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
fredd [130]
3 years ago
14

What is the frequency of this

Chemistry
1 answer:
EleoNora [17]3 years ago
3 0
I can’t see the picture. Can you comment the question
You might be interested in
Na+ leaks through neuron membranes faster than k+ because of the properties of the non-gated leak channels. na+ leaks through ne
Pavlova-9 [17]

Answer: b. False

K+ ions move faster than the Na+ ions through the neuron membranes.

The concentration of Sodium ions outside the cell is very high. The concentration of Potassium ions inside the cells is very high. Leakage channels thus allow sodium ions to move inside the cells and pumps out the Potassium from the cells.

5 0
3 years ago
Tris base has a molecular weight of 121 g/mol. How many grams of tris base would you need to make 250ml of a 200mM SOLUTION
STatiana [176]

Answer:

6.05 g

Explanation:

Molarity of a substance , is the number of moles present in a liter of solution .

M = n / V

M = molarity

V = volume of solution in liter ,

n = moles of solute ,

From the question ,

M = 200mM

Since,

1 mM = 10⁻³ M

M = 200 * 10⁻³ M

V = 250 mL

Since,

1 mL = 10⁻³ L

V = 250 * 10⁻³ L

The moles can be calculated , by using the above relation,

M = n / V  

Putting the respective values ,

200 * 10⁻³ M = n / 250 * 10⁻³ L

n = 0.05 mol

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

n = w / m

n = moles ,

w = given mass ,

m = molecular mass .

From the question ,

m = 121 g/mol

n = 0.05 mol ( calculated above )

The mass of tri base can be calculated by using the above equation ,

n = w / m  

Putting the respective values ,

0.05 mol = w / 121 g/mol

w = 0.05 mol * 121 g/mol

w = 6.05 g

3 0
4 years ago
Read 2 more answers
The graph shows the changes in the phase of ice when it is heated.
Lesechka [4]

Answer:

100 °C, because it is the boiling point of water.

Explanation:

3 0
3 years ago
What are diazonium salts?
shtirl [24]

Answer:

Diazonium salts are a group of organic compounds that share a certain or you can say a unique common R-NH2+X– a group of functions.

8 0
3 years ago
PLEASEEEE HELPPP I BEGGGG FOR HELPPP PLEASEE
belka [17]

Answer:

d

Explanation:

3 0
4 years ago
Read 2 more answers
Other questions:
  • How do I answer questions which asks - What type of bonding do substances that are solid/liquid/gas at room temperature have?
    11·2 answers
  • What is the best description of the acceleration of an object?
    12·2 answers
  • Help - confusion :( The oxidation of copper(I) oxide, Cu2O(s), to copper(II) oxide, CuO(s), is an exothermic process,
    6·1 answer
  • What characteristic of an element shown on the periodic table can help you to predict its melting point
    12·1 answer
  • 4. The mass of a single proton is approximately 1.67 x 10-27 kg. The mass of an electron is
    15·1 answer
  • Which would best help will give brainlist first 1
    6·2 answers
  • In general is it better to measure a large or small sample
    10·1 answer
  • What is a jet stream. in your own words but be more detailed about what you say.
    10·1 answer
  • The water gained 900 J of energy, what was the energy change of the metal?
    7·1 answer
  • 1) Kinetic energy is the energy an object has due to its
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!