Which of the following is true about the distribution of water in the hydrosphere?

1 answer:

5 0

The answer is: C. The amount of water in the hydrosphere remains constant.

The hydrosphere denotes the entire water available worldwide in lakes and streams, subsurface water, the ice of glaciers, and water vapor in the atmosphere. The water cycle is the process that converts liquid water to atmospheric water vapor (and vice versa) throughout the world.

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Perform the following

vivado [14]

The correct number of significant figures and digits is 3

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3 years ago

Identify the products in: CH4 + 2O2 2H2O + CO2

tatuchka [14]

CH4 + 2O2-----> 2H2O + CO2
reactants products

Reactants are CH4, O2
Products H2O, CO2

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4 years ago

Calcium hypochlorite (ca(ocl)2, mw = 142.983 g/mol) is often used as the source of the hypochlorite ion (ocl–, mw = 51.452 g/mol

stiv31 [10]

When the concentration is expressed in ppm, that means parts per million. It is also equivalent to mg/L. For this problem, we do stoichiometric calculations. We manipulate the units by cancelling like units if they appear in the numerator and denominator side until we come with the amount of solid Ca(OCl)2 needed. The solution is as follows:

40 mg/L * (1 L/1000 mL) * 50 mL * (1 g/1000 mg) * (1 mol OCl⁻/51.452 g) * (1 mol Ca(OCl)₂/ 2 mol OCl⁻) * (142.983 g Ca(OCl)₂/mol) * 0.95 = 2.64×10⁻3 g or 2.64 mg.

Therefore, you would need 2.64 mg of solid Ca(OCl)₂.

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4 years ago

A hydrate of copper (II) chloride has the following formula: CuCl2 - x H2O. The water in a 3.41-g sample of the hydrate was driv

lianna [129]

Answer:

x=2 ( $CuCl_{2} .2H_{2}O$

Explanation:

Mass of $CuCl_{2}$ is the mass of remaining sample, because it is a product of loss of drying from initial sample. This means that the mass of water is the mass has been lost.

after fing the masses of $CuCl_{2}$ and water you must to find the amount of moles in both cases.

$Mass of water=3.41g-2.69g=0.72gH_{2}O$

$molH_{2}O= 0.72g H_{2}O.\frac{1molH_{2}O}{18gH_{2}O} =0.04molH_{2}O$

$molCuCl_{2} =\frac{1molCuCl_{2}}{133.546gCuCl_{2}} = 0.02molCuCl_{2}$

Now you must to find the ratio between both molecules:

$x=\frac{molH_{2}O }{molCuCl_{2} }=\frac{0.04mol}{0.02mol} =2$

So the water is two times copper(II) chloride. ( $CuCl_{2} .2H_{2}O$

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4 years ago

Which is the most important reason to continue efforts to preserve coral reefs

Maslowich

Coral reefs support a wide variety of organisms. They are very sensitive and are a main part in the ocean life.
a.
Coral reefs are a valuable commodity in the aquarium business.
b.
Coral reefs support a wide variety of organisms.
c.
Coral reefs are one of the oldest ecosystems.
d.
Coral reefs are important for marine recreation.

Its B Coral reefs support a wide variety of organisms.

6 0

3 years ago