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3 years ago

Which gases help to control the Earth’s temperature?

Chemistry

2 answers:

GaryK [48]3 years ago

3 0

Answer:

carbon dioxide

Explanation:

Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric level of carbon dioxide.

BARSIC [14]3 years ago

3 0

Answer:

FoOllow me please :)) hope it helps you

Staysafe!

Explanation:

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How many electrons are transferred in the following reaction?

Semmy [17]

Answer:

Explanation:

Oxidation reaction is defined as the chemical reaction in which an atom looses its electrons. The oxidation number of the atom gets increased during this reaction.

$X\rightarrow X^{n+}+ne^-$

Reduction reaction is defined as the chemical reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

$X^{n+}+ne^-\rightarrow X$

For the given chemical reaction:

$Mg(s)+Al^{3+}(aq.)\rightarrow Al(s)+Mg^{2+}(s)$

The half cell reactions for the above reaction follows:

Oxidation half reaction: $Mg\rightarrow Mg^{2+}+2e^-$

Reduction half reaction: $Al^{3+}+3e^-\rightarrow Al$

Magnesium is loosing 2 electrons to form the magnesium cation. Thus, it is getting oxidized. Aluminum anion is gaining 3 electrons to form Aluminum. Thus, it is getting reduced.

Thus, balancing the half-reactions as:-

Oxidation half reaction: $3Mg\rightarrow 3Mg^{2+}+6e^-$

Reduction half reaction: $2Al^{3+}+6e^-\rightarrow 2Al$

Thus, total number of electrons transferred = 6

3 0

4 years ago

Read 2 more answers

Which of the following is not an example of an externality?

irina [24]

Answer:

option A

Explanation:

because acid comes from preparation of fossil fuel

7 0

3 years ago

Iron has many isotopes but only 4 are found in significant amounts in naturally found mixtures. The amounts by mass percent are:

AnnZ [28]

Answer:

The average mass of iron to be is 54.76 amu.

Explanation:

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

Mass of Fe-54 isotope = 53.9396 amu

Percentage abundance of Fe-54 = 5.845%

Fractional abundance of Fe-54 = 0.05845

Mass of Fe-56 isotope = 55.9349 amu

Percentage abundance of Fe-56 = 91.754 %

Fractional abundance of Fe-56= 0.91754

Mass of Fe-57 isotope = 56.9354 amu

Percentage abundance of Fe-57 = 2.119%

Fractional abundance of Fe-57 = 0.002119

Mass of Fe-58 isotope = 57.9333 amu

Percentage abundance of Fe-58 = 0.282%

Fractional abundance of Fe-58 = 0.00282

Average atomic mass of iron :

$=53.9396 amu\times 0.05845+55.9349 amu\times 0.91754 +56.9354 amu\times 0.002119 + 57.9333 amu\times 0.00282=54.76 amu$

The average mass of iron to be is 54.76 amu.

5 0

3 years ago

Does solid melt easily?

Cerrena [4.2K]

<span>Not all solids melt when they are heated. Some may undergo chemical changes as a result of heating. For example paper burns rather than melts</span>

4 0

3 years ago

21. For each of the following precipitation reactions,

Phantasy [73]

I would say B.HS(aq)+NiSO4(aq)

6 0

3 years ago