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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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What minimum volume of 0.200 m potassium iodide solution is required to completely precipitate all of the lead in 155.0 ml of a
Blababa [14]
First, we write the balanced equation for this reaction:

2KI + Pb(NO₃)₂ → 2KNO₃ + PbI₂

From this equation, we see that there are 2 moles of potassium iodide required for each mole of lead (II) nitrate. Moreover, we may use the formula:

Moles = volume (in L) * molarity

We find the molar relation ship for KI : Pb(NO₃)₂ to be 2 : 1. So:

M₁V₁ = 2M₂V₂

V₁ = 2M₂V₂/M₁
V₁ = 2 * 0.112 * 0.155 / 0.2
V₁ = 0.1736 L


The volume required is 173.6 mL
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3 years ago
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melamori03 [73]

Answer: possibly diffusion

Explanation:

all particles are in motion unless at a certain degree so they'd spread throughout the room diluting as they continue to spread out.

6 0
2 years ago
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vichka [17]

Answer:

52

Explanation:

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3 years ago
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Ray Of Light [21]

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Answer: Option A

<u>Explanation:</u>

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Similarly, the hydroxide ions which are basic in nature will be in same concentration as that of hydronium ions. So, as the concentration of basic and acidic elements are equal with the same strength of pH, the combination of these ions lead to formation of pure water with the pH being neutral.

7 0
3 years ago
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Answer:

I think is chemical and nuclear

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