3 years ago

Which is a substance that is made up of only one type of atom?

Chemistry

1 answer:

muminat3 years ago

7 0

Answer:

compound

Explanation:

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Consider the reaction below.

Law Incorporation [45]

Answer:

<u>First choice: 0.042</u>

Explanation:

Given decomposition reaction:

1PCl₅ (g) ⇄ 1PCl₃ + 1Cl₂(g)

Equilibrium constant:

$K_{eq}=\frac{[PCl_3]^1[Cl_2]^1}{[PCl_5]^1}$

Stoichiometric coefficients and powers equal to 1 are not usually shown as they are understood, but I included them in order to shwow you how they intervene in the equilibrium expressions: each concentration is raised to a power equal to the respective stoichiometric coefficient in the equilibrium equation.

So, your calculations are:

$K_{eq}=\frac{(0.020M)(0.020M)}{0.0095M}=0.042M$

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3 years ago

Why is it hot in summer and in the winter why is cold

grigory [225]

Answer: The sun is closer to the Earth is the summer and farther in the winter causing it to be hotter than it is colder in the summer and vise versa for the other question.

Explanation: I learned it ;)

8 0

2 years ago

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Which of the following examples includes only chemical changes that occur in

Paul [167]

I don’t think you can get it for

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3 years ago

A chocolate chip cookie can be separated by physical means, and it is not the same throughout.

yarga [219]

As a heterogeneous mixture