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snow_tiger [21]
2 years ago
13

The atomic number of an atom or element is the number of.

Chemistry
1 answer:
blagie [28]2 years ago
5 0

Answer: the number of a chemical element in the periodic system,

Explanation:

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The ability of carbon to attrack electrons is
iVinArrow [24]
I believe it is electronegativity..... because electronegativity is the ability of an atom to attract electron to itself
4 0
4 years ago
Calculate the heat needed to be removed to freeze 45g of water at 0C
alexira [117]

Answer: The heat needed to be removed to freeze 45.0 g of water at 0.0 °C is 15.01 KJ.

Explanation:

  • Firstly, we need to define the term <em>"latent heat"</em> which is the amount of energy required "absorbed or removed" to change the phase "physical state; solid, liquid and vapor" without changing the temperature.
  • Types of latent heat: depends on the phases that the change occur between them;
  1. Liquid → vapor, <em>latent heat of vaporization</em> and energy is absorbed.
  2. Vapor → liquid, latent heat of liquification and the energy is removed.
  3. Liquid → solid, <em>latent heat of solidification</em> and the energy is removed.
  4. Solid → liquid, <em>latent heat of fusion</em> and the energy is absorbed.
  • In our problem, we deals with latent heat of freezing "solidification" of water.
  • The latent heat of freezing of water, ΔHf, = 333.55 J/g; which means that the energy required to be removed to convert 1.0 g of water from liquid to solid "freezing" is 333.55 g at 0.0 °C.
  • Then the amount of energy needed to be removed to freeze 45.0 g of water at 0.0 °C is (ΔHf x no. of grams of water) = (333.55 J/g)(45.0 g) = 15009.75 J = 15.01 KJ.

4 0
4 years ago
What is steam distillation and why is it a preferred technique to purify high boiling liquids that are water-insoluble?
Sauron [17]

Steam distillation is a separation process for temperature sensitive materials and it is used for purification of organic compounds.

The water vapor carries small amounts of the vaporized compounds (water and organic molecules) to the condensation flask. This is preferred technique because allows easy separation of the components by decantation or other suitable methods, because  product od distilation is a two phase system<span> of water and the organic distillate.</span>

5 0
4 years ago
Total and net ionic equation of 2FeCl3(aq)+ 3Mg(NO3)2 (aq)----&gt; 3MgCl2(aq) + 2Fe(NO3)3(aq)
enot [183]
Write balanced molecular, ionic, and net ionic equations<span> (NIE) for each of the ... </span>3.Mg(OH)2(aq) +. 2HCl(aq). →. MgCl2(aq). +. 2H2O(l). Ionic Equation: Mg2+(aq). + ... 2-(aq). +. Ca2+(aq). →. Ca(C2O4)(s). 5. 2(NH4)3PO4(aq) +. 3Zn(NO3)2(aq) → ... 2-(aq<span>). →. MgCrO4(s). 9. </span>2FeCl3(aq<span>). +. </span>3Mg<span>(s). →. </span>3MgCl2(aq<span>) +. </span>2Fe<span>(s).</span>
6 0
3 years ago
Which population will increase?
Ede4ka [16]

Answer:    World 5,306,425,000 6,895,889,000 7,503,828,180

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3 United States 253,339,000 310,384,000 329,256,465

Explanation:

5 0
3 years ago
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