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3 years ago

Which of the following symbolic representations of matter signifies a mixture of elements?

Chemistry

1 answer:

andreev551 [17]3 years ago

7 0

D only..

A is pure compound
B is mixture of compound and element
C is mixture of compounds
D is mixture of elements

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3 years ago

At 25∘C, the decomposition of dinitrogen pentoxide, N2O5(g), into NO2(g) and O2(g) follows first-order kinetics with k=3.4×10−5

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Answer:

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Explanation:

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For a first order reaction the rate of reaction just depends on the concentration of one specie [B] and it’s expressed as:

$-\frac{d[B]}{dt}=k[B] - - - -\frac{d[B]}{[B]}=k*dt$

If we have an ideal gas in an isothermal (T=constant) and isocoric (v=constant) process.

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Integrating we get:

$\int\limits^p \,-\frac{d[P(N_{2}O_{5})]}{P(N_{2}O_{5})}=\int\limits^ t k*dt$

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Clearing for t2:

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3 years ago

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