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Misha Larkins [42]
3 years ago
9

Um Test

Chemistry
1 answer:
vitfil [10]3 years ago
8 0

Suspensions

Explanation:

Suspensions are heterogeneous mixtures that contains large particles that can settle out or be filtered.

  • Suspensions are mixtures of small insoluble particles of a solid in a liquid or gas.
  • Examples are:
  1.  powdered chalk in water
  2. muddy water
  3. harmattan

The particles in suspension can settle on standing

Learn more:

Suspension brainly.com/question/1557970

heterogeneous mixture brainly.com/question/1446244

#learnwithBrainly

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Many countries are undergoing an increase in technology and standard of living.

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In which chemical reaction will be heat content of the reactance be more that of the products
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Select the correct answer. What is the number of protons in this carbon atom? A. 12 B. 6 C. 18 D. 24
andrew11 [14]

Answer:

The correct answer is

C. 6 Protons

Explanation:

Carbon is a nonmetallic element that is available in  both organic and inorganic compounds.

    Carbon belongs to group 14 elements in the periodic table,carbon is a chemical element with the symbol C and atomic number 6, it can  form long chains with its own atoms, a feature called catenation.

Two allotropes of carbon available are diamonds and graphites, which have different crystalline structures

The physical properties of carbon vary widely with the allotropic form.

examples are.

  1. Graphite, diamonds and coal are all nearly pure forms of carbon
  2. Diamond is highly transparent. Graphite is opaque and black
  3. Diamond is one of the hardest substances known to man. Graphite is soft and often used as the "lead" in lead pencils
  4. Diamond has a very low electrical conductivity. Graphite is a very good conductor
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8 0
3 years ago
Which of the following is(are) the reason(s) metals are good conductors of heat and electricity? Select all that apply
Mariana [72]

Answer: The question is incomplete and the options are not given but here are the options.

a. Metals can absorb more heat flow than other elements before damage occurs.

b. Particles of metallic structure begin to vibrate faster as they absorb energy.

c. Metals have a larger number of freely moving electrons.

d.Metals have high densities.

e. Metals have high melting points.

The correct options are c,d and e.

c. Metals have a larger number of freely moving electrons.

d.Metals have high densities.

e. Metals have high melting points.

The correct options are c,d and e.

Explanation:

Metals are real good conductor of heat because of the following;

Metals have larger number of freely moving electrons and these electrons move in random motion that is they are not stable, they from from place to place. Current generated in a direction is destroyed by current produced in another direction also.

Metals have high densities which is because their crystal lattice are packed very tight in the metallic structure making the metal bond to be stronger and conduct heat.

Metals have high melting point because that have a very strong metallic bond and this bond require a lot of energy to break, therefore making it to conduct heat and electricity.

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In addition to carbon, hydrogen and oxygen, amino acids also contain?
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Amino acids also contain nitrogen
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