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zzz [600]
4 years ago
5

What is a pure substance with only one atom called

Chemistry
1 answer:
Wittaler [7]4 years ago
3 0

Answer:

A monatomic element.

Step-by-step explanation:

If the substance contains one type of atom, it is an <em>element</em>.

If a molecule of the substance contains only one atom, it is a monatomic element.

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What is the ph of a buffer that consists of 0.45 m ch3cooh and 0.35 m ch3coona? ka = 1.8 × 10–5?
oee [108]
Answer is: pH of a buffer is 4.64.

ck(CH₃COOH) = 0.45 M.

cs(CH₃COONa) = 0.35 M.

Ka = 1.8·10⁻⁵.

<span>pKa = -logKa.
</span>pKa = -log(1.8·10⁻⁵) = 4.75.
<span>Henderson–Hasselbalch equation: pH = pKa + log(cs/ck).
</span>pH = 4.75 + log(0.35M/0.45M).
pH = 4.75 - 0.11.
pH = 4.64.

pH (potential of hydrogen) is a numeric scale used to specify the acidity or basicity an aqueous solution.


8 0
4 years ago
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Answer: Sorry i can't help, but good luck!

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4 0
3 years ago
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The molecule shown here can decolourise bromine water (above)
Sedaia [141]

Answer:

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3 0
3 years ago
Calculate the root mean square (rms) average speed of the atoms in a sample of xenon gas at 0.15 atm and -55c
GrogVix [38]
Answer:
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Explanation:
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Vrms = \sqrt{ \frac{3RT}{M}}
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4 years ago
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