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Dominik [7]
3 years ago
6

Air is a mixture of various gases. One of the gases is 21% part of the air and is essential for the survival of human beings. Th

is gas is​
Chemistry
2 answers:
konstantin123 [22]3 years ago
7 0

Answer:

Oxygen

Explanation:

Oxygen is 21% of the gases that make up our air

velikii [3]3 years ago
3 0

Answer:

oxygen

Explanation:

Nitrogen is 78%

oxygen is 21%

carbon dioxide is 0.02%

and water vapour and sometime Noble gas varies

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In common speech, some people may use the terms hypothesis and theory interchangeably. In science, however, the terms have diffe
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A hypothesis is something you can test a theory is just a thought that you have.

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How many atoms are in 26.8 g Fe
Tatiana [17]

Answer:

2.881x10^23 atoms

Explanation:

From the studies of Avogadro's hypothesis, we discovered that 1mole of any substance contains 6.02x10^23 atoms.

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3 years ago
Enter a formula in cell b7 to calculate the average value of cells b2:b6
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The Prandtl number, Npr, is a dimensionless group important in heat transfer calculations. It defined as Cuk, where C, is the he
VARVARA [1.3K]

Answer:

The Prandlt number for this fluid is 1630.

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The Prandlt number is defined as:

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