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elena55 [62]
4 years ago
15

In metals electricity is the flow of electrons from one...

Chemistry
1 answer:
inysia [295]4 years ago
8 0
<span>Electrons (negatively charged) are found in almost all the matter we see. They "buzz" around positively charged atomic nuclei; you may be familiar with one not-very-correct representation of an atom.

I hope helped ^-^</span>
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Compared to the sun , all of the stars that can be observed in the night sky are?
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Answer:

small- even though they are huge suns themselves.

Explanation:

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4 years ago
Why doesn't it matter which nonradioactive isotope of oxygen you breathe?
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Isotopes of an element have same atomic number (number of protons) but vary in the mass number (number of neutrons). The chemical reactivity of an element is not affected by the change in mass number. So, for stable isotopes of Oxygen, (Oxygen-16, Oxygen-17 and Oxygen-18) the biochemical pathway of oxygen breathed in during respiration remains unaffected even with different isotopes. Only the radioactive isotopes of oxygen when breathed in may cause serious health hazards as they emit radiations that may damage the internal organs in the body.

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Calculate the molecular mass of N2O3​
Fynjy0 [20]

the answer is 76.01g/mol

and the density:1.4g/cm³

5 0
3 years ago
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5 0
4 years ago
4. Chemical formula, mg (Cl0₃)2
grin007 [14]

Answer:

0.017mole

0.0033M

Explanation:

Given parameters:

Formula of the compound:

           Mg(ClO₃)₂

Mass of the sample  = 3.24g

Unknown:

Number of moles of the sample = ?

Molarity  = ?

Solution:

The number of moles of any substance is given as:

   Number of moles  = \frac{mass}{volume}  

 Molar mass of Mg(ClO₃)₂  = 24 + 2[35.5 + 3(16)]  = 191g/mol

    Number of moles  = \frac{3.24}{191}   = 0.017mole

Molarity is the number of moles of a solute in a solution:

    Molarity  = \frac{number of moles }{volume}  

 Volume given  = 5.08L

  Molarity  = \frac{0.017}{5.08}  = 0.0033M

5 0
3 years ago
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