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3 years ago

How many potassium atoms are in 250.0 grams of potassium?

Chemistry

1 answer:

loris [4]3 years ago

3 0

Hi!

The correct option would be 3.85x10^(24)

To find the number of atoms in 250g of potassium, we need to first calculate the number of atoms in

1 mole of Potassium = 39g which contains 6.022x10^(23) atoms of K

<em>(Avogadro's constant value for the amount of molecules/atoms in one mole of any substance)</em>

<em>Solution</em>

So as 39g of Potassium contains 6.022x10^(23) K atoms

1g of Potassium would contain 6.022x10^(23) / 39 = 1.544 x10^(22) atoms

So 250g of Potassium would contain 1.544x10^(22) x 250 = 3.86x10^(24) atoms

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Answer:

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3. O+ ----- F-

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5. Cl- ----- C+

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7. S+ ----- Cl -

Explanation:

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2. O+ ---- Cl-

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<u>Given the following data;</u>

Initial volume, V1 = 65.8 Litres
Final temperature, T2 = 200 Kelvin
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Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

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Substituting the values into the formula, we have;

$T_{1} = \frac {65.8 * 200}{132.4}$

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