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Diano4ka-milaya [45]
3 years ago
13

How does the distance between the planet Earth and the Sun compare with the distances between the planet Earth and other stars?

A. The Sun and all the other stars are the same distance from Earth. B. About half of the other stars are closer to Earth than the Sun. C. The Sun is many thousands of times closer to Earth than any other star. D. The other stars are many thousands of times closer to Earth than the Sun.
Chemistry
2 answers:
Paha777 [63]3 years ago
7 0
I think C, but I could be wrong
Virty [35]3 years ago
4 0

the correct answer is C


The average distance from the Earth to the Sun is approximately 150 million kilometers. Proxima Centauri is the next closest star to Earth, and it is located approximately 40 trillion kilometers away.

It takes only a few minutes for light from the Sun to reach the Earth, but it takes a few years for light from Proxima Centauri to reach the Earth. Also, it would take thousands of years for the fastest rocket to travel from the Earth to Proxima Centauri.  (study Island)


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Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below.
zavuch27 [327]

15.63 mol. You need 15.63 mol HgO to produce 250.0 g O_2.

<em>Step 1</em>. Convert <em>grams of O_2 to moles of O_2</em>

Moles of O_2 = 250.0 g O_2 × (1 mol O_2/32.00 g O_2) = 7.8125 mol O_2

<em>Step 2</em>. Use the molar ratio of HgO:O_2 to convert <em>moles of O_2 to moles of HgO </em>

Moles of HgO = 0.8885 mol O_2 × (2 mol HgO/1 mol O_2) = <em>15.63 mol HgO</em>

7 0
3 years ago
Read 2 more answers
Hi everyone how is your guys day huh I believe good right
Kisachek [45]
H, my day has been alright, how’s yours?
7 0
3 years ago
A mineral is made from what in the ground
IrinaK [193]
<span>Minerals are solid substances that occur naturally. They can be made from a single element (like gold or copper) or from a combination of elements.</span>
3 0
3 years ago
What is acid according to arhenias concept?
nignag [31]

Answer:

Acid are those substances which release H + ions when dissolved in water.

Get that hundooo!

7 0
3 years ago
PLEASE HELP!!!!!!
pogonyaev

Answer:

m_{B}^{theoretical}=0.365gB

Y=87.1\%

Explanation:

Hello there!

In this case, since the reaction (A->B) have an initial amount of pure 4-aminobenzoic acid, the first step to compute the theoretical yield is to solve the following stoichiometric setup:

m_{B}^{theoretical}=0.303gA*\frac{1molA}{137.14gA}*\frac{1molB}{1molA}*\frac{165.19 gB}{1molB}\\\\   m_{B}^{theoretical}=0.365gB

Whereas A stands for 4-aminobenzoic acid and B for the benzocaine. Moreover, we compute the percent yield by dividing the actual yield (0.318 g) by the theoretical one (0.365 g):

Y=\frac{0.318g}{0.365g} *100\%\\\\Y=87.1\%

Best regards!

4 0
2 years ago
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