Cell membranes are selectively permeable. This means that A. only water can move freely across the cell membrane. B. any substance can move across the cell membrane, but chemical energy will always be required. C. some substances can move freely across the cell membrane, while others must be transported. D. no substances can move freely across the cell membrane.

Answers

Answer 1

Answer:

C. some substances can move freely across the cell membrane, while others must be transported.

Explanation:

Related Questions

The equivalence point of a titration corresponds to which of the following?
O the point where equal volumes of acid and base have been used
O Equivalence point is another term for end point
All of the listed options are true
Equivalence point is defined as the point where the pH indicator changes color
O the point where the acid and base have been added in proper stoichiometric amounts

Answers

Answer:

E: the point where the acid and base have been added in proper stoichiometric amounts

Explanation:

Equivalence point in titration is simply the point where the amounts of acid and base used just sufficiently reacts chemically to cause neutralization whereas the endpoint is the point where the indicator of the titration changes colour.

The Equivalence point occurs before the endpoint.

Thus, option E is correct.

In calorimetry, energy is measured through heat transfer from one substance to
another. Which of the following is NOT a method of heat transfer?

Answers

I think you forgot to add a picture?

Answer:

Refraction

Explanation:

A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated cylinder to obtain approximately 0.6 M HCl. This solution was titrated with the original NaOH solution. The student calculated the concentration of NaOH from the experiment to be 0.099 M. In which experiment should the student be more confident of the concentration of the NaOH solution

Answers

Answer:

Following are the solution to the given question:

Explanation:

Each method through KHP is somewhat more precise since we have weighed that requisite quantity, we exactly know the KHP intensity appropriately. Its initial 6 M HCl concentration was never considered mandatory. They have probably prepared 6 M HCl solution although long ago and could have changed its concentration over even a period.

Inquiry Extension Consider a reaction that occurs between solid potassium and chlorine gas. If you start with an initial mass of 15.20 g K, and an initial mass of 2.830 g Cl2, calculate which reactant is limiting. Explain how to determine how much more of the limiting reactant would be needed to completely consume the excess reactant. Verify your explanation with an example

Answers

The 3.13 g of K would be needed to completely react with the remaining [tex]Cl_2[/tex].

To determine which reactant is limiting, we need to calculate the amount of product that can be formed from each reactant and compare them. The reactant that produces less product is the limiting reactant, since the reaction cannot proceed further once it is consumed.

The balanced chemical equation for the reaction between solid potassium and chlorine gas is:

2 K(s) + [tex]Cl_2[/tex](g) -> 2 KCl(s)

From the equation, we can see that 2 moles of K react with 1 mole of [tex]Cl_2[/tex] to form 2 moles of KCl.

First, we need to convert the masses of K and [tex]Cl_2[/tex] into moles:

moles of K = 15.20 g / 39.10 g/mol = 0.388 mol

moles of [tex]Cl_2[/tex] = 2.830 g / 70.90 g/mol = 0.040 mol

Now, we can use the mole ratio from the balanced equation to calculate the theoretical yield of KCl from each reactant:

Theoretical yield of KCl from K: 0.388 mol K x (2 mol KCl / 2 mol K) = 0.388 mol KCl

Theoretical yield of KCl from [tex]Cl_2[/tex]: 0.040 mol [tex]Cl_2[/tex] x (2 mol KCl / 1 mol [tex]Cl_2[/tex]) = 0.080 mol KCl

We can see that the theoretical yield of KCl from K is 0.388 mol, while the theoretical yield of KCl from [tex]Cl_2[/tex] is 0.080 mol. Therefore, the limiting reactant is [tex]Cl_2[/tex], since it produces less product.

To determine how much more of the limiting reactant would be needed to completely consume the excess reactant, we can use the stoichiometry of the balanced equation.

We know that 1 mole of [tex]Cl_2[/tex] reacts with 2 moles of K to produce 2 moles of KCl. Therefore, the amount of additional K needed to react with the remaining [tex]Cl_2[/tex] can be calculated as follows:

moles of K needed = 0.040 mol [tex]Cl_2[/tex] x (2 mol K / 1 mol [tex]Cl_2[/tex])

= 0.080 mol K

This means that 0.080 moles of K would be needed to completely consume the remaining [tex]Cl_2[/tex]. We can convert this to a mass by multiplying by the molar mass of K:

mass of K needed = 0.080 mol K x 39.10 g/mol

= 3.13 g K

Therefore, The 3.13 g of K would be needed to completely react with the remaining.

Example verification:

Suppose we had an additional 0.50 g of [tex]Cl_2[/tex] in the reaction. Would all of the K be consumed, or would there still be excess K?

Moles of additional [tex]Cl_2[/tex] = mass of [tex]Cl_2[/tex] / molar mass of [tex]Cl_2[/tex]

Moles of additional [tex]Cl_2[/tex] = 0.50 g / 70.90 g/mol

Moles of additional [tex]Cl_2[/tex] = 0.0070 mol

The theoretical yield of KCl that can be formed from the additional [tex]Cl_2[/tex] is:

0.0070 mol [tex]Cl_2[/tex] x (2 mol KCl / 1 mol [tex]Cl_2[/tex]) x (74.55 g KCl / 1 mol KCl) = 1.04 g KCl

Therefore, the total amount of KCl that can be formed from all of the [tex]Cl_2[/tex] is:

5.95 g + 1.04 g = 6.99 g

The amount of K that would be needed to completely consume all of the [tex]Cl_2[/tex].

Learn more about Solid Potassium at

brainly.com/question/27549056

#SPJ1

Other Questions

During the English Renaissance, who were sonnets typically addressed to?A. Dead relatives that the poet was mourningB. Heroes that the poet admiredC. Men that the poet was in love withD. Women that the poet was in love with From details in the passage, what can you infer about the civilization and era that produced the story of Phoebus and Phaeton? Two cell organelles are described below.Organelle A: Present in plant cells but not present in animal cellsOrganelle B: Much larger in size in plant cells than in animal cellsWhich of the following is most likely correct? Organelle A is vacuole, Organelle B is chloroplast Organelle A is chloroplast, Organelle B is vacuole Organelle A is nucleus, Organelle B is mitochondria Organelle A is mitochondria, Organelle B is nucleus How did new ideas change the way people lived in China ? Why are both plant and animal fossils Important in geology?They both give clues about the life in the past,They both provide information when the next meteor will hit Earth,They both provide information when the next meteor will hit EarthThey both provide information where earthquakes can occur Which of the following measures cannot be determined from a box plot?select all that apply.A. Interquartile rangeB. MeanC. Mean absolute deviationD. MedianE. ModeF.Range What causes the protagonist of "The Green Morning" faint when he gets to Marsa. over excitementb. the flu c. lack of oxygen d. the site of the landscape Cmo ser la moda en cien aos, en 2017? Pues, creo que los vestidos sern mas cortos ylos estilos sern diferentes. En mi opinin, habr ms mujeres que trabajan fuera de casa, yestas mujeres necesitarn ropa para llevar al trabajo. Para la oficina preferirn ropacmoda, de telas flexibles como el algodn. Gracias a la inclusin de las mujeres en elmercado laboral, ellas tendrn ingresos y podrn comprar ms ropa, zapatos y accesorios.Necesitarn una variedad de diseos: algunos para la oficina, otros ms divertidos paracenas y eventos sociales, y todava otros para eventos especiales: vestidos de seda, bolsosde cuero, y abrigos de buena calidad. Pienso que tendremos ropa pret-a-porter en el futuro;es decir, lista para llevar, con tallas estndares. Este tipo de ropa valdr menos dinero,aunque la calidad no ser tan buena como la de la ropa hecha a medida. En cuanto a loshombres, pienso que con el paso de los aos ser mucho ms aceptable llevar ropa msinformal en varias situaciones, incluso en el trabajo. Los hombres tambin tendrn opcionesa la hora de elegir colores. La ropa de hombres incluir los colores oscuros de siempre, perotambin habr colores ms vivos y divertidos.Segn la autora del artculo, qu impacto tendr en la moda la incorporacin de las mujeresal mercado laboral? Which of the following best summarizes the outcome of the affair? Which sentence is written in active voice? A. The video game was bought by Badi's friend. B. Richard plays the piano for the jazz band. C. Cathryn's song was written by her father. D. The cookies were made by Rita's mother. (2.810^8)(1.910^4) Which two parallelograms have the same area? Which theory of Interest group politics views interest groups positively?O ElitismHyper pluralismPluralismParticipatory democracy Responding to antiGerman American feeling during World War I, new names were used for_____.a.hot dogs and baked beansc.home-fried potatoesb.frankfurters and sauerkrautd.pickles and coleslawPlease select the best answer from the choices providedABCD A boat is spotted in the water with an angle of depression of 25degrees from the top of a lighthouse that is 89 feet tall. How far away , to the nearest foot, is the boat from the lighthouse ? Question 16 on Why did the colonists need artisans? A. They were part of the colonial military forces. B. They made items other colonists needed. C. They worked on the farms and plantations. O D. They knew how to do different kinds of jobs. Use the figure to answer the question. 8 8 What is the area of the shaded region of the circle in terms of a? Enter the answer in the box. The area of the shaded region is f units squared. 4x-2 x=5can someone help me with this? an example of an atmospheric beauty that occurs in the thermosphere? i need help with french pleaseeeeeeee