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geniusboy [140]
3 years ago
14

A change where compounds are formed or decomposed is a(n) physical change phase change nuclear change chemical change

Chemistry
2 answers:
dimaraw [331]3 years ago
4 0
It's a chemical change because a new compound is formed
lianna [129]3 years ago
3 0
       Physical change is a change in the shape, velocity, etc.
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0.000001 joule

Explanation:

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Assign oxidation numbers to the element in each of the following compounds. Remember an oxidation number is for one atom of the
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Answer:

a.  x = + 2

b.  x = + 3

c.  x = + 2

d.  x = + 3

Explanation:

The oxidation number is a formal charge assigned to an atom present in a molecule or formula unit or ion based on some arbitrary rules.

a.

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b.

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c. CrF₂

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3 years ago
How many moles of ammonia (nh3) would be produced if 2.5 moles of nitrogen (n2) reacted with excess hydrogen (h2)?
cluponka [151]
Firstly, a balanced equation has to be written for the production of ammonia (NH₃) from hydrogen gas (H₂) and nitrogen gas (N₂):
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Now, the mole ratio of N₂ : NH₃ is 1 : 2 based on the coefficients of the balanced equation.

If the moles of N₂ = 2.5 moles

   then the moles of NH₃ produced = 2.5 mol × 2 
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Magnesium Sulfate

Explanation:

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It’s b or d hope this helps
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