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4 years ago

Which statement is true for every compound? THIS QUESTION IS WORTH 39 POINTS H.E.L.P

Chemistry

1 answer:

Dima020 [189]4 years ago

3 0

Answer: D.two or more elements are chemically bonded

Explanation:

Compound is a pure substance which is made from atoms of different elements chemically combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. They have different properties as compared to their constituents. Example: water $H_2O$

$2H_2O\rightarrow 2H_2+O_2$

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Copper $Cu$

Thus every compound is made up of two or more elements chemically bonded.

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The rate constant for this first‑order reaction is0.870 s−1 at 400 ∘C. A⟶products How long, in seconds, would it take for the co

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Answer:

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Explanation:

For first order reaction, the rate law expression is:

$kt = ln \frac{[A_{0}]}{[A_{t}]}$

Where

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k = rate constant = 0.870 s⁻¹

time = $[\frac{1}{k}](ln[\frac{0.830}{0.260}])$

time = $\frac{1}{0.870}(1.16) = 1.33 seconds$

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Answer:

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Explanation:

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3 years ago