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3 years ago

Which of the following best describes atoms? *

Chemistry

1 answer:

Masja [62]3 years ago

6 0

a. Smallest basic units of matter

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Atom: An atom is the smallest particles of a substance which may or may not exist in free state but takes part in chemical reactions.

Molecule: A molecule is a substance which exists in free state but doesn't take part in chemical reactions.

Laws of chemical combination:-

Law of conservation of mass

Law of constant proportions

Law of multiple proportions

Law of combining volumes

Law of reciprocal proportions

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3 years ago

Which of these substances is the least acidic? solution A, pOH = 1.5 solution B, pOH = 7.0 solution C, pOH = 13.5Which of these

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3 years ago

Read 2 more answers

For the following reaction, the equilibrium constant Kc is 0.80 at a certain temperature. If the concentration of NO(g) and NOBr

velikii [3]

Answer:

[Br₂] = 1.25M

Explanation:

2NO (g) + Br₂ (g) ⇄ 2NOBr (g)

Eq 0.80M ? 0.80M

That's the situation told, in the statement.

Let's make the expression for Kc

Kc = [NOBr]² / [Br₂] . [NO]²

Kc = 0.80² / [Br₂] . [0.80]²

0.80 = 1 / [Br₂]

[Br₂] = 1 / 0.80 → 1.25

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4 years ago