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3 years ago

1. Which combinations of substances resulted in a chemical change?(no answer choices)

Chemistry

2 answers:

SOVA2 [1]3 years ago

6 0

Explanation:

Chemical reaction -

The combination or reaction of two or more substance , which leads to any change in the temperature , evolution of gas , change in color . This type of reaction is called a chemical reaction ,

The example of chemical reaction is as follows -

H₂ ( g ) + O₂ ( g ) ----> H₂O ( l )

In the above reaction , two gases combines together to form a completely new substance with different chemical and physical properties .

Hence , it is a chemical reaction .

Lunna [17]3 years ago

5 0

All chemical reaction between substances results into a chemical change. When two substances just like HCL and NaOH reacts with each other, NaCl means Sodium Chloride salt is formed.

The phenomenon like change in color, change in temperature, release of gas etc when happens ,then it means chemical change has been occurred. e.g

HCl +NaOH ----> NaCl +H2O.

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Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of ·0.0020Ms−1 : 2NH3 (g)→N2 (g

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Answer:250

Explanation:

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Write the symbols for the following isotopes: Its atoms contain 50 electrons and 70 neutrons

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Answer:

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Explanation:

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Match these items. 1. moles per liter of solution solute 2. spreading out Keq 3. substance being dissolved diffusion 4. general

Degger [83]

Answer:

1. moles per liter of solution - Molarity

2. spreading out - diffusion

3. substance being dissolved- solute

4. general equilibrium constant - Keq

5. the substance doing the dissolving in a solution - solvent

6. solubility product constant - Ksp

Explanation:

Number of moles of substance being dissolved in one liter of solution is defined as molarity

Solute is the substance which is dissolved and solvent is the substance into which the solute is dissolved. For example salt is solute and water is solvent.

Ksp defines the solubility product constant which indicates the equilibrium between a solid and solution and the number of ions of solid required to achieve this equilibrium.

Keq depicts the scenario where reactant and product concentrations are constant in a chemical reaction.

Hence, the correct match is

1. moles per liter of solution - Molarity

2. spreading out - diffusion

3. substance being dissolved- solute

4. general equilibrium constant - Keq

5. the substance doing the dissolving in a solution - solvent

6. solubility product constant - Ksp

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3 years ago