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3 years ago

1. Distinguish between a mixture and a pure substance.

Chemistry

2 answers:

Marina CMI [18]3 years ago

4 0

Answer:

1)Mixture is the combination of substance

2)There are two types of mixture such as heterogeneous mixture and homogeneous mixture

3)foreg=Salt solution ,sedimentation

Pure substance

1)Pure substances are also called elements

2)They are made up of small atoms

3)for eg= oxygen,Venadium ,Iron,Oxygen

Korvikt [17]3 years ago

3 0

Mixture - A mixture is a substance which consist of two or more elements or compounds not chemically combined together.

For Example : Air is a mixture of gases like oxygen,nitrogen,argon,carbon dioxide etc.

Pure Substance - A pure substance is a substance which has only one type of atoms or molecules thereby having a constant composition and structure.

For Example : Hydrogen gas , Gold metal , Sugar , Baking soda, Ammonia , Diamond and etc.

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1) Write the chemical equation.

$CH_4+2O_2\rightarrow CO_2+2H_2O$

2) List the known and unknown quantities.

Sample: CH4.

Volume: 2.0 L.

Temperature: 30 ºC = 303.15 K.

Pressure: 3.0 atm.

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3.1- Set the equation.

$PV=nRT$

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Moles: 0.48 mol.

Temperature: 30 ºC = 303.15 K.

Pressure: 3.0 atm.

Ideal gas constant: 0.082057 L * atm * K^(-1) * mol^(-1).

Volume: unknown.

5.1- Set the equation.

$PV=nRT$

5.2- Plug in the known values and solve for V (liters).

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3.98 L of O2 is required to react with 2.0 L CH4.

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1. Distinguish between a mixture and a pure substance. ​

1. Distinguish between a mixture and a pure substance.