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3 years ago

What approximate percentage of the Earth’s freshwater is groundwater?

Chemistry

2 answers:

Andre45 [30]3 years ago

8 0

Answer:

The correct answer is c. 30%

Explanation:

Groundwater is that found below the earth's surface. Groundwater is contained in aquifers. An Aquifer is a geological formation or a part of it, consisting of a permeable material capable of storing a certain significant amount of water. Aquifers can consist of different material, such as sedimentary permeable rocks such as sand stones or mud stones.

In general, it maintains a temperature very similar to the annual average in the area, therefore, in arctic regions, it can freeze.

Groundwater represents around 30% of the world's fresh water.

<u><em>The correct answer is c. 30%</em></u>

grigory [225]3 years ago

4 0

the answer is c.) 30%

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Determine if all the starting material is converted to the product.

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1 year ago

What are the very small particles that make up all matter?

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2 years ago

A solution made by mixing 20.0 g of a non-volatile compound with 125 mL of water at 25°C has a vapor pressure of 22.67 torr. Wha

Ainat [17]

We have that the molecular weight (3sf) of the compound (g/mol)

$m=44.15g/mol$

From the question we are told

A solution made by mixing 20.0 g of a non-volatile compound with 125 mL of water at 25°C has a vapor pressure of 22.67 torr. What is the molecular weight (3sf) of the compound (g/mol).

Generally the equation for the Rouault's law is mathematically given as

P=P_0 N

$22.67=23.8*\frac{\frac{12.5}{18}}{\frac{125}{18}+\frac{15}{m}}\\\\\6.95+\frac{15}{m}=7.29\\\\\frac{15}{m}=7.29-6.95\\\\m=\frac{15}{0.34}\\\\m=44.11g/mol$

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$m=44.15g/mol$

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2 years ago

A solution was found to have a 15.6 % transmittance at 500 nm, its wavelength of maximum absorption, using a cell with a path le

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For the absorbance of the solution in a 1.00 cm cell at 500 nm is mathematically given as

A’ = 0.16138

<h3>What is the absorbance of the solution in a 1.00 cm cell at 500 nm?</h3>

Absorbance (A) 2 – log (%T) = 2 – log (15.6) = 0.8069

Generally, the equation for the Beer’s law is mathematically given as

A = ε*c*l

0.8069 = ε*c*(5.00 )

ε*c = 0.16138 cm-1

then for when ε*c is constant

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A’ = (0.16138 cm-1)*(1.00 cm)

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In conclusion, the absorbance of the solution in a 1.00 cm cell at 500 nm is

A’ = 0.16138