<em> Cahn Ingold Prelog Rules</em> the -NH₂ group is assigned with priority order of 1, The carbon of carboxylic acid is assigned the number two and the tertiary carbon is assigned with number three. These three groups are made in such a way that moving from number 1 to number 3 makes a S sign or anticlockwise rotation while keeping the hydrogen atom behind the plane.
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Answer:
Mole fraction of Nacl is 0.173
Explanation:
we know that
where,
P sol - the vapor pressure of the solution
χ solvent - the mole fraction of the solvent
P ∘ solvent - the vapor pressure of the pure solvent
This means that in order to be able to calculate the mole fraction of sodium chloride, you need to know what the vapor pressure of pure water is at
25 ° C You can use an online calculator to find that the vapor pressure of pure water at 25 C is equal to about 23.8 torr .
=0.827
Also we know that
This means that the mole fraction of sodium chloride is
χ_{Nacl}= 1-Χ_{water}
= 1-0.827 =0.173
Answer:
Explanation:
HCl and HNO₃ both dissociate completely in water. A simple method is to determine the number of moles of proton from both these acids and dividing it by the total volume of solution.
Here, n is the number of moles and V is the volume. From the given data moles can be calculated as follows
For molar concentration of hydrogen ions:
From dissociation of water (Kw = 1.01 X 10⁻¹⁴ at 25°C) [OH⁻] can be determined as follows
The pH of the solution can be measured by the following formula: