how many moles are in 25.0 grams of potassium?
1 mol Potassium = 39g [Atomic Mass of K]
x mol Potassium = 25g
x = 25*1/39 = 0.641 mol
Hope that helps.
I would remove the 1 and make the answer 0.64 since there are only two significant figures in 25 and 39.
To find the number of moles in a given mass of potassium, we need to use the molar mass of potassium. The molar mass is the mass of one mole of a substance, expressed in grams. The molar mass of potassium (K) is approximately 39.1 grams/mol.
To calculate the number of moles of potassium (K) in 25.0 grams, we can use the formula:
Number of moles = Mass (g) / Molar mass (g/mol)
Substituting the values into the formula:
Number of moles = 25.0 g / 39.1 g/mol
Now, let's calculate the value:
Number of moles = 0.639 moles
Therefore, there are approximately 0.639 moles of potassium in 25.0 grams.