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4 years ago

Which method of moving materials in and out of a cell requires energy?

Chemistry

2 answers:

Galina-37 [17]4 years ago

6 0

Answer:

Active Transport

Explanation:

As the name suggests, in active transport you need energy to move materials in and out. Similar to how if you want to be active you need energy, same goes with movements in our cells as well.

dedylja [7]4 years ago

6 0

The answer:
Active Transport

Explanation:
Passive Transport DOES NOT require energy from the cell. And transports like diffusion, facilitated diffusion and osmosis DO NOT require energy. ACTIVE TRANSPORT REQUIRES ENERGY

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Fill in the missing piece of the table

djyliett [7]

Answer: The final volume $V_2$ is 263.09 ml

Explanation:

To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=156ml\\T_1=215^oC=(215+273)K=488K\\V_2=?\\T_2=550^0C=(550+273)K=823K$

Putting values in above equation, we get:

$\frac{156}{488}=\frac{V_2}{823}\\\\V_2=263.09ml$

Thus final volume $V_2$ is 263.09 ml

5 0

3 years ago

What type of rock commonly often contains gas bubbles and the mineral(s) hornblende, muscovite, olivine, lucite, and/or plagiocl

olga_2 [115]

Scoria

Explanation:

Scoria is a rock that is commonly made up of gas bubbles and minerals such as hornblende, muscovite, olivine, lucite and or plagioclase.

Scoria is an extrusive igneous rock with a lot of cavities and vesicles indicating gas bubbles.

Scoria is product of basaltic magma.
It has nearly the same composition as basalt since it originates from it.
They silica deficient and very fine grained with holes in them.
The holes shows channels by which trapped gases are forcefully ejected out.
They are usually found associated with cindercone volcanoes.

learn more:

Volcanoes brainly.com/question/5055821

#learnwithBrainly

4 0

4 years ago

7. With solutions of strong acids and strong bases, the word strong refers to

Mumz [18]

Answer:

C. Degree of ionization

Explanation:

The strength of an acid or a base is determined by how many H+/H3O+ or OH- ions are dissociated in solution. Therefore, it's describing the degree of ionization.

Example: HCl is a strong acid because in water it will pretty much 100% dissociate into H+ and Cl- ions.

4 0

3 years ago

Consider the following reaction: CO(g)+2H2(g)⇌CH3OH(g) This reaction is carried out at a different temperature with initial conc

Anni [7]

Answer:

Ka = 4.76108

Explanation:

CO(g) + 2H2(g) ↔ CH3OH(g)

∴ Keq = [CH3OH(g)] / [H2(g)]²[CO(g)]

[ ]initial change [ ]eq

CO(g) 0.27 M 0.27 - x 0.27 - x

H2(g) 0.49 M 0.49 - x 0.49 - x

CH3OH(g) 0 0 + x x = 0.11 M

replacing in Ka:

⇒ Ka = ( x ) / (0.49 - x)²(0.27 - x)

⇒ Ka = (0.11) / (0.49 - 0.11)² (0.27 - 0.11)

⇒ Ka = (0.11) / (0.38)²(0.16)

⇒ Ka = 4.76108

7 0

4 years ago

What is the frequency of a photon with a wavelength of 3.75×10^-7

Afina-wow [57]

Answer:

Frequency = 0.8×10¹⁵ Hz

Explanation:

Given data:

Frequency of photon = ?

Wavelength of photon = 3.75 ×10⁻⁷ m

Solution:

Formula:

Speed of photon = wavelength × frequency

Frequency = speed of photon / wavelength

Now we will put the values in formula.

Frequency = 3 ×10⁸ m/s / 3.75 ×10⁻⁷ m

Frequency = 0.8×10¹⁵ s⁻¹

s⁻¹ = Hz

Frequency = 0.8×10¹⁵ Hz

3 0

3 years ago