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dezoksy [38]
2 years ago
5

Why the mixture of bromine and ethane is discoloured when left in the sun​

Chemistry
2 answers:
DENIUS [597]2 years ago
8 0

Answer:

In the presence of UV light, ethane will react with bromine in a substitution reaction. UV light is the condition under which the reaction will occur so it is written above the arrow in the chemical equation. As the reaction proceeds, the intensity of the re-brown colour of the bromine water decreases.

Anettt [7]2 years ago
8 0

Answer:

here ya go

Explanation:

combining bromine and ethane leads to a brown gas or liquid which is made of the elements. it is a gas at room temperature and does not affect human beings. there are many uses for bromine compounds but they are mainly used for the manufacturing of chlorine, fire retadants, water purification, graphy chemicals and pharmaceutcals. it is a naturally occurring element that can be found in animals such as sharks since they produce their own.

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A decomposition reaction has a half life of 578 years. (a) What is the rate constant for this reaction? (b) How many years does
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Answer:

0.001199 year^{-1} is the rate constant for this reaction.

It will take 1.73\times 10^3 years to concentration to reach 12.5% of its original value.

Explanation:

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k=\frac{0.693}{t_{1/2}}

k=\frac{0.693}{578 years}=0.001199 year^{-1}

0.001199 year^{-1} is the rate constant for this reaction.

Initial concentration of reactant =[A_o] =  x

Final concentration of reactant after time t =[A] =  12.5% of x = 0.125x

The integrated law of first order reaction :

[A]=[A_o]\times e^{-kt}

0.125x=x\times e^{-0.001199 year^{-1}\times t}

t = 1,734.31 years =1.73\times 10^3 years

It will take 1.73\times 10^3 years to concentration to reach 12.5% of its original value.

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