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riadik2000 [5.3K]
3 years ago
11

Two compounds are mixed. Which statement is true if there is only a physical reaction? A. The color changes. B. Heat is release

d. C. The mixture precipitates. D. No changes occur.
Chemistry
2 answers:
devlian [24]3 years ago
6 0
I believe it is going to be (A). Pardon me if it is not.
Scorpion4ik [409]3 years ago
5 0
Your answers A hope this helps
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8 0
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Read 2 more answers
4. Chemical formula, mg (Cl0₃)2
grin007 [14]

Answer:

0.017mole

0.0033M

Explanation:

Given parameters:

Formula of the compound:

           Mg(ClO₃)₂

Mass of the sample  = 3.24g

Unknown:

Number of moles of the sample = ?

Molarity  = ?

Solution:

The number of moles of any substance is given as:

   Number of moles  = \frac{mass}{volume}  

 Molar mass of Mg(ClO₃)₂  = 24 + 2[35.5 + 3(16)]  = 191g/mol

    Number of moles  = \frac{3.24}{191}   = 0.017mole

Molarity is the number of moles of a solute in a solution:

    Molarity  = \frac{number of moles }{volume}  

 Volume given  = 5.08L

  Molarity  = \frac{0.017}{5.08}  = 0.0033M

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How many electrons does it take to fill the outer energy level of most atoms
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