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marin [14]
3 years ago
14

When physical properties are measured their identity will be changed. True or False​

Chemistry
1 answer:
wolverine [178]3 years ago
5 0

Answer:

False

Explanation:

 A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not.

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3 years ago
How many molecules are in 3.5 moles of H2O A. 2.107x10^24 B. 3.87x10^24 C. 21.07 B. 1.72x10^23
Pani-rosa [81]

Answer:

A. 2.107x10^24

Explanation:

1 mole is defined as the particles containing in 12g of 12-C. That is 6.022x10²³ particles.

When you say 1 mole of atoms means 6.022x10²³ atoms, 1 mole of molecules means 6.022x10²³ molecules, etc.

Now, 3.5 moles of H₂O are:

3.5mol * (6.022x10²³ molecules / 1mol) = 2.107x10²⁴ molecules of H₂O.

Thus, right answer is:

<h3>A. 2.107x10^24</h3>
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3 years ago
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Name or write the formula for the following polyatomic ions
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Answer:

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Explanation:

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