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matrenka [14]
3 years ago
10

The flamability (burns) is a physical change ?

Chemistry
2 answers:
kaheart [24]3 years ago
7 0
Nah not much of a physical change
NikAS [45]3 years ago
5 0

Flammability is a chemical change because when you burn something, it no longer has the same properties.

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break down food into smaller molecules the body can use; absorb molecules into blood and carry them throughout the body; eliminate wastes from the body

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When solid ammonium chloride dissociates at a certain temperature in a 0.500 dm3 container, ammonia and hydrogen chloride are fo
SIZIF [17.4K]
1) Reaction

<span>NH4Cl(s) ---> NH3(g) + HCl(g)


2) equilibrium equation, Kc


Kc = [NH3] * [HCl]


3) Table of equilibrium formation



step               concentrations
                       </span>
<span>                            NH4Cl(s)                     NH3(g)             HCl(g)


start                      1.000 mole                     0                    0


react                        - x


produce                                                       +x                  + x
                         ------------------                ----------              -----------

end                         1 - x                             +x                    +x
            

1 - x = 0.3 => x = 1 - 0.3 = 0.7


[NH3] = [HCl] = 0.7/0.5 liter = 1.4                (I used 0.500 dm^3 = 0.5 liter)


4) Equilibrium equation:


Kc = [NH3] [HCl] = (1.4)^2  = 1.96


Which is the number that you were looking for.


Answer: Kc = 1.96
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3 years ago
Which is the best example of how electromagnetic energy is used in everyday life
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Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

The best example of how electromagnetic energy is used in everyday life is <span>a patient receiving an X-ray in a hospital</span>
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he never had evidence in the first place that was nearly enough.

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Can someone please explain the relationship between the group number, the number of valence electrons lost or gained, and the fo
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<span>Ca has 2 valence electrons and F has 7, they would end up having to share electrons but Ca or F has to keep one because in total there are 9 valence elections and only 8 are needed to make this pair "happy". that's all i can provide. i hope it helped some</span>
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