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
s344n2d4d5 [400]
3 years ago
14

What are 2 reasons molecules cannot pass easily through the cell membrane? What part of the cell membrane helps them get through

?
Chemistry
1 answer:
tatuchka [14]3 years ago
3 0

Answer:

The cell membrane's main trait is its selective permeability, which means that it allows some substances to cross it easily, but not others. Small molecules that are nonpolar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot. A concentration gradient is a just a region of space over which the concentration of a substance changes, and substances will naturally move down their gradients, from an area of higher to an area of lower concentration.

In cells, some molecules can move down their concentration gradients by crossing the lipid portion of the membrane directly, while others must pass through membrane proteins in a process called facilitated diffusion.

Explanation:

there are your two reasons molecules cannot pass easily through the cell membrane and what part of the cell membrane helps them get through is concentration gradient

You might be interested in
ANSWER ASAP thanks
weqwewe [10]

Answer:

Option D: it's ability to lose electrons

Explanation:

Alkali metals are usually discovered in nature. They have highly reactivity at STP conditions (standard temperature and pressure conditions) and easily lose their outermost electron to form positive ions known that have a charge of +1.

Thus, what can determine the extent of reactivity of an alkali metal, is it's ability to lose electrons

5 0
3 years ago
Read 2 more answers
How many grams of oxygen is needed to completely react with 9.30 moles of aluminum
Orlov [11]
Balanced chemical equation:

* moles of oxygen

4 Al + 3 O2 = 2 Al2O3

4 moles Al -------------- 3 moles O2
9.30 moles Al ---------- moles O2

moles O2 = 9.30 * 3 / 4

moles O2 = 27.9 / 4 => 6.975 moles of O2

Therefore:

Molar mass O2 = 31.9988 g/mol

n = m / mm

6.975 = m / 31.9988

m = 6.975 * 31.9988

m = 223.19 of O2


5 0
3 years ago
For the reaction shown, calculate how many moles of NH3 form when 16.72 moles of reactant completely reacts:
Agata [3.3K]

Answer : The moles of NH_3 formed are, 22.3 moles.

Explanation : Given,

Moles of N_2H_4 = 16.72 mol

The given chemical reaction is:

3N_2H_4(l)\rightarrow 4NH_3(g)+2N_2(g)

From the balanced chemical reaction, we conclude that:

As, 3 moles of N_2H_4 react to give 4 moles of NH_3

So, 16.72 moles of N_2H_4 react to give \frac{4}{3}\times 16.72=22.3 moles of NH_3

Therefore, the moles of NH_3 formed are, 22.3 moles.

8 0
3 years ago
Which of these is not an example of a biotic part of the ecosystem? a. grass b. birds c. insects d. weather
Natasha_Volkova [10]
Weather. I'm pretty sure.
8 0
3 years ago
Read 2 more answers
Marijuana most abundant psychoactive chemical is delta-9- tetrahydrocannabinol or
Galina-37 [17]
<h2>Answer:</h2>

<u>Yes the statement is</u><u> True</u>

<h2>Explanation:</h2>

THC is a chemical which stands for delta-9-tetrahydrocannibinol or Δ-9-tetrahydrocannabinol (Δ-9-THC). This chemical is a cannabinoid molecule in marijuana or cannabis that has long been known as the main psychoactive ingredient in marijuana which means that it is the substance that causes users to experience the marijuana high.  It can be detected in the blood up to 20 hours after ingestion, and it's stored in the body fat and organs for three to four weeks after ingestion.

7 0
3 years ago
Read 2 more answers
Other questions:
  • A student is planning a science fair project called does temperature affect how high a basket ball can bounce name at least two
    13·1 answer
  • What property do all gases share
    10·1 answer
  • What is the mass of 3.6 x 10∧24 atoms of Zinc (Zn)?
    11·1 answer
  • In order to construct a Beer's law plot in this experiment, a stock solution of dye must be diluted to multiple different concen
    11·1 answer
  • A burning match will burn more vigorously in pure oxygen than in air because _________ . Select one: a. oxygen is a catalyst for
    6·1 answer
  • Suppose a cart is being pushed by a certain net force. If the net force is doubled, by how much does the acceleration change? Ex
    7·1 answer
  • What is the approximate speed of the car if they drove a distance of 91 km in 3 hours?
    7·1 answer
  • BRAINLIEST!!!!!!! PLEASE HELP!!!!!!!!!!!!!!
    5·1 answer
  • What scientific principles causes the different layers of the Earth?
    15·1 answer
  • Explain preparation of alkanes C--C from industrial source for industrial preparation of alkane​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!