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kati45
1 month ago
7

Lysine is an amino acid that is an essential part of nutrition but which is not synthesized by the human body. What is the molar

mass of lysine if 750.0 mL of a solution containing 8.60 g of lysine has an osmotic pressure of 1.918 atm? Temperature = 25.0°C
Chemistry
2 answers:
VMariaS [2.9K]1 month ago
6 0

Answer:

The molar mass of lysine is calculated to be 146.267 grams per mole.

Explanation:

The formula for osmotic pressure (π) is given as

π = cRT

where c represents the molarity. \frac{moles}{L}c denotes the number of moles per liter of solution.

R is the universal gas constant, equal to 0.0821

and T is temperature in Kelvin. \frac{L-atm}{mole-K}

Plugging in the values into the equation gives

1.918 =

M = 146.267 grams per mole.\frac{8.6\times1000}{M\times750}\times0.0821\times298

castortr0y [3K]1 month ago
4 0

Answer:

For this situation, the molar mass of lysine calculated with the ideal gas equation is 146.25 g/mole.

Explanation:

The ideal gas formula PV = nRT originates from Avogadro's, Boyle's, and Charles's laws. We need to solve for the number of moles n.

The variables in this equation are:

P = 1.918 atm

V = 750.0 mL = 0.75 L

n =?

R = 0.0821

T = 25 degrees Celsius = 25 + 273 = 298 Kelvin.

By using this formula, we find n = (PV)/(RT)

n = (1.918 X 0.75)/(0.0821 X 298 )

n = 0.0588

n, number of moles = mass/molar mass

0.0588 = 8.6/MM

MM = 8.6/0.0588

MM = 146.25 g/mole.

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