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Varvara68 [4.7K]
3 years ago
5

PLEASE HELP ASAP !!!!!!! 

Chemistry
1 answer:
Natali5045456 [20]3 years ago
8 0

In a physical change, the substance just changes the state or physical form without affecting the chemical composition of the substance. Some examples of physical change are phase transitions (melting, evaporation), crushing a bottle, the process of dissolution and so on.

Among the given options, the physical form of the ball of clay changes only when the ball is broken into two separate halves and the ball of clay is flattened into a pan-cake like shape. There would be no change in physical form or state when the ball is thrown into the air or rolled along the ground.

So, the correct answer will be: d. II and IV only

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Which solution has the higher boiling point: 42.0 g c2h6o2 in 0.500 kg of h2o or 35.0 g nacl in 0.500 kg of h2o?
Lelechka [254]

Answer:

  • The NaCl solution will have higher boiling point.

Explanation:

  • C2H6O2 is a molecular substance. Meaning that when it dissolves it will remain this way:

                                  C2H6O2 ---------> C6H12O6 (aq)  

  • Sodiumchloride (NaCl) is an ionic substance. Meaning that when it dissolves, it will create ions:

                                   NaCl(s)-------> Na+(aq) + Cl- (aq)

Conclusion:

  • NaCl is an ionic compound and C2H6O2 is a molecular compound. Ionic compounds have higher boiling points than molecular compounds. Therefore, NaCl will have the higher boiling point.
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Does uranium or barium nucleus have a stronger net force holding its protons
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Answer:

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Hope this helped!

Have a supercalifragilisticexpialidocious day!

7 0
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