Which of the following processes is not regarded as contributing to the creation of greenhouse gases

Answers

Answer 1

Answer: If this question has the same list of choices like the previous ones, the answer would be: creating electricity from wind
Creating electricity from wind is not regarded as contributing to the creation of greenhouse gases.

choices are:
deforestation
creating electricity from coal
creating electricity from wind
use of fertilizers

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What is the main pigement for photosyenthesis inchloroplasts

Answers

I assume the answer is chlorophyll (a or b) but could also be carotenoids.

Answer:

the main pigment is chlorophyll.

Explanation:

It is green

A physical property is one that cannot be observed

can be observed by altering the identity

can be changed without altering the identity of a substance

must be observed through chemical means

Answers

The correct answer is the 3rd option A physical property is one that can be changed without altering the identity of a substance. These set of properties is not concentration dependent. They are used to describe matter. Examples are density, solubility, melting point, color and odor.

What ion is most closely associated with bases?

Answers

Arrhenius Bases, so that other compounds that have the hydroxyl group (OH⁻)

hope this helps!

Determine the percent yield for the reaction between 46.5 g of ZnS and 13.3 g of oxygen if 18.l4 g of ZnO is recovered along with an unknown quantity of sulfur
dioxide.
please show work thank you

Answers

The percentage yield of the reaction has been 46.74%.

Percentage yield can be given as the ratio of the actual yield to the theoretical yield.

For the theoretical yield, the balanced equation will be:

$\rm 2\;ZnS\;+\;3\;O_2\;\rightarrow\;2\;ZnO\;+\;2\;SO_2$

Thus, 2 moles of ZnS will give 2 moles of ZnO.

The moles of 46.5 g ZnS:

Moles = $\rm (weight)/(molecular\;weight)$

ZnS = $\rm (46.5)/(97.474)$

ZnS = 0.477 mol

The moles of 13.3 grams Oxygen:

Oxygen = $\rm (13.3)/(32)$

Oxygen = 0.415 mol.

The moles of 18.14 grams ZnO:

ZnO = $\rm (18.14)/(81.38)$

ZnO = 0.222 mol

According to the balanced chemical equation,

2 moles ZnO = 2 moles ZnS

0.222 mol ZnO = 0.222 mol ZnS

2 moles ZnO = 3 moles Oxygen

0.222 mol ZnO = 0.334 mol of Oxygen

Since, both the reactants are in enough concentration,

The theoretical yield can be calculated with any of the reactants. The theoretical yield of ZnO from 46.5 grams of ZnS can be given as:

1 mole ZnS = 1 mol ZnO

0.477 mol of ZnS = 0.477 mol of ZnO.

The mass of 0.477 mol of ZnO:

Mass = moles $*$ molecular weight

Mass of ZnO = 0.477 $*$ 81.38

Mass of ZnO = 38.818 grams.

The theoretical yield of ZnO = 38.818 g.

The actualyield of ZnO = 18.14 g.

Percentage yield = $\rm (18.14)/(38.81)\;*\;100$

Percentage yield = 46.74 %

The percentage yield of the reaction has been 46.74%.

For more information about the percentage yield, refer to the link:

brainly.com/question/11715808

Found an answer sheet :)

What type of reaction takes place when the melting of a solid occurs?

Answers

Thats a chemical reaction. I think

The temperature reading of –14°C corresponds to a Kelvin reading of

Answers

Degrees in Kelvin are always 273 higher than the corresponding celcius degree. Therefore, we just need to add 273 to the celcius degree to find the degree in Kelvin.

-14 + 273 = 259 K

K is the unit of degrees in Kelvin. The answer is 259K.

259 K. took the test

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