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konstantin123 [22]
3 years ago
6

What is an astronomical unit? Why is this unit used to measure distances in the solar system?

Chemistry
2 answers:
boyakko [2]3 years ago
7 0
An astronomical unit is a unit of measurement equal to 149.6 kilometers, the mean distance from the center of the earth to the center of the sun.

1 astronomical unit = 92955807.3 miles
VashaNatasha [74]3 years ago
3 0
A astronomical unit is to measure light years.
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They create proteins!
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3 years ago
As the sun heats the surface of the ocean, two layers of water result. What separates the layers.
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3 years ago
How many moles (of molecules or formula units) are in each sample? 79.34 g cf2cl2?
Alona [7]
From the periodic table:
molecular mass of carbon = 12 grams
molecular mass of fluorine = 18.99 grams
molecular mass of chlorine = 35.5 grams
Therefore:
one mole of CF2Cl2 = 12 + 2(18.99) + 2(35.5) = 120.98 grams
Therefore, we can use cross multiplication to find the number of moles in 79.34 grams as follows:
mass = (79.34 x 1) / 120.98 = 0.6558 moles

Now, one mole contains 6.022 x 10^23 molecules, therefore:
number of molecules in 0.65548 moles = 0.6558 x 6.022 x 10^23
                                                              = 3.949 x 10^23 molecules
7 0
3 years ago
There are some exceptions to the trends of first and successive ionization energies. For each of the following pairs, explain wh
NNADVOKAT [17]

Answer:

(b) IE₂ of Ga >  IE₂ of Ge

Explanation:

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Electronic configuration of Ge is [Ar] 3d¹⁰4s²4p²

After 1st ionisation , Ga  becomes [Ar] 3d¹⁰4s² and becomes stable . Its

2 nd ionisation requires higher amount of ionisation energy. In case of Ge , there are 2 electrons in outermost orbital so it becomes stable after ionisation of 2 electrons.

4 0
3 years ago
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Which climate condition will cause the fastest chemical weathering of granite sandstone and shale
Naily [24]

Answer:

1. Tropical Climate

Explanation:

Due to the high heat in tropical climates, the moisture speeds up chemical weathering

6 0
3 years ago
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