Answered

How many potassium atoms are in 250.0 grams of potassium?



1.66 x 10−24 atoms K


3.85 x 1024 atoms K


1.51 x 1026 atoms K


5.88 x 1027 atoms K

Verified Answer :

Edufirst

Use the atomic mass of potassium, k, 39.1 g/mol, and the formula n = mass / atomic-mass.

Where n is the number of moles.

n = 250.0 g / 39.1 g/mol = 6.3939 mol.

Now multiply by Avogadro number to find the number of atoms:

6.3939 mol 6.021023 atoms/mol = 38.49 10^23 atoms = 3.849 10^24.

Answer: 3.85*10^24

Answer:3.85*10^24

Explanation:

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