How Many Moles of Electrons Weigh 1 kg?

[takando12]

Homework Statement

How many moles of electrons weigh 1 kg?

Homework Equations

The Attempt at a Solution

We know the mass of an electron= 9.1*10^-31kg. So no of electrons in one Kg will be 1/9.1*10^-31. Then we just divide that by 6* 10²³ to get the number of moles. But my teacher told me that i need to first convert the mass into grams for the calculations. Does it matter in this case since we're dealing with electrons?

 

[Borek]

As the mass of electron is already expressed in kg, there is no need to convert it and your approach is perfectly correct. However in future please don't omit units - I had to check 9.1×10^-31 is a mass of an electron expressed in kg to be sure you are right.

 

[takando12]

As the mass of electron is already expressed in kg, there is no need to convert it and your approach is perfectly correct. However in future please don't omit units - I had to check 9.1×10^-31 is a mass of an electron expressed in kg to be sure you are right.

sorry about that. And thank you sir.