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2 years ago

Need helpppppppppppppppppp

Chemistry

2 answers:

kobusy [5.1K]2 years ago

4 0

Your answer is, all of the above.

Chemical Change

A chemical change occurs on the molecular level and produces a new substance. However, a physical change rearranges molecules and does not produce a new substance.

10 examples of chemical changes

Burning of paper and log of wood

Digestion of food

Boiling an egg

Chemical battery usage

Electroplating a metal

Baking a cake

Milk going sour

Various metabolic reactions that take place in the cells

Rotting of fruits

Decomposition of waste

Impacts of Chemical changes

Anytime a new substance is made, a chemical change takes place. Usually two or more materials are combined and a new substance is formed. A chemical change can produce amazing explosions, like fireworks.

Thus, all of the above is the correct answer. Learn more about "Chemical Changes" here

brainly.com/question/24547616

nadezda [96]2 years ago

3 0

Answer:

none of the above

Explanation:

deposition (gas to solid), sublimation (solid to gas), evaporation, this all is physical change not chemical change

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frutty [35]

In order for carbon to be stable and have 8 electrons, it must make 4 total covalent bonds.

In prefer for oxygen to be stable and have 8 electrons, it must make 2 covalent bonds.

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3 years ago

calculate pressure exerted by 1.255 mol of CI2 in a volume of 5.005 L at a temperature 273.5 k using ideal gas equation

balu736 [363]

Answer:

The pressure is 5.62 atm.

Explanation:

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

P= ?
V= 5.005 L
n= 1.255 mol
R= 0.082 $\frac{atm*L}{mol*K}$
T= 273.5 K

Replacing:

P* 5.005 L= 1.255 mol* 0.082 $\frac{atm*L}{mol*K}$ *273.5 K

Solving:

$P=\frac{1.255 mol* 0.082 \frac{atm*L}{mol*K} *273.5 K}{5.005 L}$

P= 5.62 atm

The pressure is 5.62 atm.

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2 years ago