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lesya692 [45]
3 years ago
14

If you look up at the night sky long enough, the stars will appear to move across the sky. What is responsible for making the st

ars appear to move across the sky at night?
A. Earth's Revolution

B. Earth's rotation on its axis

C. Earth's position in its orbit

D. Earth's distance from the sun
Chemistry
1 answer:
Solnce55 [7]3 years ago
4 0
I’m very not sure but could be D
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kupik [55]

Answer:

normal flora useful

Explanation:

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5 0
3 years ago
What mass of au is produced when 0.0500 mol of au2s3 is reduced completely with excess h2?
olga_2 [115]

The mass of Au is 19.7 g

The chemical reaction may be

Au₂S₃ + 3H₂ → 2Au + 3H₂S

1 mole of Au₂S₃ gives 2 mole of Au

Then 0.0500 mol of Au₂S₃ gives

0.0500 × 2 / 1

= 0.10 moles.

To find mass

Mass = moles × molar mass

Moles = 0.10.

Molar mass = 197 g

Mass = 0.10 × 197

         = 19.7 g

Hence the mass of Au produces is 19.7 g

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7 0
2 years ago
No tengo pregunta jajaja
masha68 [24]

Answer:

--

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8 0
3 years ago
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Ph represents a solution that has the highest concentration of hydroxide ions?
dlinn [17]
PH is a scale of how much ionic hydrogen is in a substance. The scale runs from 0 to 14. The lower the number on the scale, the more acidic the substance is (that means there are more hydrogen ions than hydroxide ions). The higher the number on the scale, the more basic the substance is (that means that there are more hydroxide ions than hydrogen ions).
5 0
4 years ago
Guyz help me !!! what is pasteurization please don't copy from google
Svet_ta [14]

Answer:

<u><em>Pasteurization:</em></u>

It is the process in which any beverage such as milk or any other liquid is heated at a certain temperature to kill the bacteria and microorganisms that can cause spoilage or fermentation or any other disease.

5 0
3 years ago
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