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3 years ago

What is the kinetic molecular model?

Chemistry

2 answers:

gulaghasi [49]3 years ago

8 0

Answer:

It's a theory of gases.

Explanation:

It describes a gas as a large number of submicroscopic particles. In which all of them are in constant, rapid, random motion. The randomness arises from the particles' many collisions with each other and with the walls of the container.

saul85 [17]3 years ago

7 0

Answer:

The kinetic theory of gases describes a gas as a large number of submicroscopic particles, all of which are in constant, rapid, random motion. The randomness arises from the particles' many collisions with each other and with the walls of the container

Explanation:

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Fe2O3 + 3H2 --> 2Fe + 3H2O Is this right?

lesantik [10]

Answer:

3Fe2O3 + H2 --> 2Fe3O4 + H2O

7 0

3 years ago

How much copper is present in a cube that measures 3.20cm on each side, if the density of copper is 8.96 g/mL

Ainat [17]

Answer:

290.32 g

Explanation:

First we calculate the volume of the cube:

Volume = (3.20 cm)³ = 32.768 cm³

Now we convert cubic centimeters to mililiters:

32.768 cm³ * 1 mL / 1 cm³ = 32.768 mL

Finally we calculate the mass, using the equation for density:

Density = mass / Volume

mass = Density * Volume

mass = 8.86 g/mL * 32.768 mL = 290.32 g

7 0

3 years ago

consider the reaction between calcium oxide and carbon dioxide: cao ( s ) + co 2 ( g ) → caco 3 ( s ) a chemist allows 14.4 g of

MakcuM [25]

Answer:

CaO is the limiting reagent

Theoritical yield = 25.71 g

% Yield = 75.44%

Explanation:

1 mole = Molar mass of the substance

Molar Mass of CaO = 56 g/mol

Molar Mass of CaCO3 = 100 g/mol

Molar mass of CO2 = 44 g/mol

The balanced Equation is :

$CaO + CO_{2}\rightarrow CaCO_{3}$

1 mole of CaO reacts with = 1 mole of CO2

56 g of CaO reacts with = 44 g of CO2

1 g of CaO reacts with =

$\frac{44}{56}$

= 0.785 g of CO2

So,

14.4 g of CaO must react with = (14.4 x 0.785) g of CO2

= 11.31 g of CO2

Needed = 11.31 g

Available CO2 = 13.8 g (given)

So CO2 is in excess , hence CaO is the limiting reagent and product will produce from 14.4 g of CaO

$CaO + CO_{2}\rightarrow CaCO_{3}$

1 mole of CaO will produce 1 mole pf CaCO3

56 g of CaO produce = 100 g of CaCO3

1 g of CaO produce =

$\frac{100}{56}$

= 1.785 g of CaCO3

14.4 g of CaO will produce = (1.785 x 14.4) g of CaCO3

= 25.71 g of CaCO3

Theoritical Yield of CaCO3 = 25.71 g

Actual yield = 19.4 g

Percent Yield =

$\frac{Actual\ yield}{Theoritical\ yield}\times 100$

$\frac{19.4}{25.71}\times 100$

= 75.44 %

6 0

3 years ago

A mixture is -

garik1379 [7]

a. a chemical combination of two or more different materials.

For example: For example, air is a mixture of gases, containing N, O, Ar, CO2

4 0

3 years ago

Electrolysis breaks down water to form hydrogen and oxygen gas. The word equation that represents this reaction is: water

Evgen [1.6K]

Answer:

When a reduction reaction and an Oxidation reaction takes place due to passing of current through water the molecules of water split into the compounds. Where it is made up of hydrogen in its state of gas and also Oxygen in its state of gas this method is most vastly is known as electrolysis.

In this process a certain direct current is passed from inside water. This direct current value can be near about 1.23 voltages the reaction that happens inside is given below.

2 Water---> Oxygen + 4 hydrogen ions + 4 Electrons

2 Hydrogen ions + 2 electrons ----> hydrogen gas

6 0

3 years ago