Why are there so many capillaries in the lungs?

1 answer:

6 0

There's a lot of capillaries in the lungs because the blood needs to be transferred and the capillaries are the smallest vessels that can do this.

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A fire that is burning wood will release water vapor and carbon dioxide<br> true or false?

Triss [41]

Answer:

true.

Explanation:

6 0

3 years ago

Which two of the four quantum numbers determine the energy level of an orbital in a multielectron atom? Which two of the four qu

Roman55 [17]

Answer:

The correct answer is - n and l.

Explanation:

The size of an orbital is determined by the principal number of shell which is represented by n. The larger the energy level (n) bigger the size of the orbital. N can be any integer value: 1, 2, 3 . . . . and so on.

l represents the angular momentum or subshell number provides the overall shape of an orbital in this subshell only integer values between 0 and n-1 are permitted.

Thus, n & l are two quantum numbers that determine the energy level of an orbital in a multielectron atom.

5 0

3 years ago

Why does naphthol react with sodium hydroxide? why does ethanol not react to the extent that naphthol does with sodium hydroxide

igomit [66]

Answer:

Conjugate base of naphthol is highly stable but conjugate base of ethanol is unstable.

Explanation:

Naphthol gives acid base reaction with NaOH where naphthol acts as an acid and NaOH as a base.

Reactivity of naphthol towards NaOH is quite high because the conjugate base of naphthol is highly stable. Stability of the conjugate base arises due to delocalization of negative charge on oxygen atom into aromatic naphthalene ring.

Ethanol is not so reactive towards NaOH because the ethoxide ion is highly unstable due to lack of delocalization of negative charge on oxygen atom.

Resonance structures of conjugate base of naphthol has been shown below.