1answer.
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
mamaluj [8]
3 years ago
9

Catalase (a liver enzyme) dissolves in water. A 14mL solution containing 0.166g of catalase exhibits an osmotic pressure of 1.2

Torr at 20°C. What is the molar mass of catalase?
Chemistry
1 answer:
nignag [31]3 years ago
7 0

Answer:

The correct answer is 180,424 g/mol

Explanation:

The expression for osmotic pressure (π) is the following:

π= i x M x R x T

Where M is the molarity of the solution, R is the gas constant and T is the temperature.

i= 1 because the catalase is a nonelectrolyte.

M= m/(VxMW) because the molarity is in mol/L and mol is obtained by the mass (m) divided into the molecular weight (MW)

We introduce this expression in the expression for osmotic pressure and we obtain:

π= \frac{m  R  T }{V  MW}

T= 20ºc= 293 K

V= 14 mL= 0.014 L

So, we directly calculate the molecular weight as follows:

MW= \frac{m  R T}{V   \pi }

MW= (0.166 g)(0.082 LatmK⁻¹mol)(293 K) (760Torr atm⁻¹)/(0.014 L)(1.2 Torr)

MW= 180,424 g/mol

For an enzyme: 180,424 g/mol= 180.4 kDa (because 1 g/mol= 1 Da)

You might be interested in
How many atoms of oxygen are in 5Li2SO4
olga55 [171]

Answer:

20 oxygen atoms

Explanation:

Li2SO4 has 4 oxygen atoms, so if there are 5 of that compound then there will be 20 oxygen atoms.

8 0
3 years ago
What does a cell do to a substance in Endocytosis
8090 [49]
Endocytosis is a type of bulk transport which involves the movement of large particles through the membrane in and out
3 0
4 years ago
Identify the element symbol<br> 1s22s22p63s23p64s23d104p65s24d5
madam [21]

Answer:

Tc

Explanation:

You just have to follow the rows with the exponents. Just remember that when we get to d, the number in the front is a period lower. Hope this helps!

5 0
1 year ago
Which changes increase the rate of reaction between calcium
Illusion [34]

Answer:

1. Increasing the concentration of the acid

2. Increasing the temperature

Explanation:

CaCO₃ + 2HCl ⟶ CaCl₂ + H₂O + CO₂

Increasing the concentration of the acid increases the number of hydronium ions in contact with the surface of the CaCO₃ per unit time.

Increasing the temperature increases the kinetic energy of the hydronium ions, so they hit the surface of the CaCO₃ mor frequently and with greater force.

3. is wrong. The bigger the pieces, the smaller the surface area that is available for reaction.

7 0
3 years ago
Name at least three physical properties of the bowling ball?
Contact [7]

Answer:

A bowling ball is a ball that is used in the game of bowling, where you roll the ball down an aisle and try to knock down as many pins as you can.

7 0
4 years ago
Other questions:
  • What potential difference is required to bring the proton to rest?
    12·1 answer
  • Which sequence is an example of radioactive decay?
    15·1 answer
  • What is made when acid reacts with carbonates and metals
    10·1 answer
  • When do exceptions to the octet rule occur
    15·1 answer
  • 24 what is the correct name for the compound cocl?
    15·2 answers
  • The distinctive symbol used to identify radioactive materials is the:
    9·1 answer
  • How many moles of hydrogen gas are needed to produce 20 grams of hydrochloric acid (HCl)?
    5·1 answer
  • What volume of 1.50 mol/L stock solution is needed to make 125 mL of 0.60 mol/L solution?
    12·1 answer
  • Which characteristic applies to all mixtures, including solutions?
    12·1 answer
  • If you start with 0.30 m mn2 , at what ph will the free mn2 concentration be equal to 4.6 x 10-11 m?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!