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Yuki888 [10]
3 years ago
12

How many planets are in our galaxy? how many are inhabitable by humans?

Chemistry
1 answer:
viktelen [127]3 years ago
3 0

...

100 billion planets are in our galaxy.

About 60 billion planets are inhabitable by humans.


Hope this helps!

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How much nitrous oxide is in the atmosphere ​
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Answer is: 0.330 ppm
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3 years ago
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Which element has the HIGHEST ionization energy? (Hint: it's hardest to remove an electron from this element)
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Argon

Explanation:

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3 years ago
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If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form
tigry1 [53]

Answer:

709 g  

Step-by-step explanation:

a) Balanced equation

Normally, we would need a balanced chemical equation.

However, we can get by with a partial equation, as log as carbon atoms are balanced.

We know we will need an equation with masses and molar masses, so let’s <em>gather all the information</em> in one place.  

M_r:    30.07          236.74

           C₂H₆ + … ⟶ C₂Cl₆ + …  

m/g:    90.0

(i) Calculate the moles of C₂H₆

n = 90.0 g C₂H₆  × (1 mol C₂H₆ /30.07 g C₂H₆)

  = 2.993 mol C₂H₆

(ii) Calculate the moles of C₂Cl₆

The molar ratio is (1 mol C₂Cl₆/1 mol C₂H₆)

n = 2.993 mol C₂H₆ × (1 mol C₂Cl₆/1 mol C₂H₆)

  = 2.993 mol C₂Cl₆

(iii) Calculate the mass of C₂Cl₆

m = 2.993 mol C₂Cl₆ × (236.74 g C₂Cl₆/1 mol C₂Cl₆)

m = 709 g C₂Cl₆

The reaction produces 709 g C₂Cl₆.

6 0
3 years ago
Which of the following latitudes receive the most direct solar energy?
Misha Larkins [42]

Answer:

The answer to your question is D.

Explanation:

The latitudes near the equator receives the most direct solar energy.

Hope this helps :)

8 0
3 years ago
Which scientist discovered the neutron and gave us the current basic model of
Evgesh-ka [11]

Answer:

c

Explanation:

i read a artical on him and it said

love yall;]

6 0
3 years ago
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