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3 years ago

Which of the following is the most-polluting nonrenewable energy source?

Chemistry

2 answers:

aleksandr82 [10.1K]3 years ago

4 0

The answer is going to be coal

pshichka [43]3 years ago

4 0

Answer: Coal

Explanation: Coal is very extensively used in many places. Coal is a non renewable source of energy which means that they cannot be regenerated again.

Due to the extensive use of coal, it produced a huge amount of sulfur content into the atmosphere, similar to the sulfur that releases into the atmosphere through volcanic eruptions. This sulfur then gets mix up with the atmospheric oxygen, forming sulfur dioxide. Due to this reaction, often acid rain occurs at various places. This increasing content of sulfur dioxide is responsible for the global rise in the temperature, thereby causing significant amount of pollution.

Thus, coal burning is the most polluting energy source.

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What is the number of orbit for calcium

CaHeK987 [17]

It has 20 electrons

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3 years ago

Asolution has a pH of 8. Which best describes the solution?

alekssr [168]

Answer:

a weak base

Explanation:

pH levels:

0-3 Strong Acid

4-6 Weak Acid

7 Neutral

8-10 Weak Base

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3 years ago

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Help please ASAP I’ll mark you as brainlister

noname [10]

Answer: FeO is called ferrous oxide while Fe2O3 is ferric oxide

Explanation:

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3 years ago

calculate the molarity of MgCl2 in the following solution: 5.34 g of MgCl2 is dissolved and diluted to 214 mL of solution.

anyanavicka [17]

$\quad\hookrightarrow\quad \sf {0.262M }$

<h3>Ⲋⲟⳑⳙⲧⳕⲟⲛ :</h3>

Molarity is used to measure the concentration of a solution , so it is also as molar concentration. It is denoted as M or Mol/L

We are given that :

Weight of $\sf MgCl_{2}$ = 5.34g
Volume of solution = 214 ml , or 0.214 L

The molar mass of magnesium chloride ( $\sf MgCl_{2}$ ) is 95.21 g / mol

We can calculate the molarity of the solution by dividing the number of moles of solute by volume of solvent in liter ,i.e:

$\quad\longrightarrow\quad \sf {M = \dfrac{n}{V} }$ ‎ㅤ‎ㅤ‎ㅤ⸻( 1 )

Where,

M = molarity
n = number of moles
V = Volume

We can calculate the number of moles by dividing the actual mass by its molar mass ,i.e:

$\quad\longrightarrow\quad \sf { n = \dfrac{w}{m}}$ ‎ㅤ‎ㅤ‎ㅤ‎⸻ ( 2 )

Where,

n = number of moles
m = molar mass
w = actual mass

Therefore,

$\implies\quad \tt {n =\dfrac{w}{m} }$

$\implies\quad \tt { n =\dfrac{5.35\: g}{95.21\: g /mol}}$

$\implies\quad{\pmb{ \tt {n = 0.056 mol}} }$

Putting the values in equation ( 1 ):

$\implies\quad \tt {M=\dfrac{n}{V} }$

$\implies\quad \tt { M =\dfrac{0.056\:mol}{0.214\:L}}$

$\implies\quad\underline{\pmb{ \tt { M = 0.262 \:M }}}$

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2 years ago

In the lab, frank has two solutions that contain alcohol and is mixing them with each other. he uses 100 milliliters less of sol

VladimirAG [237]

Solution B (17% alcohol) = x ml
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0.17x ml alcohol in Solution B
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0.17x + 0.13(x-100) = 347
0.17x+0.13x-13=347
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3 years ago

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