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Dmitry [639]
3 years ago
12

The Blood-Brain Barrier (BBB) is a semipermeable membrane that separates blood and the brain. Which choices below would successf

ully cross the BBB without any help?
Chemistry
1 answer:
AveGali [126]3 years ago
6 0

Answer:

water, carbon monoxide gas, Small lipid soluble substances

Explanation:

The BBB is a highly selective semi permeable membrane which prevents the solute in the blood from crossing or passing through the central nervous system of human brain.

It separates the blood from the brain.

In the context,

-- Water successfully crosses the BBB without any help. It can cross through diffusion.

-- carbon monoxide gas can cross BBB. Haemoglobin in blood has 200 times more affinity towards the carbon monoxide when it is compared with oxygen. This is why carbon monoxide poisoning affects the brain.

--- Small lipid soluble substances can also cross BBB without any help.

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Why do airbags fill evenly with gases?
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The signal from the deceleration sensor ignites the gas-generator mixture by an electrical impulse, creating the high-temperature condition necessary for NaN3 to decompose. The nitrogen gas that is generated then fills the airbag.

basically, the nitrogen fills the bag

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The equal areas law is Keplers 2nd law of motion of planetary motion. It states that _____
seraphim [82]

An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time. Thus, the speed of the planet increases as it nears the sun and decreases as it recedes from the sun.

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How many kilograms of potassium iodide (ki) are needed to make 1.25 l of a 4.41 m ki solution?
Lapatulllka [165]
C = n/V
n = C×V
n = 4,41M × 1,25L
n = 5,5125 mol

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1 mol --------- 166g
5,5125 mol --- X
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3 years ago
When combining with nonmetallic atoms, metallic atoms generally will?
Svetradugi [14.3K]
Ionic bonding I think?
6 0
3 years ago
If a 2.50 liter container is filled with Ne gas at a pressure of 650 mm Hg and at 25°C, what mass of Ne is in the container?
seraphim [82]

Answer:

1.76 g is the mass of Ne is in the container.

Explanation:

We use the equation given by ideal gas which follows:

PV=nRT

where,

P = pressure of the gas = 650 mm Hg

V = Volume of the gas = 2.50 L

T = Temperature of the gas = 25^oC=[25+273]K=298K

R = Gas constant = 62.3637\text{ L.mmHg }mol^{-1}K^{-1}

n = number of moles of Ne gas = ?

Putting values in above equation, we get:

650mmHg\times 2.50L=n\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 298K\\\\n=\frac{650\times 2.50}{62.3637\times 298}=0.0874mol

Also, molar mass of Ne = 20.1797 g/mol

So, Mass = Moles\times Molar\ mass = 0.0874\times 20.1797 g = 1.76\ g

<u>1.76 g is the mass of Ne is in the container.</u>

7 0
3 years ago
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