CHEMISTRY HIGH SCHOOL

Which sample is a homogeneous mixture?A) NaCI(s)
B) NaCl(aq)
C) NaCl(g)
D) NaCl(ℓ)

Answers

Answer 1
Answer:

NaCl(aq) is a homogeneous mixture. Hence, option B is correct.

What is a mixture?

A mixture is a substance that is made up of two or more substances that are not chemically combined and in fixed proportions.  

Homogeneous mixtures are present with a similar uniform appearance and composition throughout. Examples are steel, air, salt water, etc.

Homogeneous mixtures may either be, a colloid or a solution.

An aqueous sodium chloride is a homogeneous mixture because NaCl completely dissolves in water, thus giving a single visible phase.

Hence, option B is correct.

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Answer 2
Answer:

NaCl(aq) is a homogeneous mixture.

An aqueous sodium chloride is a homogeneous mixture because NaCl completely dissolves in water, thus giving a single visible phase.

Further Explanation

Mixture  

  • A mixture is a substance that is made up of two or more substances that are not chemically combined and in fixed proportions.  
  • A mixture may have several varying physical properties.
  • There are two types of mixture:

Homogeneous mixtures  

  • These are mixtures with a similar uniform appearance and composition throughout. Examples are, steel, air, salt water, etc.
  • Homogeneous mixtures may either be, a colloid or a solution.

Solutions  

  • Solutions are types of homogeneous mixtures containing two or more substances in a single phase.
  • Solutions contains, a solute which is the substance that dissolves in the other substance, and a solvent which is the substances that dissolves the solute.
  • For example, in a salt solution, water is the solvent and salt is the solute.

Colloid  

  • A colloid is a homogeneous solution that has an intermediate size particles between a suspension and a solution. Examples of colloids are fog and milk.  

Heterogeneous mixtures

  • This is a type of mixture that contain different substances or two or more phases of matter.
  • The components of heterogeneous mixtures are not uniform such that different samples of the mixture are not identical to each other.  
  • Examples of heterogeneous mixtures are; blood, soil, Gravel, etc.

Suspension  

  • It is a type of heterogeneous mixture made of larger particles that are visible and normally settles when the mixture is undisturbed.
  • Examples include, tomato juice, fine sand, etc.

Keywords: Mixtures, homogeneous mixture, Heterogeneous mixture

Learn more about:  

Level: High school  

Subject: Chemistry  

Topic: Mixtures and separation of mixtures  

Sub-topic: Types of mixtures  

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Which pair of compounds can be classified as inorganic? A) nucleic acids and minerals B) proteins and water C) water and salts D) nucleic acids and proteins

Answers

Answer:

The correct answer is option c) water and salts

Explanation:

Organic compounds contain carbon and hydrogen bonds. Both nucleic acids and proteins contain these. Water (H2O) and salts (Ex:NaCl) do not.

Final answer:

The pair of compounds that can be classified as inorganic from the given options are water and salts. These lack a carbon-hydrogen bond, unlike nucleic acids and proteins, which are organic.

Explanation:

The pair of compounds that can be classified as inorganic are water and salts. Inorganic compounds are defined as compounds that do not contain a carbon-hydrogen bond, which makes them different from organic compounds. Both water (H2O) and salts, like table salt (NaCl), do not contain any carbon-hydrogen bonds, so they are considered inorganic compounds. On the other hand, nucleic acids and proteins are both complex structures that include carbon-hydrogen bonds, making them organic compounds.

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The atomic mass of an element is calculated using the(1) atomic number and the ratios of its naturally occurring isotopes(2) atomic number and the half-lives of each of its isotopes(3) masses and the ratios of its naturally occurring isotopes(4) masses and the half-lives of each of its isotopes

Answers

The atomic mass of an element is calculated using its masses and the ratios of its naturally occurring isotopes. The answer is number 3.  The rest of the choices do not answer the question above.

Answer:

#3

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I need help! In an equilibrium reaction with a Keq of 1 × 108 A. products are favored. B. the reaction is nonspontaneous. C. the reaction is endothermic. D. reactants are favored.

Answers

When K is > than 1 products are favored. When q is < less than 1 reactants are favored. 1 x 108 = 108 which is > 1 so products are favored.

Answer: The correct answer is Option A.

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants. It is represented as K_(eq)

For the general reaction:

A+B\rightarrow C+D

Expression for equilibrium constant is given as:

K_(eq)=([C][D])/([A][B])

Conditions for K_(eq) are:

K_(eq)>1, then products are favored

K_(eq)=1, then forward reaction is equal to backward reaction

K_(eq)<1, then reactants are favored

As, K_(eq)=1* 10^8 and is very much greater than 1, so products will be favored.

Hence, the correct answer is Option A.

The relatively high boiling point of water is due to water havingA) hydrogen bonding
B) metallic bonding
C) nonpolar covalent bonding
D) strong ionic bonding

Answers

The answer is A because water molecules don't have metallic bonding, and water is also polar, and it takes more time for the heat energy to break down the hydrogen bonds 

The Bessemer process created strong, lightweight (1 point)steel.
oil.
iron.
coal.

Answers

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17.C Be Trained In Specific Trade.


All of the answers are correct guaranteed.

Good Luck! Hope I helped:)
the correct answer for this question is a steel

Which substance can not be broken down by a chemical change?A) methane B) propanal C) tungsten D) water

Answers

Answer:

The Answer is ELEMENT

Explanation:
okay the answer to your question is Tungsten
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