Answer : The moles of potassium is \(1.02\times 10^{-3}mol\)
Explanation : Given,
Mass of potassium = 40 mg = 0.04 g
conversion used : 1 mg = 0.001 g
Molar mass of potassium = 39 g/mol
Now we have to calculate the moles of potassium.
Formula used :
\(\text{Moles of potassium}=\frac{\text{Mass of potassium}}{\text{Molar mass of potassium}}\)
Now put all the given values in this formula, we get:
\(\text{Moles of potassium}=\frac{0.04g}{39g/mol}=1.02\times 10^{-3}mol\)
Therefore, the moles of potassium is \(1.02\times 10^{-3}mol\)
