answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
TEA [102]
2 years 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:
gogolik [260]2 years ago
6 0

Answer:

Molar mass of lysine is 146.267 grams per mole.

Explanation:

Osmotic pressure(π) is given by the formula

π = cRT

where c is concentration in \frac{moles}{L} (Molarity).

c = no of moles per volume in litres.

R is universal gas constant = 0.0821 \frac{L-atm}{mole-K}

T is temperature in K.

Substituting values in the above equation gives

1.918 = \frac{8.6\times1000}{M\times750}\times0.0821\times298

M = 146.267 grams per mole.

nata0808 [166]2 years ago
4 0

Answer:

The molar mass of lysine using the ideal gas equation for this problem is 146.25 g/mole.

Explanation:

The ideal gas equation PV = nRT, was derived from the ABC laws (Avogadros, Boyles and Charles laws). We need to obtain the value for the number of moles n.

The parameters of this equation are:

P = 1.918 atm

V = 750.0mL = 0.75L

n = ?

R = 0.0821

T = 25 degree celcius = 25 + 273 = 298 degree kelvin.

From this formular, n = (PV)/(RT)

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

n = 0.0588

n, no of mole = mass/molar mass

0.0588 = 8.6/MM

MM = 8.6/0.0588

MM = 146.25g/mole.

You might be interested in
Calculate the molar mass of a gas that diffuses three times faster than oxygen under similar conditions.
JulsSmile [24]
<span> rate 3/1= square root of 32/x
square both sides
9/1=32x
x = 32/9
= 3.6
Must be He
molar mass =4
</span>
7 0
2 years ago
Read 2 more answers
Titration reveals that 11.6 mL of 3.0M sulfuric acid are required to neutralize the sodium hydroxide in 25.00mL of NaOH solution
Deffense [45]

Answer:

Explanation:

Molarity of acid(volume of acid)(# of H ions)= molarity of base(volume of base)(# of OH ions)

M(v)(#)=M(v)(#)

sulfuric acid    sodium hydroxide

H2SO4           NaOH

(3)(11.6)(2)=M(25)(1)

M=2.784

6 0
2 years ago
A student is given a sample of CuSO4(s) that contains a solid impurity that is soluble and colorless. The student wants to deter
DochEvi [55]

Answer:

The impurity which is present in the solution of copper sulphate (CuSO4) is determined by the an instrument known as spectrophotometer.

Explanation:

Spectrophotometer is a device or an instrument which is used to determine the concentration of a chemical by measuring the detection of light intensity that is coming from the solution. If the solution of copper sulphate is checked through spectrophotometer, we can can determined or measure the amount of copper sulphate and the impurity in the solution.

3 0
2 years ago
Which of the following pairs of compounds would be most easily separated by thin layer chromatography: n-octyl alcohol and 1-oct
vivado [14]

Answer:

B. n-octyl alcohol and 1-octene

Explanation:

Thin-layer chromatography (TLC) is a chromatography technique used to separate non-volatile mixtures. The principle is that different compounds in the sample mixture travel at different rates due to the differences in interactions with stationary phase and due to the differences in solubility in the solvent. The principal chemical property for separation using this technique is molecular polarity

You can intuit than hexadecane and octadecane don't have big polarity differences, also chlorobenzene and bromobenzene haven't.

An alcohol as n-octyl alcohol has different polarity than an alkene as 1-octene.

Thus, using  thin layer chromatography is most easy to separate:

<em>B. n-octyl alcohol and 1-octene </em>

<em></em>

I hope it helps!

<em></em>

8 0
2 years ago
Two substances in a mixture differ in density and particle size. These properties can be used to
lianna [129]

Answer:

(1) separate the substances

(2) chemically combine the substances

(3) determine the freezing point of the mixture

(4) predict the electrical conductivity of the mixture

Explanation:

3 0
2 years ago
Other questions:
  • How many grams of o2 are required to produce 358.5 grams of zno??
    10·2 answers
  • Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:
    11·2 answers
  • A sample of a certain material has a mass of 2.03 × 10–3 g. Calculate the volume of the sample, given that the density is 9.133
    12·2 answers
  • Part a write an equation for the formation of nh3(g) from its elements in its standard states. express your answer as a chemical
    11·2 answers
  • The solubility of acetanilide is 12.8 g in 100 mL of ethanol at 0 ∘C, and 46.4 g in 100 mL of ethanol at 60 ∘C. What is the maxi
    8·1 answer
  • The noble gases are inert. This means they a. exist as gases at room temperature. b. undergo many chemical reactions. c. lose an
    14·1 answer
  • Gasoline has a density of 0.749 g/mL. There are 454 grams in a pound and 3.7854 litres in a gallon. How many pounds does 19.2 ga
    15·1 answer
  • 1g of a white solid is placed into a beaker of a green-colored liquid. The color of the liquid does not change, but a gas begins
    11·1 answer
  • In the first step of glycolysis, the given two reactions are coupled. reaction 1:reaction 2:glucose+Pi⟶glucose-6-phosphate+H2OAT
    11·1 answer
  • an unknown metal of mass 512 g at a temperature of 15C is dropped into 325 g of water held in a 100 g aluminum container at the
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!