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3 years ago

Ninety nine percent of the atmosphere is composed of _ and _.

Biology

2 answers:

VARVARA [1.3K]3 years ago

8 0

Answer:

Ninety nine percent of the atmosphere is composed of Nitrogen and Oxygen

Alexeev081 [22]3 years ago

4 0

Answer:

78% nitrogen and 21% oxygen

Explanation:

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Why is the taiga (boreal forest) considered "the driest moist biome" ?

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I believe the answer I the third option

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3 years ago

Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of

ELEN [110]

Answer:

Total 495 liters of natural oil are needed.

Explanation:

It is given that Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of synthetic oil.

It means the ratio of natural oil and synthetic oil is

$\frac{\text{Natural oil}}{\text{Petrolyn motor oil}}=\frac{5}{5+3}=\frac{5}{8}$

Let in order to make 792 liters of Petrolyn oil he needs x liters of natural oil.

It means the ratio of natural oil and synthetic oil is

$\frac{\text{Natural oil}}{\text{Petrolyn motor oil}}=\frac{x}{792}$

Equate both ratios,

$\frac{x}{792}=\frac{5}{8}$

On cross multiplication we get

$8\times x=5\times 792$

$8x=3960$

Divide both sides by 8.

$x=\frac{3960}{8}$

$x=495$

Therefore total 495 liters of natural oil are needed.

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The relative effectiveness of different wavelength of light in photosynthesis is demonstrated by:

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D. An action spectrum

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Which molecules would dissolve well in oil

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Ninety nine percent of the atmosphere is composed of _____ and _____.

Ninety nine percent of the atmosphere is composed of _ and _.