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Phantasy [73]
3 years ago
7

Theory states that the extraterrestrial forces that have influenced climate rhythms over the last two million years have occurre

d primarily because of cyclical changes in Earth’s orbit around the Sun. Identify which statement is true. A) Every 41,000 years, the tilt of Earth’s spin axis oscillates between 17.5° and 19.5°. B) Every 41,000 years, the tilt of Earth’s spin axis oscillates between 19.5° and 21.5°. C) Every 41,000 years, the tilt of Earth’s spin axis oscillates between 21.5° and 24.5°. D) Every 41,000 years, the tilt of Earth’s spin axis oscillates exactly 21.5°.
Chemistry
2 answers:
Aleonysh [2.5K]3 years ago
4 0

I just had this question the answer is c

uranmaximum [27]3 years ago
3 0

Answer:

Option (C)

Explanation:

The earth's orbit has directly affected the earth's climate over the last 2 million years as it changes over a due course of time which is caused due to the extraterrestrial forces.

The tilt of the earth's imaginary rotating axis is about 23.5° and it keeps on fluctuating in a range between 21.5°  and 24.5°, which takes place over a time period of 41,000 years. This forms a part of the Milankovitch cycle, which led to the experiencing of the episodic ice age on earth.

Thus, the correct answer is option (C).

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Which of these shows a volume of 255 mililiters expressed in liters
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The 1000 to I think that maybe
6 0
2 years ago
Which of the following is the major advantage of using geothermal energy instead of using coal energy? Choice:
maxonik [38]

Answer:

C. Releases less carbon dioxide

Explanation:

since geothermal steams are directly from earths surface they do not have carbon dioxide therefore they can be used to rotate turbines ultimately generating electricity.

5 0
3 years ago
State the number of neutrons in an atom of Ne-20 and the number of neutrons in an atom of Ne-22. choose two answers * 1 point Ne
saveliy_v [14]

Answer:

Ne 20: 10

and

Ne 22: 12

Explanation:

Ne-20:

N = A - Z = 20 - 10 = 10 neutrons

Ne-22:

N = A - Z = 22 - 10 = 12 neutrons

N: number of neutrons

A: mass number

Z: atomic number

8 0
3 years ago
Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s) + N2 (g) → 2Li3N (s) In a particular ex
seraphim [82]

Answer: 6.71 g

Explanation: 6Li(s)+N_2(g)\rightarrow 2Li_3N

{\text{no of moles}}=\frac{\text{Given mass}}{\text{Molar mass}}

{\text {moles of lithium}}=\frac{4g}{6.914g/mol}=0.578moles

\text{moles of nitrogen}=\frac{4g}{28g/mol}=0.143moles

Limiting reagent is the reagent which limits the formation of product. Excess reagent is one which is in excess and thus remains unreacted.

Thus lithium is the limiting reagent and nitrogen is the excess reagent.

As can be seen from the balanced chemical equation,  6 moles of lithium reacts with 1 mole of nitrogen to give 2 moles of lithium nitride.

Thus 0.578 moles of lithium react with 0.096 moles of nitrogen.

6 moles of lithium give = 2 moles of lithium nitride

Thus 0.578 moles of lithium give=\frac{2}{6}\times {0.578}=0.19moles of lithium nitride.

Mass of lithium nitride Li_3N={\text {no of moles}}\times {\text {Molecular mass}}

Mass of lithium nitrideLi_3N={0.192moles}\times {34.83g/mol}=6.71g


8 0
3 years ago
PLEASE HELP WILL GIVE BRAINLIEST
nevsk [136]

Answer:

16. Option c.

Explanation:

The reaction is:

C₈H₁₈ + O₂  →  CO₂ + H₂O

Let's count, we have 8 C, 18 H and 2 O in reactant side

We have 1 C, 2 H and 3 O  in product side

In order to balance the C, we add 8 to CO₂ and to balance the H, we add a 9 to H₂O

Now we have 8 C on both sides and 18 H On both sides. Finally we have 25 O on product side.

C₈H₁₈ + O₂  →  8CO₂ + 9H₂O

To balance the O in product side we must add 25/2, but as it is a rational number, we must multiply x2 to get an integer number (x2 in all the stoichiometry). The balanced reaction is :

2C₈H₁₈ + 25O₂  →  16CO₂ + 18H₂O

with 16 C, 36 H and 50 O, on both sides

7 0
3 years ago
Read 2 more answers
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