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yawa3891 [41]
3 years ago
13

To support life, why must a planet have roughly circular orbits around a star?

Chemistry
1 answer:
zhannawk [14.2K]3 years ago
8 0
Assuming the planets orbit is in the Goldilocks zone (the distance from the star where the temperature is just right), if the orbit was too irregular or elliptical, the planet would fly out too far to where it is too cold to maintain life and sustain liquid water, and the planet would fly too close to the star making it too hot and unable to support life.
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What is the mass of 5.26 mol Fe2(SO4)3?<br> Answer in units of g.
dsp73
<h3>Answer:</h3>

2100 g Fe₂(SO₄)₃

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Stoichiometry</u>

  • Using Dimensional Analysis

<u>Atomic Structure</u>

  • Reading a Periodic Table
<h3>Explanation:</h3>

<u>Step 1: Define</u>

5.26 mol Fe₂(SO₄)₃

<u>Step 2: Identify Conversions</u>

Molar Mass of Fe - 55.85 g/mol

Molar Mass of S - 32.07 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of Fe₂(SO₄)₃ - 2(55.85) + 3(32.07) + 12(16.00) = 399.91 g/mol

<u>Step 3: Convert</u>

  1. Set up:                               \displaystyle 5.26 \ mol \ Fe_2(SO_4)_3(\frac{399.91 \ g \ Fe_2(SO_4)_3}{1 \ mol \ Fe_2(SO_4)_3})
  2. Multiply/Divide:                 \displaystyle 2103.53 \ g \ Fe_2(SO_4)_3

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

2103.53 g Fe₂(SO₄)₃ ≈ 2100 g Fe₂(SO₄)₃

3 0
3 years ago
What element is tungsten
VikaD [51]

Tungsten, or wolfram, is a chemical element with symbol W and atomic number 74. The name tungsten comes from the former Swedish name for the tungstate mineral scheelite, tung sten or "heavy stone".


Pasted from bing btw

3 0
3 years ago
Read 2 more answers
A thermite reaction realeses large amounts of heat and light resulting in the melting of the iron metal
lara [203]

Answer:

1. Fe₂O₃ : Al = 1 : 2

2. Fe₂O₃ : Al₂O₃ = 1 : 1

3. Fe₂O₃ : Fe = 1 : 2

Note: The question is incomplete. The complete question is given below :

A thermite reaction releases large amounts of heat and light, resulting in the melting of the iron metal that forms during the reaction. The balanced chemical equation is given below: Fe₂O₃(s) + 2Al(s) ---> Al₂O₃(s) + 2Fe(l) Determine the correct mole ratios for the following substances, based on this chemical equation.

Explanation:

A thermite reaction is a highly exothermic reaction that occurs between a mixture of powdered aluminium and iron (iii) oxide.

The reaction is a redox reaction which produces aluminium oxide and metallic iron.

The heat given out in the reaction melts the iron formed. It is used to join railway tracks or cracked machine parts. The molten iron runs down between the tracks and welds them together.

The balanced equation of the reaction is given below :

Fe₂O₃(s) + 2Al(s) ---> Al₂O₃(s) + 2Fe(l) + Heat

The mole ratio of the reactant and products are as follows:

1. 1 mole of Iron (iii) oxide and 2 moles of aluminium are combined

Fe₂O₃ : Al = 1 : 2

2. 1 mole of aluminium oxide is produced from 1 mole of iron (iii) oxide

Fe₂O₃ : Al₂O₃ = 1 : 1

3. 2 moles of of iron are produced from 1 mole of iron (iii) oxide

Fe₂O₃ : Fe = 1 : 2

4 0
3 years ago
How are isotopes of the same element alike? different?
Margaret [11]
Isotopes are elements with the same number of protons but different number of neutrons
5 0
3 years ago
Which is the highest at the top of a hill? *
Romashka-Z-Leto [24]
Potential energy

Explanation:because when your not moving at the highest point you have potential energy
6 0
3 years ago
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