Question

A chemist weighed out 101. g of potassium. Calculate the number of moles of potassium she weighed out.

Answer 1

 The answer is 2.58 moles potassium
The solution to this is,
to find moles, convert grams to mole by the equation
grams(mole/gram)=moles
101. g of potassium(1 mole potassium/39.10 g potassium)=2.58 moles potassium

Answer 2

Answer:

101 g of Potassium is equivalent to 2.583 moles of Potassium.

Step-by-step explanation:

As per definition of moles, molecular weight of a substance = 1 mole

So molecular weight of Potassium = 39.0983 g

∵ 39.0983 g weight of Potassium = 1 mole

∴ 1 g weight of Potassium = $\frac{1}{39.0983}$ g

∴ 101 g of Potassium = $\frac{101}{39.0983}$ g

                                  = 2.583 moles

Therefore, 101 g of Potassium is equivalent to 2.583 moles of Potassium.