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Degger [83]
4 years ago
6

What is an astronomical unit? the average distance between planets in the solar system the average distance between the Earth an

d the moon the approximate diameter of the Sun including its atmosphere the average distance between the Earth and the Sun
Chemistry
2 answers:
Serhud [2]4 years ago
4 0
An astronomical unit (AU) is the average distance between the Earth and the Sun
Aleks [24]4 years ago
4 0

Answer: The average distance between the Earth and the Sun

Explanation: Distance in the solar system (stellar system) is measured in terms of astronomical units due to large distances involved. 1 astronomical unit is equal to nearly 150 million kilometers.

Distances beyond our solar system are usually measured in light years.  For example, The distance of stars from the earth are measured in light years.

1 light year is nearly equal to 6 million million miles.



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What element(s) must be present in a molecule for it to be considered an organic molecule?
Burka [1]
Carbon is the one and only element to make a molecule organic.
4 0
3 years ago
Consider the following reaction:
NeX [460]

For the given reaction, according to the Law of Conservation of Energy, the energy required to decompose Hcl and produce H_{2}+c l_{2} are equal.

Answer: Option C

<u>Explanation:</u>

According to law of conservation's of energy, energy can only be transferred from reactants to product side. So in this process, it is stated that 185 kJ of energy will be needed to decompose it. So that 185 kJ of energy will be getting transferred to produce the creation of hydrogen and chloride in the product side.

So if we see from the reactants side, the energy of 185 kJ is required for decomposition of hydrogen chloride. Similarly, if we see from the product side, the 185 kJ utilized for decomposition is transferred as energy required to create hydrogen and chlorine atoms. This statement will be in accordance with the law of conservation's of energy.

3 0
4 years ago
Read 2 more answers
When lewis structures are drawn, do you only show valence electrons??
Lynna [10]
Yes you do cause its more explanation to
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8 0
3 years ago
3. A student carries out the clay-catalyzed dehydration of cyclohexanol starting with 10 moles of cyclohexanol and obtains 500 m
IrinaK [193]

Answer:

49.45~%

Explanation:

In this case, we have to start with the <u>chemical reaction</u>:

C_6H_1_2O~->~C_6H_1_0~+~H_2O

So, if we start with <u>10 mol of cyclohexanol</u> (C_6H_1_2O) we will obtain 10 mol of cyclohexanol (C_6H_1_0). So, we can calculate the grams of cyclohexanol if we<u> calculate the molar mass:</u>

(6*12)+(10*1)=82~g/mol

With this value we can calculate the grams:

10~mol~C_6H_1_0\frac{82~g~C_6H_1_0}{1~mol~C_6H_1_0}=820~g~C_6H_1_0

Now, we have as a product 500 mL of C_6H_1_0. If we use the <u>density value</u> (0.811 g/mL). We can calculate the grams of product:

500~mL\frac{0.811~g}{1~mL}=405.5~g

Finally, with these values we can calculate the <u>yield</u>:

%~=~\frac{405.5}{820}x100~=~49.45%%= (405.5/820)*100 = 49.45 %

See figure 1

I hope it helps!

6 0
3 years ago
What is the main job of a leaf
DochEvi [55]

Well, I think it's mainly for photosynthesis and gas exchange. A leaf is normally flat, light, and thin, so that the sunlight can get to the chloroplasts in the cells.

8 0
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