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Anna007 [38]
3 years ago
14

1. How many moles of potassium are present in 4.23 x 1025 potassium atoms?

Chemistry
1 answer:
eduard3 years ago
5 0

Answer:

70.26 moles

Explanation:

1 mole of potassium will contain 6.02 x 10²³ atoms of potassium

6.02 x 10²³ atoms of potassium  = 1 mole

4.23 x 10²⁵ atoms of potassium = 4.23 x 10²⁵ / 6.02 x 10²³

= 70.26 moles .

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1. V2.

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3. 451K

4. 0.25 x 451 = V2 x 299

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1. The data obtained from the question include:

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Initial temperature (T1) = 26°C

Final temperature (T2) = 178°C

Final volume (V2) =.?

2. Conversion from celsius to Kelvin temperature.

T(K) = T (°C) + 273

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3. Conversion from celsius to Kelvin temperature.

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4. Initial volume (V1) = 0.25mL

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