How does density connect to the layers of the earth?

1 answer:

4 0

Our earth is structured around the densities of the materials which make it up. one property of density is that it determines the way materials in a mixture are sorted. this property of the matter results in the layering and structure of earth's atmosphere water crust and interior.

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A gas has a volume of 240.0mL at 25.0 oC and 0.79 atm. Calculate its volume at STP (1 atm and 0 oC).

baherus [9]

Answer:

189.6 mL

Explanation:

As per Boyles law when a gas is kept at a constant temperature and mass in a closed container, the volume and pressure vary inversely.

P1V1= P2V2

Here, P1 = 0.79 atm, V1 = 240 ml, P2= 1 atm

therefore, substituting values in above equation we get

0.79×240 = 1×V2

⇒V2 = 189.6 ml

therefore, its volume at STP (1 atm and 0 oC) = 189.6 ml

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3 years ago

An open tubular gas chromatography column is 35.7 m long and has an inner diameter of 0.250 mm. It is coated on the inside wall

Sidana [21]

Answer:

The retention factor, k is 2.49

Explanation:

According to the theory of High-Performance Liquid Chromatography (HPLC), the retention factor (or capacity), k, of a column is the ratio of the retention time of a retained analyte (toluene) to that of the un-retained solute (methane).

This implies that:

k = $\frac{16.35 (mins)}{ 6.39 (mins)}$ = $\frac{995 (secs)}{399 (secs)}$

retention factor, k = 2.49.

Note that there is no unit for retention factor, as it is a ratio.

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3 years ago

The H-O bonds in H20?

Oksi-84 [34.3K]

Answer:

Each water molecule can form two hydrogen bonds involving their hydrogen atoms plus two further hydrogen bonds utilizing the hydrogen atoms attached to neighboring water molecules.

Explanation:

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3 years ago

Calculate the molarity if 4.5 moles of sodium chloride is dissolved to make 0.15 liters of solution

AlladinOne [14]

Concentration = number of moles / volume
so C = 4.5/0.15
= 30M

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4 years ago

Let’s say you try to get crafty. Instead of directly heating your carbontetrachloride with the Bunsen Burner, you decide it woul

sergejj [24]

Explanation:

Below is an attachment containing the solution.