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xxTIMURxx [149]
3 years ago
15

When do chemical reactions occur?

Chemistry
1 answer:
Liono4ka [1.6K]3 years ago
8 0

Answer:

When the molecular composition changes.

Explanation:

A physical change is a change in size or appearance that can usually be reversed; a chemical change cannot be reversed easily and changes the atomic composition of something.

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Which statement best describes why specific heat capacity is often more useful than heat capacity for scientists when comparing
Misha Larkins [42]

The correct option is this: SPECIFIC HEAT CAPACITY IS AN INTENSIVE PROPERTY AND DOES NOT DEPEND ON SAMPLE SIZE.

Generally, all the properties of matters can be divided into two classes, these are intensive and extensive properties. Intensive properties are those properties that are not determined by the quantity of the material that is present or available. Examples of intensive properties are colour, density and specific heat capacity. For instance, whether you have a bucket of water or a cup of water, the quantity does not matter, the colour of water will always remain the same. Extensive properties in contrast, are those properties that depend on the quantity of material that is available. Examples are mass, heat capacity and volume.

6 0
4 years ago
Read 2 more answers
Which of the following chemical formulas are incorrect?
Diano4ka-milaya [45]

Answer:

The answer to your question is:

Explanation:

Which formulas are incorrect:

NaO₂       Incorrect                     Na₂O    correct

RbCl        Correct

K₂S          Correct

Al₂Cl₃      Incorrect                    AlCl₃      correct

MgP₂      Incorrect                   Mg₃P₂    correct

6 0
3 years ago
• When a mechanism has been investigated in detail, it can be understood on many levels of differing detail. • An additional det
Nataly [62]

Complete Question

The complete question is shown on the first uploaded image

Answer:

 The kinetic order in HI is x=  2

Explanation:

Generally the slow step in a reaction mechanism is the rate determining step

  Now with this knowledge at the back of our minds we can see that  the number of moles of HI i s 2 which implies that the order of HI is 2m

So we can represent the rate law as

        Rate  =  k  [CH_3 CHCH_2][HI]^2

hence

x =  2

7 0
4 years ago
The number of protons in an atom of an element always equals its atomic weight.
Viefleur [7K]
B.False
the number of protons in an atom is equal to the atomic number
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4 years ago
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Lorico [155]
"It is important to balance chemical equations because there must be an equal number of atoms on both sides of the equation to follow the Law of the Conservation of Mass"
6 0
4 years ago
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