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noname [10]
3 years ago
9

The cells of multicellular organisms, like you and me, become specialized for particular tasks and communicate with one another

to maintain homeostasis. Cells, tissues and organs all help to maintain the organism's internal environment. But what about a unicellular organism? Does it maintain homeostasis? If yes, what part of the cell plays a part in this process? A) Yes, the DNA directs what happens inside the cell at all times. B) No. Because these cells live in water, internal balance is automatic. C) Yes, the cell membrane along with the nucleus helps maintain internal balance. D) No. Internal balance in unicellular organisms is based on osmosis of water into and out of the cell.
Chemistry
1 answer:
iVinArrow [24]3 years ago
3 0

D) No. Internal balance in unicellular organisms is based on osmosis of water into and out of the cell.

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A boy with pneumonia has lungs with a volume of 1.7 L that fill with 0.070 mol of air when he inhales. When he exhales, his lung
BlackZzzverrR [31]

Answer:

0.053moles

Explanation:

Hello,

To calculate the number of moles of gas remaining in his after he exhale, we'll have to use Avogadro's law which states that the volume of a given mass of gas is directly proportional to its number of moles provided that temperature and pressure are kept constant. Mathematically,

V = kN, k = V / N

V1 / N1 = V2 / N2= V3 / N3 = Vx / Nx

V1 = 1.7L

N1 = 0.070mol

V2 = 1.3L

N2 = ?

From the above equation,

V1 / N1 = V2 / N2

Make N2 the subject of formula

N2 = (N1 × V2) / V1

N2 = (0.07 × 1.3) / 1.7

N2 = 0.053mol

The number of moles of gas in his lungs when he exhale is 0.053 moles

7 0
3 years ago
Plz help I’m pretty confused on this question
sergeinik [125]

Answer:

Bohr model A

Explanation:

It has more valance electrons therefore has more interaction between the atoms and has more electronegativity.

7 0
2 years ago
Exactly 5000 mL of air at 223K is warmed and has a new volume of 8.36 liters. What is the new temperature?
34kurt

Answer:

The new temperature is 373 K

Explanation:

Step 1: Data given

Volume air = 5000 mL = 5.0 L

Temperature = 223K

New volume = 8.36 L

Step 2: Calculate the new temperature

V1/T1 = V2/T2

⇒V1 = the initial volume = 5.0 L

⇒T1 = the initial temperature = 223 K

⇒V2 = the new volume = 8.36 L

⇒T2 = the new temperature

5.0/223 = 8.36 /T2

T2 = 373 K

The new temperature is 373 K

7 0
3 years ago
Name the following compound: HNO3
galben [10]
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5 0
3 years ago
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Marat540 [252]

hydrogen and oxygen atoms

Explanation:

this is because they are non metals and there will be sharing of electrons between the two atoms forming the bond

4 0
3 years ago
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