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solniwko [45]
4 years ago
9

Which separation procedure is most likely to happen? Freezing a compound will break it down into elements. Filtering a mixture w

ill separate it into substances. Boiling a pure substance will separate it into mixtures. Melting an element will break it down into compounds.
Chemistry
2 answers:
Alona [7]4 years ago
5 0

Answer is: Filtering a mixture will separate it into substances.

Pure substance is made of only one type of atom (element) or only one type of molecule, it has definite and constant composition with distinct chemical properties. Pure substances can be separated chemically, not physically, that is difference between pure substances and mixtures.

Filtration is use for separation of heterogenous mixture, for example, sand and water.

lakkis [162]4 years ago
5 0

The separation procedure involves the separation of mixture of compounds into the respective compounds.

Freezing is a process in which change of state takes place that is the substance in liquid state will change to solid state.

The process of separating solid particles from the liquid or gas by passing through the porous medium like filter paper allowing the liquid to pass through and retains the solid is said to be filtration.

The temperature at which the vapor pressure and atmospheric pressure becomes equal is said to be the boiling point of the substance.

Melting is a process in which change of state takes place that is the substance in solid state will change to liquid state.

Thus, for separation procedure filtering a mixture will separate it into substances.

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What are the four sets of quantum numbers for nickel?
nlexa [21]

The quantum numbers for the last valence electron in nickel are (3, 2, 0, -½).

The electron configuration of nickel is [Ar]4s²3d⁸

The last electron added is a 3d electron, so <em>n</em> = 3 and <em>l</em> = 2.

We construct a table of quantum numbers.

<u>Element </u><em><u>n</u></em><u>  </u><em><u>l</u></em><u>   </u><em><u>m</u></em><u>ₗ mₛ  </u>

    Sc      3 2   2 +½  

    Ti       3 2   1 +½  

    V       3 2   0 +½  

    Cr     3 2   -1 +½  

    Mn    3 2  -2 +½  

    Fe     3 2   2  -½  

    Co    3 2    1  -½  

    Ni     3 2   0  -½  

The quantum numbers for the last electron in nickel are (3, 2, 0, -½).

5 0
4 years ago
A gas has a volume of 10 liters under a pressure of 745 mm of Hg.
aksik [14]

Answer:

Volume is 10.35 L

Explanation:

we are given;

  • Initial volume v₁ is 10 L
  • Initial pressure, P₁ as 745 mmHg
  • New pressure ,P₂ as 720 mmHg

We are required to determine the new volume, V₂

We are going to use the Boyle's law;

According to Boyle's law the volume and the pressure of a fixed mass of a gas are inversely proportional at a constant temperature.

Therefore;

P₁α 1/V

That is;

P = k/V

k = PV

At different conditions;

P₁V₁ = P₂V₂

Rearranging the formula;

V₂ = P₁V₁ ÷ P₂

Thus;

New volume = (10 L× 745 mmHg) ÷ 720 mmHg

                     = 10.35 L

Thus, the new volume of the gas at the new pressure is 10.35 L

8 0
3 years ago
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scoundrel [369]

Answer:

The answer to your question is Endothermic reaction

Explanation:

Endothermic reactions are reactions that absorbe energy from the environment.

All the reactions that needs heat to proceed are endothermic, example: photosynthesis, reactions in the laboratory that are heated, heat our meals.

This is an endothermic reaction because the enthalpy of the products is higher than the enthalpy of the reactants,

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Answer:

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