The osmotic pressure of a solution containing 5.87 mg of an unkonw protein per 10 ml of solution is 2.45 torr at 25 degree clesius. Find the molar mass of the unknown protein. 1 atm

14.35g/mol

Explanation:

Using the osmotic pressure formula we can calculate the concentration of the unknown protein solution as follows:

Π = iMRT

Π = 2.45 torr

Recall:

760torr = 1atm

2.45torr = 2.45/760 = 0.00322atm

i = 1

R = 0.082atm.L/K /mol

T = 25°C = 25 + 273 = 298K

M =?

M = Π / iRT

M = 0.00322 / (1 x 0.082 x 298)

M = 1.318x10^-4M

Using the ideal gas equation (PV = nRT), let us find the number of mole as follows:

V = 10mL = 10/1000 = 0.01L

P = 1atm

T = 25°C = 25 + 273 = 298K

R = 0.082atm.L/K /mol

n =?

PV = nRT

n = PV /RT

n = (1 x 0.01) / (0.082 x 298)

n = 4.09x10^-4mol

Now, we can find the molar mass of the unknown protein as follows:

Mass of unknown protein = 5.87 mg = 5.87x10^-3g

Number of mole of unknown protein = 4.09x10^-4mol

Molar Mass of unknown protein =?

Number of mole = Mass /Molar Mass

Molar Mass = Mass / number of mole of

Molar Mass of unknown protein = 5.87x10^-3/4.09x10^-4 = 14.35g/mol

The molar mass of the protein is 4453.7 g/mol

Explanation:

Step 1: data given

Mass of the unknown protein = 5.87 mg = 0.00587 grams

volume = 10 mL

Osmotic pressure = 2.45 torr

Temperature = 25.0 °C

Step 2 = Calculate concentration

π = i*M*R*T

⇒ π = the osmotic pressure = 2.45 torr = 2.45 / 760 atm = 0.003223684 atm

⇒ i = the van't Hoff factor = 1

⇒ M = the concentration =

⇒ R = the gas constant = 0.08206 L*atm/mol*K

⇒T = the temperature = 25.0 °C = 298 K

0.003223684 = 1 * M *0.08206 * 298

M = 0.0001318 M

Step 3: Calculate moles

Moles = molarity *volume

Moles = 0.0001318 M * 0.01 L

Moles = 0.000001318 moles

Step 4: Calculate molar mass

Molar mass = mass / moles

Molar mass = 0.00587 grams / 0.000001318 moles

Molar mass = 4453.7 g/mol

The molar mass of the protein is 4453.7 g/mol

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.