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Kitty [74]
4 years ago
13

A chemist is given a liquid sample of an unknown substance. The substance can't be separated into it's components by filtration,

evaporation, distillation, paper chromatography, or any other physical means. The chemist then tries yo decompose the substance by a chemical change but can't. Based on the chemist's results, which of the following best describes the unknown sample?
A. Elements
B. Mixture
C. Compound
D. Suspension
Chemistry
2 answers:
iren2701 [21]4 years ago
6 0
Compound IS THE answer
Scorpion4ik [409]4 years ago
6 0

Answer:

A) Elements

Explanation:

A mixture is a composite of two or more components that are combined physical and not through any chemical means. While a suspension is a mixture of a liquid and solid particles. Therefore, in both cases the components can be separated by some physical means.

A compound is a composite of two or more atoms which can be decomposed into simpler systems through chemical processes.

However, element is a single atom which can be neither be simplified any further by physical or chemical means.

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Why are nails made of iron but not barium and phosphorus?
Marta_Voda [28]

Due to the high strength of iron compared to that of barium and phosphorus the nails are made of iron.

Though iron oxidizes to form rust on reacting with water but it does not explode. Whereas barium reacts vigorously with water with evolution of hydrogen gas. Barium on reacting with other nonmetals results in the formation of poisonous substances. Phosphorus is never found in its pure form in nature and is combustible.

Hence, nails are made up of iron but barium and phosphorus are not suitable for making of nails.

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3 years ago
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I do not understand this question if someone could help please
zzz [600]

\bold{\huge{\blue {\underline{ Answer}}}}

  1. <em>Potassium </em><em>=</em><em> </em><em>K3PO4</em><em> </em><em>,</em><em> </em><em>K2O</em><em>, </em><em>KF</em><em>, </em><em>KBr</em><em>, </em><em>KNO2</em><em> </em><em>,</em><em> </em><em>K2SO4</em><em> </em>
  2. <em>Sodium </em><em>=</em><em> </em><em>Na3PO4</em><em> </em><em>,</em><em> </em><em>Na2O</em><em>, </em><em>NaF</em><em>, </em><em>NaBr</em><em>, </em><em>NaNO</em><em>3</em><em> </em><em> </em><em>,</em><em> </em><em>Na2SO4</em>
  3. <em>Magnesium </em><em>=</em><em> </em><em> </em><em>Mg3</em><em>(</em><em>P</em><em>O</em><em>4</em><em>)</em><em>2</em><em> </em><em>,</em><em> </em><em>MgO</em><em>, </em><em>MgF2</em><em> </em><em>,</em><em> </em><em>MgBr2</em><em> </em><em>,</em><em> </em><em>Mg3NO2</em><em> </em><em>,</em><em> </em><em>MgSO4</em><em> </em>
  4. <em>Aluminium</em><em> </em><em>=</em><em> </em><em>AlPO4</em><em> </em><em>,</em><em> </em><em>Al2O3</em><em> </em><em>,</em><em> </em><em>AlF3</em><em> </em><em>,</em><em> </em><em>AlBr3</em><em> </em><em>,</em><em> </em><em>AlNO2</em><em> </em><em>,</em><em> </em><em>Al2</em><em>(</em><em>S</em><em>O</em><em>4</em><em>)</em><em>3</em>
  5. <em>Iron(</em><em>|</em><em>|</em><em>|</em><em>)</em><em> </em><em>=</em><em> </em><em>FePO4</em><em> </em><em>,</em><em> </em><em> </em><em>Fe2O3</em><em> </em><em>,</em><em> </em><em>FeF3</em><em> </em><em>,</em><em> </em><em>FeBr3</em><em> </em><em>,</em><em> </em><em>F</em><em>e</em><em>N</em><em>O</em><em>2</em><em> </em><em>,</em><em> </em><em>Fe2</em><em>(</em><em>S</em><em>O</em><em>4</em><em>)</em><em>3</em><em> </em>
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4 0
2 years ago
Where do flowers come from? They are made through the process of sexual reproduction. Flowers may look simple, but there are act
Licemer1 [7]

Answer:

They're sexual reproduction

Explanation:

A flower throws seed at another flower

4 0
3 years ago
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A gas system has volume, moles and temperature of 9040 mL, 0.447 moles and -35.50 oC, respectively. What is the pressure in atm?
babymother [125]

Answer : The pressure of the gas is, 0.964 atm

Solution : Given,

Volume of gas = 9040 ml = 9.040 L        (1 L = 1000 ml)

Moles of gas = 0.447 moles

Temperature of gas = -35.50^oC=237.5K       (0^oC=273K)

Using ideal gas equation,

PV=nRT

where,

P = pressure of the gas

V = volume of the gas

T = temperature of the gas

n = number of moles of gas

R = gas constant = 0.0821Latm/moleK

Now put all the given values in this formula, we get the pressure of the gas.

P(9.040L)=(0.447moles)\times (0.0821Latm/moleK)\times (237.5K)

By rearranging the terms, we get

P=0.964atm

Therefore, the pressure of the gas is, 0.964 atm

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3 years ago
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A it is 4 i hope it helped you

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4 years ago
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