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Minchanka [31]
3 years ago
15

PLS HELP ITS URGENT

Chemistry
1 answer:
mamaluj [8]3 years ago
6 0

Answer:

Answer

The answer is option 4

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Where does o2 and CO2 gas exchange occur?
mixer [17]

The O₂ and the CO₂ gas exchange occurs in alveoli. the oxygen gas moves from the lungs and at same time carbon dioxide passe the the lungs from the blood and the gas exchange occurs.

The oxygen gas moves from the lungs and at same time carbon dioxide passe the the lungs from the blood and gas exchange between the alveoli and the tiny blood vessels occurs. the tiny blood vessels are called as the capillaries. the capillaries are located at the alveoli walls. every person has the hundred of millions of the alveoli present in their lungs.

Thus,  in the alveoli the exchange of the oxygen gas and the carbon dioxide gas will occurs.

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1 year ago
Molecular mass meaning in chemistry?
Zina [86]

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Molecular mass is a number equal to the sum of the atomic masses of the atoms in a molecule.

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3 years ago
QUESTION 1 Species diversity is comprised of O Composition and Richness O Richness and Frequency O Evenness and Composition Rich
34kurt

Answer:

The correct option is: Richness and Evenness

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Mademuasel [1]

Answer:

c

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Why must the number of electrons lost equal the number of electrons gained in every redox reaction
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