Answer:
Some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic core. In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers.
Molecules that are too large to flow across the membrane need help from integral proteins.
Some molecules are too large to diffuse through the membrane channels and too lipid insoluble to diffuse through the phospholipid layer.
Such is the case with glucose and some other monosaccharides,these substances, however, can cross the plasma membrane through the facilitated diffusion process.
The transport of these molecules depends on integral membrane proteins that act as transporters, transferring the molecules to one side of the membrane and the other without coming into contact with its hydrophobic interior.
Intrinsic or integral proteins constitute more than 70% of the total and are totally or partially included within the lipid matrix of the membrane maintained by hydrophobic interactions.
When they are arranged along the membrane, they are called transmembrane, they can pass totally or partially through the bilayer, sticking out one or both of its surfaces.
There are pores and channels in the membrane to pass substances to the interior and exterior of the cells formed by transmembrane proteins.
The passage of ions through ion channels is faster than through "carrier" proteins, since it does not require the union of the ion with the pore protein.
Therefore, we can conclude that molecules that are too large to flow across the membrane need help from integral proteins.
Learn more here: brainly.com/question/14759861
How many dots go around Rubidium in a Lewis Dot Structure?
Answer:
I believe it's one dot in an electron dot diagram (or rubidium)
Explanation:
I hope this helps
What is the fancy name for the cell membrane?
Answer:
plasma membrane
Explanation:
What are some foods that require dry ice
Please answer ...
P
L
E
A
A
E
Answer:
C
Explanation:
Option C: They are all matter, they have mass, take up space and are made of atoms
Mark me brainiestFollowing Rutherford, Niels Bohr developed an improved model of the atom in which the electrons moved around the nucleus in quantized energy shells. Which of the following phenomena could Bohr's model explain but Rutherford's model could not?
Group of answer choices:
spectral emission lines from hydrogen atoms
wave-particle duality of electrons
protons accounting for roughly half of an atom's mass
alpha particles passing through gold foil undeterred
Answer:
spectral emission lines from hydrogen atoms
Explanation:
Write the symbol of each neutral element based
on its Noble Gas Shorthand configuration:
Answer:
1. Co
2. C
3. Ba
Explanation:
The net force on a vehicle that is accelerating at a rate of 1.15 m/s2
is 1,800 N.
What is the mass of the vehicle?
Answer:
1565.2 kgExplanation:
The mass of the vehicle can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]a = \frac{1800}{1.15} \\ = 1565.217...[/tex]
We have the final answer as
1565.2 kgHope this helps you
She boiled the ingredients as the recipe instructed. What kind of change is this?
A. Physical change
B. Chemical change
Answer:
a
Explanation:
42/19K ——->0/-1e+a/bC
Answer:
?
Explanation:
what has a positive charge
Answer:
A proton carries a positive charge and an electron carries a negative charge
Explanation:
is this what u want???
What element does the following orbital notation represent?
1s
2s
2p
3s
Зр
4s
3d
The equilibrium constant, Kc, for the reaction H2 (g) + 2 (g) 2H (g) is 54 at 425 ºC. If the equilibrium mixture contains 0.030 M H and 0.015 M 2 , the equilibrium concentration of H2 is______.
Answer:
[H₂] = 0.0011M
Explanation:
Based on the chemical equation:
H₂(g) + I₂(g) ⇄ 2HI(g)
And Kc is defined as:
Kc = [HI]² / [H₂] [I₂]
Where Kc = 54
And [] represents equilibrium concentration of each compund.
Replacing:
54 = [0.030M]² / [H₂] [0.015]
[H₂] = [0.030M]² / 54* [0.015]
[H₂] = 0.0011MWhich type of chemical bond is formed by the attraction between positive ions and surrounding mobile electrons?
A) ionic
B) nonpolar covalent
C) metallic
D) polar covalent
Answer:
C metallic bond is the answer
Beth pulls a wagon up a hill in 40 seconds. Her friend Adeline pulls the same wagon up the same hill in 30 seconds. Which of the following statements is true?
A. Beth accomplished more work than Adeline.
B. Adeline accomplished more work than Beth.
C. Beth had a greater power output than Adeline.
D. Adeline had a greater power output than Beth.
Answer:
d
Explanation: because they did same thing on was just faster than other one
Answer:
The answer will be D
Explanation:
If Maria winks exactly 5 times every minute while she is awake and she sleeps exactly 8 hours a day, how many times does Maria wink in a day?
A 0.853-g of 90.0% lithium chlorate mixture decomposes with heat to give 313 ml of oxygen gas collected over water at 20 c and 762 mmHg .what is the percentage of LiCLO3 in the mixture?
Answer:
[tex]\%LiClO_3=90.4\%[/tex]
Explanation:
Hello!
In this case, since the undergoing chemical reaction is:
[tex]LiClO_4\rightarrow LiCl+\frac{3}{2} O_2[/tex]
It is widely known that when a gas given off from a reaction is collected over water, we can compute its pressure by minusing the total pressure 762 mmHg and the vapor pressure of water at the experiment's temperature (20 °C) in this case 17.5 mmHg as shown below:
[tex]p_{O_2}=762mmHg-17.5mmHg=744.5mmHg*\frac{1atm}{760mmHg}=0.980atm[/tex]
Next, by using the ideal gas equation we compute the yielded moles of oxygen considering the collected 313 mL (0.313 L):
[tex]n_{O_2}=\frac{PV}{RT}=\frac{0.980atm*0.313L}{0.082\frac{atm*L}{mol*K}*293.15K}\\\\ n_{O_2}=0.0128molO_2[/tex]
Now, via the 3/2:1 mole ratio between oxygen and lithium chlorate (molar mass = 90.39 g/mol), we compute the original mass of decomposed lithium chlorate as follows:
[tex]m_{LiClO_3}=0.0128molO_2*\frac{1molLiClO_3}{3/2molO_2}*\frac{90.39gLiClO_3}{1molLiClO_3} \\\\m_{LiClO_3}=0.771gLiClO_3[/tex]
Now, the percentage is computed as shown below:
[tex]\%LiClO_3=\frac{0.771g}{0.853g} *100\%\\\\\%LiClO_3=90.4\%[/tex]
Best regards!
In the formation of silicon carbide represented by the chemical equation sio2+3c-->sic+2co 8.0 moles of each reactant are available for the reactant.What is the limiting factor?
Answer:
7.3
Explanation:
Is N2 + H2 > NH3 balanced?
Answer:
yes
Explanation:
This can be fixed by multiplying the product contacting nitrogen by 2. o The new chemical equation is N2 +H2 →2 NH3 Reactants Products Nitrogen 2 2 Hydrogen 2 6 Since NH3 is multiplied by a coefficient of 2 there are now 2 nitrogens and 6 hydrogens. The 6 hydrogens come from the 2 multiplied by the subscript of 3.
. A compound contains nitrogen and oxygen in the mole ratio of 1:1. Which of the
following could be the molecular mass of this compound?
14
16
40
30
Answer:
30
Explanation:
Given that;
the compound contains nitrogen and oxygen in the ratio 1:1;
We can say the compound is NO
Now,
Molecular mass of NO;
Molar mass of N = 14g/mol
Molar mass of O = 16g/mol
Molecular mass of NO = 14 + 16 = 30g/mol
C.
If 150 grams of oxygen are produced, how many moles of sodium chlorate decomposed
Answer:
3.13 moles of sodium chlorate are decomposed.
Explanation:
Given data:
Mass of oxygen produced = 150 g
Number of moles of sodium chlorate decomposed = ?
Solution:
Chemical equation:
2NaClO₃ → 2NaCl + 3O₂
Number of moles of oxygen:
Number of moles = mass/molar mass
Number of moles = 150 g/ 32 g/mol
Number of moles = 4.7 mol
Now we will compare the moles of oxygen with sodium chlorate.
O₂ : NaClO₃
3 : 2
4.7 : 2/3×4.7 = 3.13 mol
3.13 moles of sodium chlorate are decomposed.
SiO2 + 3C -> SiC +2CO
If 100 grams of C are to react completely, how many grams of SiO2 are needed?
Answer:
=242.47 g of HF
Explanation:
Moritz is watching his little brother play in a mud puddle. Moritz notices that when his brother stirs it with a stick, after a few moments the dirt settles back to the bottom of the puddle. His brother is creating a . Anjali knows that whole milk has more fat than skim milk. However, the solid fat doesn’t seem to separate from the liquid milk even after it has been in the fridge for a few days. This is evidence that milk is a .
Answer:
1. suspencion
2.colloid
Explanation:
Answer:
Moritz is watching his little brother play in a mud puddle. Moritz notices that when his brother stirs it with a stick, after a few moments the dirt settles back to the bottom of the puddle. His brother is creating a SUSPENSION.
Anjali knows that whole milk has more fat than skim milk. However, the solid fat doesn’t seem to separate from the liquid milk even after it has been in the fridge for a few days. This is evidence that milk is a COLLOID.
1. Which type of heat transfer does a fan give off? Explain why you think that way.
Answer:
Convection is a heat transfer mechanism where heat moves from one place to another through fluid currents. Forced convection is simply using this mechanism in a useful way to heat or cool a home efficiently, such as using a fan.
Explanation:
What are produced when a base is mixed with water?
hydrogen ions
hydroxide ions
oxygen atoms
oxygen ions
Answer:
The answer is hydrogen ions
Which element has 47 protons?
Answer:
silver
Explanation:
GIVING BRAINLEST TO WHOEVER HAS THE RIGHT ANSWER. Plz and Tysm
True or False: Temperature
and pressure increases as the depth increases inside the earth
1. True
2. False
Answer:
true
Explanation:
as you get closer to the center it gets hotter
How many moles are present in 2.3 x 1023 molecules of NH3?
Answer:
I don't know if this is helpful. I'm sorry if it is not.
What is the pH if 0.0256 g of Potassium Hydroxide are dissolved in enough water to make .212 liters of solution? (Hint: you are
solving for poH first and then finding pH)
pH= 11.332
Further explanationKOH⇒K⁺+OH⁻
KOH(MW=56,1056 g/mol)
mol KOH :
[tex]\tt \dfrac{0.0256}{56.1056}=4.56\times 10^{-4}[/tex]
molarity KOH :
[tex]\tt \dfrac{4.56\times 10^{-4}}{0.212}=2.15\times 10^{-3}[/tex]
[OH⁻]=[KOH]=2.15 x 10⁻³
pOH=-log[OH⁻]
[tex]\tt pOH=-log~2.15\times 10^{-3}\\\\pOH=3-log~2.15\\\\pOH=2.668[/tex]
pH+pOH=14
[tex]\tt pH=14-2.668=\boxed{\bold{11.332}}[/tex]
Describe how the location along a specific latitude on Earth relates to the average high temperature. Explain your reasoning...?
Which mistake did Maria make on her diagram
Answer:
Explanation:here’s the diagramm somebody help
