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zloy xaker [14]
4 years ago
12

Water evaporating from a puddle is an example of a

Chemistry
2 answers:
musickatia [10]4 years ago
6 0

Answer: physical change.

Explanation:

A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.  Example: Corrosion of iron.  

Chemical property is defined as the property of a substance which becomes evident during chemical changes. Example: Reactivity with other substances

A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.  Example: evaporation of water

Physical property is defined as the property of a substance which becomes evident during physical changes. Example: Boiling point

Thus Water evaporating from a puddle is an example of a physical change.

Flauer [41]4 years ago
5 0
It is an example of physical change. The molecules are not changing, so it is not chemical, and a physical property is something that a physical thing has.


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Can someone help me and explain why they got what they got?
allsm [11]

Answer:

24.32 amu

Explanation:

From the question given above, the following data were obtained:

Isotope A (Mg–24):

Mass of A = 24 amu

Abundance (A%) = 79%

Isotope B (Mg–25):

Mass of B = 25 amu

Abundance (B%) = 10%

Isotope C (Mg–26):

Mass of C = 26 amu

Abundance (C%) = 11%

Average atomic mass of Mg =?

Average atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]

= [(24 × 79)/100] + [(25 × 10)/100] + [(26 × 11)/100]

= 18.96 + 2.5 + 2.86

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