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dolphi86 [110]
3 years ago
13

Which of these is an example of a physical change?

Chemistry
2 answers:
Vikki [24]3 years ago
8 0

Answer:

b metal denting

Explanation:

Stella [2.4K]3 years ago
3 0

Answer:

Choice b) Metal denting.

Explanation:

What's the difference between chemical and physical changes? In a chemical change, new substances are created. However, the types of substances stay the same in a physical change.

<h3>a)</h3>

When silver tarnishes, it reacts with a substance that contains sulfur (e.g., \rm SO_3) to produce silver sulfide, which is a substance different from the other two.

Before the change:

  • Silver;
  • A substance that contains sulfur.

After the change:

  • Silver sulfide.

A new substance is created in this change. As a result, this change is chemical.

<h3>b)</h3>

When metal is dented, atoms in the metal slide past each other. The shape of the metal might change, however the substance will still be the same the metal.

Before the change:

  • This particular metal.

After the change:

  • This particular metal.

No substance is created. As a result, this change is physical.

<h3>c)</h3>

When iron rusts in the air, it reacts with oxygen to produce oxides of iron.

Before the change:

  • Iron;
  • Oxygen.

After the change:

  • Oxides of iron.

Oxides of iron are created. As a result, this change is chemical.

<h3>d)</h3>

When gasoline burns in the air, it reacts with oxygen to produce water and carbon dioxide (or carbon monoxide, or both.)

Before the change:

  • Gasoline;
  • Oxygen.

After the change:

  • Water;
  • Carbon dioxide, carbon monoxide, or both.

Water and carbon dioxide/monoxide are created. As a result, this change is chemical.

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I am Lyosha [343]

Answer:

Physical properties are changes in color, weight, mass, density, volume, whether it is freezing, tarnishing, boiling, etc. while chemical properties are changes in the compound of the object such as whether an object is/isn't flammable, affected by acid, it dissolves, ferments, rots, ignites in water, etc.

Explanation:

Physical property examples: a piece of steel is cut in half, a sugar cube is ground up into a powder, ice melts into water, clouds form in the sky, you mow the lawn, the water turned purple when you dropped red and blue dye in it, leaves grow in the spring, ethyl alcohol boils at 79° C, you cut apples up

Chemical property examples: pancakes cook on the griddle, fireworks explode in th sky, Alka-Seltzer gives off carbon dioxide when added to water, roasting a marshmellow, milk sours when left on the counter, burning wood in a bonfire, salt dissolves in water, food is digested in the stomach

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Mark the lime poor conducter of heat and electricity.

  • Hence it's non metal

Yes why no ,Xenon is already has its secured place in modern periodic table.

  • It belongs to group 18,the Helium family and inert gas group having atomic no Z=54
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2 years ago
PLEASE HELP!!!!
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The answer is B.) 10^5

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My teacher never taught me how to do this helpppp!!!!!!!
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Just search up how much the weight is equal to another, then multiply it, thats what i do lol sorry if im no help
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