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asambeis [7]
4 years ago
12

Which statement correctly describes part of the atomic model?

Chemistry
2 answers:
Ganezh [65]4 years ago
5 0
The answer is D.  A is incorrect because neutrons are an integral part of atoms. B is incorrect because electrons can't be in the nucleus. C is false because protons are only outside the nucleus in antimatter.
denis23 [38]4 years ago
4 0

Answer: D

Explanation:

In an atomic model of an atom, the nucleus consists of protons and neutrons while the electrons revolves round its orbitals outside the nucleus. The protons are positively charged while the electrons are negatively charged so as to counter electric charges and make the atom electrically neutral.

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Write the balanced half equation of iron 2 and permanganate in a solution of acid. Show all of your work.
Aleks [24]

Answer:

5Fe⁺² + MnO₄⁻ + 8H⁺ => 5Fe⁺³ + Mn⁺² + 4H₂O

Explanation:

Fe⁺² + MnO₄⁻ +  H⁺ => Mn⁺² + Fe⁺³ +  H₂O

5(Fe⁺² => Fe⁺³ + 1e⁻)      =>                        5Fe⁺² => 5Fe⁺³ + 5e⁻

<u>MnO₄⁻ + 5e⁻ => Mn⁺²    =>   MnO₄⁻ + 8H⁺ + 5e⁻ => Mn⁺² + 4H₂O</u>

                                      =>  5Fe⁺² + MnO₄⁻ + 8H⁺ => 5Fe⁺³ + Mn⁺² + 4H₂O

6 0
3 years ago
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Fantom [35]
Number one: True Number 2: False because hot stars apear as blue-white and cool stars apear as red
7 0
3 years ago
Im hvaing a hard time getting the right answer
Tanya [424]

Answer:

V=23.9mL

Explanation:

Hello!

In this case for the solution you are given, we first use the mass to compute the moles of CuNO3:

n=2.49g*\frac{1mol}{125.55 g}=0.0198mol

Next, knowing that the molarity has units of moles over liters, we can solve for volume as follows:

M=\frac{n}{V}\\\\V=\frac{n}{M}

By plugging in the moles and molarity, we obtain:

V=\frac{0.0198mol}{0.830mol/L}=0.0239L

Which in mL is:

V=0.0239L*\frac{1000mL}{1L}\\\\V=23.9mL

Best regards!

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3 years ago
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Sonja [21]

Answer:

Check the image file attached

Explanation:

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Mazyrski [523]
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3 years ago
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