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Alisiya [41]
3 years ago
14

Can Individual atoms be moved and rearranged ?

Chemistry
1 answer:
andriy [413]3 years ago
6 0

Answer:

Yes

Explanation:

Scientists using the latest microscopic technology have found they can move individual atoms around a surface at will, a breakthrough that could have profound implications in the ultra-small world of electronics and even in industry

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How many total atoms are in 0.450 moles of carbon dioxide?
Sergio [31]
Avogadro's number tells you how many atoms are in 1 mol of every element.

So,
1 mol : 6.022x10^23 atoms = 0.450 moles : x atoms

There are 2.7099x10^23 atoms in 0.450 moles
4 0
3 years ago
If 801 J of heat is available, what is the mass in grams of iron (specific heat = 0.45 J/g・°C) that can be heated from 22.5°C to
inysia [295]

Answer:

The correct answer will be "18.25 g".

Explanation:

The given values are:

Specific heat,

C = 0.45 J/g・°C

Heat involved,

q =  801 J

Temperature,

ΔT = 120.0°C-22.5°C

     = 97.5°C

As we know,

⇒  C = \frac{q}{m \Delta T}

On substituting the given values, we get

⇒  0.45=\frac{801}{m(97.5)}

⇒  m = 18.25 \ g

3 0
3 years ago
How many vance electrons does neon need to be stable
Aneli [31]
An element is stable when it has a full outershell.
Generally, most shells after the first can hold 8 electrons.
The first shell can only hold 2

So in order for neon to be stable it must have a full outer shell
The first shell can hold 2
Neon has 10 electrons
10-2=8
The second shell can hold 8
And neon has 8 electrons left

So it must have 8 valence electrons to be stable
8 0
3 years ago
A scientist is unsure about the accuracy of her experiment. She has checked her equipment and found it to be in good working ord
Shkiper50 [21]

Answer:

repeat the experiment

Explanation:

I am big brain. if she wants to know if it is correct, repeating the exact ay would show her if it is right or if she did something wrong

4 0
3 years ago
An aqueous potassium iodate (KIO3) solution is made by dissolving 553 grams of KIO3 in sufficient water so that the final volume
liberstina [14]

Answer:

M KIO3 = 1.254 mol/L

Explanation:

  • molarity (M) [=] mol/L

∴ w KIO3 = 553 g

∴ mm KIO3 = 214.001 g/mol

∴ volumen sln = 2.10 L

⇒ mol KIO3 = (553 g)×(mol/210.001 g) = 2.633 mol

⇒ M KIO3 = (2.633 mol KIO3 / (2.10 L sln)

⇒ M KIO3 = 1.254 mol/L

3 0
3 years ago
Read 2 more answers
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