The mass of one Avogadro number of helium atoms is?
- 1.00gram
-
4.00gram
- 8.00gram
- 6.00gram
The correct answer is: B
Explanation
Avogadro's number is an absolute number: there are 6.022×10\(^23\) elementary entities in 1 mole.
helium has a molar mass of 4.0 grams per mole. So one mole of helium has a mass of 4.0 grams.
There is an explanation video available .