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Juliette [100K]
3 years ago
6

How many moles of chromium metal equal 7.52 × 1022 atoms Cr?

Chemistry
1 answer:
grigory [225]3 years ago
8 0

Answer:

0.125 mole

Explanation:

From Avogadro's hypothesis, we discovered that 1 mole of any substance contains 6.02x10^23 atoms.

The statement above suggests that 1 mole of chromium contains 6.02x10^23 atoms.

Now, if 1mole of of chromium contains 6.02x10^23 atoms,

Then Xmol of chromium contains 7.52x10^22 atoms i.e

Xmol of chromium = 7.52x10^22/6.02x10^23

Xmol of chromium = 0.125 mole

Therefore, 0.125 mole of chromium contains 7.52x10^22 atoms

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Complete the transmutation equation below. Assume that there is only one unknown product. Np93239→Pu94239+?
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I have attached the answer. hopefully, i read the problems correctly. let me know if I did not.

both problems are an example of beta decays. when an atoms' atomic number is increased by one. this is symbolized with -1 e

5 0
3 years ago
Which of the following could not act as a medium for a mechanical wave?
Y_Kistochka [10]
I believe it is either A or B
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which of the following is an organic compound? carbon monoxide, sodium chloride, sulfur oxide, water,
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5 0
3 years ago
In the reaction Zn + H+ ---> Zn2+ + H2, Zn is oxidized and H is reduced.
Sever21 [200]

Answer:

2H⁺ + 2e → H₂.

Zn → Zn²⁺ + 2e.

Explanation:

  • The reaction includes two half-reactions:

<em>The reduction reaction:</em>

<em>2H⁺ + 2e → H₂.</em>

  • 2.0 moles of hydrogen ions is reduced by 2 electrons to produce 1.0 mole of hydrogen gas.

<em>The oxidation reaction:</em>

<em>Zn → Zn²⁺ + 2e.</em>

  • 1.0 mole of Zn metal is oxidized to Zn²⁺ and releases 2 electrons.

  • <em>The overall reaction will be:</em>

<em>Zn + 2H⁺  → Zn²⁺ + H₂.</em>

7 0
3 years ago
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How many moles are in 4.67 x 10^26 atoms of Iron?
TiliK225 [7]

Answer:

<h2>775.75 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4.67 \times  {10}^{26} }{6.02 \times  {10}^{23} }   \\  = 775.747508...

We have the final answer as

<h3>775.75 moles</h3>

Hope this helps you

4 0
3 years ago
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