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3 years ago

How is coal formed and why is it considered a nonrenewable resource? (Site 1)

2 answers:

7 0

Answer ; Pressure and heat turned plants into a substance now known as coal. Coal is considered an energy source because it takes lots of of years to form.

Elanso [62]3 years ago

6 0

Answer:

Coal is formed under the ground when pressure is high and there is a lot of heat also to make coal you need dead and composed organisms put together all of this makes a lump of dark coal.

Explanation:

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These organs make urine by removing waste and water from the blood. What organs are shown in the picturehese organs make urine b

Orlov [11]

Answer:

kidneys i think

Explanation:

because

3 0

3 years ago

A = ε l c. (a) Define the terms in the formula: A = ε l c. (Pick your answers using the letter of the correct definition.)

VladimirAG [237]

Explanation:

Using Beer-Lambert's law :

Formula used :

$A=\epsilon \times c\times l$

where,

A = absorbance of solution

c = concentration of solution

l = length of the cell

$\epsilon$ = molar absorptivity of this solution

According to question:

A = (C) : absorbance measured by the spectrometer

c = (B) : concentration, in mol/L, of the stock solution from which the sample was made

l = (A): pathlength of light through the cell

ε = (D) : molar absorptivity, a constant unique to that substance at that wavelength

7 0

3 years ago

Why do solids have a fixed shape?

KIM [24]

D. The particles are tightly packed together

5 0

3 years ago

Read 2 more answers

Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional

rosijanka [135]

Answer:

Coal mining can compromised a lot of our resources one of it is the soil. It is because it eliminates the nutrients of the soil that can affect the vegetation, it destroys the wildlife and habitat. Also, it changes permanently the topography of the area mined.

Explanation:

edge 2020 just did it

4 0

3 years ago

What is the weight in grams of 3.36 x 10^23 molecules of copper sulfate

Llana [10]

Answer:

$m=89.0g$

Explanation:

Hello!

In this case, since we are given the formula units (molecules) of copper sulfate, it is possible to compute the moles of this compound via the Avogadro's number:

$n=3.36x10^{23}molecules*\frac{1mol}{6.022x10^{23}molecules}\\\\n=0.558mol$

Now, given the molar mass of copper sulfate which is 159.60 g/mol, the required mass in grams turns out:

$m=0.558mol*\frac{159.60g}{1mol}\\\\m=89.0g$

Best regards!

5 0

3 years ago