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4 years ago

Which statement best describes a chemical reaction?

Chemistry

1 answer:

ziro4ka [17]4 years ago

7 0

Answer:

In a chemical reaction, one or more substances called reactants are combined or broken down to form products.

Explanation:

Chemical reaction:

In a chemical reaction one or more substance converted into the another substance.

The substances that reacts or combine during the chemical reaction are called reactants while the new species formed as a result of chemical reaction are products.

There are different types of reaction given below:

Decomposition reaction:

It is the reaction in which one reactant is break down into two or more product.

AB → A + B

Synthesis reaction:

It is the reaction in which two or more simple substance react to give one or more complex product.

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

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determine the maximum amount of NaN03 that was produced during the experiment. Explain how you determined the amount

Angelina_Jolie [31]

Answer:

9 moles of NaNO3 is obtained

Explanation:

The balanced chemical reaction equation for the reaction is;

Al(NO3)3 + 3NaCl-------> 3NaNO3 + AlCl3

Now, we have to determine the limiting reactant. The limiting reactant yields the least amount of NaNO3.

1 mole of Al(NO3)3 yields 3 moles of NaNO3

4 moles of Al(NO3)3 yields 4 * 3/1 = 12 moles of NaNO3

Also,

3 moles of NaCl yields 3 moles of NaNO3

9 moles of NaCl yields 9 * 3/3 = 9 moles of NaNO3

Hence, NaCl is the limiting reactant and 9 moles of NaNO3 is obtained.

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3 years ago

Why is graphite used instead of gold or copper wires to conduct electricity in very hot situations such as an industrial kiln?

Molodets [167]

It wont melt like gold and copper would at that temperature

4 0

4 years ago

Read 2 more answers

Blank occurs when water molecules at the surface of a pool have enough kinetic energy that the attractive forces holding them to

Hunter-Best [27]

Evaporation occurs when water molecules at the surface of a pool have enough kinetic energy that the attractive forces holding them to the liquid can be overcome

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3 years ago

2. Which balanced equation represents an oxidation-reduction reaction?

uranmaximum [27]

Answer:

C) Fe(s) + S(s) →FeS(s)

Explanation:

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4 years ago

What units do chemists normally use for the density of liquids and solids? For the density of gas? Explain the differences.

beks73 [17]

Answer:

Densities of the solids and the liquids are expressed in units of grams per cubic centimeter (g/cm³) or in grams per milliliter (g/mL).

Densities of the gases are usually expressed in the units of grams per liter (g/L).

Explanation:

Density of a substance can be defined as the ratio of its mass and its volume.

The constituting atoms in the solids and liquids are fairly packed closely together.

In general, a 1 cm³ or 1 mL volume of most of the solids and the liquids has mass of several grams. Thus, densities of the solids and the liquids are expressed in units of grams per cubic centimeter (g/cm³) or in grams per milliliter (g/mL).

The constituent atoms or the molecules in the gases are far apart from each other when compared to the solids and the liquids.

Thus, gases are much less dense and even about 1 L of gas have mass in range close to 1 gram. Thus, densities of the gases are usually expressed in the units of grams per liter (g/L).

Also, the density of the gases also depend upon the pressure and the temperature but these factors much not influence the density of the solids and the gases.

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4 years ago