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3 years ago

Which of the following is an example of a chemical change? alcohol evaporating (b) water boiling

Chemistry

2 answers:

Elodia [21]3 years ago

5 0

Answer: Option (c) is the correct answer.

Explanation:

A property that does not bring any change in chemical composition of a substance are known as physical properties.

For example, shape, size, mass, volume, density, etc of a substance are all physical properties.

Water boiling, iodine vaporizing , and ice melting are all physical changes.

And, a property that changes chemical composition of a substance is known as chemical property.

For example, precipitation, reactivity, toxicity etc are chemical property.

Therefore, skin burning in the Sun is a chemical property.

Thus, we can conclude that skin burning in the Sun is an example of a chemical change.

stich3 [128]3 years ago

3 0

Alcohol evaporating, water boiling, iodine evaporating and ice melting are all examples of physical changes of state.

skin burning in the sun is a chemical change as the actual skin is chemically altered by the sun

hope that helps

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Answer:

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The computation of the mass is shown below:

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3 years ago

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irinina [24]

Answer:

answers are in attachment

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3 years ago

At 35.0°c and 3.00 atm pressure, a gas has a volume of 1.40 l. what pressure does the gas have at 0.00°c and a volume of 0.950 l

Leona [35]

Answer : The pressure of gas will be, 3.918 atm and the combined gas law is used for this problem.

Solution :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1$ = initial pressure of gas = 3 atm

$P_2$ = final pressure of gas = ?

$V_1$ = initial volume of gas = 1.40 L

$V_2$ = final volume of gas = 0.950 L

$T_1$ = initial temperature of gas = $35^oC=273+35=308K$

$T_2$ = final temperature of gas = $0^oC=273+0=273K$

Now put all the given values in the above equation, we get the final pressure of gas.

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3 years ago

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