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3 years ago

All the radioactive elements are found in the last group of the Periodic Table.

Chemistry

2 answers:

Nana76 [90]3 years ago

6 0

Answer:

False

Explanation:

faust18 [17]3 years ago

4 0

I think the awser is false

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Question 9 Multiple Choice Worth 4 points)

Rufina [12.5K]

Answer:

Explanation:

Would you base your career options using science?

Would you base your moral behavior on science? Science is notorious for not being able to answer moral questions.

Would you base the "meaning of life" on science? The meaning of life is hardly a question that the periodic table could answer.

The only option left is plant growth which science could answer.

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3 years ago

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What is anything that has mass and volume

Pavlova-9 [17]

Anything that has mass and volume (takes up space) is called matter.

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3 years ago

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marishachu [46]

Answer:

B. as a food preservative in the manufacture of detergents

.........

8 0

2 years ago

A solution in a dish contains 4.0 grams of salt dissolved in 100 grams of water. If 50 grams of the water evaporates, this is ev

MaRussiya [10]

D. A mixture

If the water is evaporating while the salt remains, it means the two are not chemically bonded and therefore are not a compound.

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3 years ago

Chlorofluorocarbons (CFCs) are no longer used as refrigerants because they destroy the ozone layer. Trichlorofluoromethane (CCl₃

Daniel [21]

Answer:

The molar entropy of the evaporation of Trichlorofluoromethan is 83.516 J/molK.

Explanation:

Entropy :It is defined as amount of energy which is unable to do work or the measurement of randomness or disorderedness in a system.

$S=\frac{Q}{T(Kelvins)}$

Molar heat of molar vaporization of Trichlorofluoromethane = 24.8 kJ/mol

Temperature at which Trichlorofluoromethan boils , T= 296.95 K

The molar entropy of the evaporation of Trichlorofluoromethan :

$=\frac{24.8 kJ/mol}{296.95 K}=0.083516 kJ/mol K = 83.516 J/molK$

The molar entropy of the evaporation of Trichlorofluoromethan is 83.516 J/molK.

8 0

3 years ago