Question

A sample of Helium has a mass of 12g. What is the mass
of the same number of Oxygen atoms as Helium atoms
present in given sample ?​

Answer 1

Answer:

48 grams

Explanation:

Helium is a diatomic species, if one atom we’ll have atomic weight as 4g , then two will have weight 8g.

In question Helium

12/8 * Avogadro Constant = 3/2 Avogadro Constant

Weight of oxygen = 32(diatomic)

Oxygen and helium has same weight so ,

=>3/2* Avogadro Constant = X/32 * Avogadro Constant

=> 3/2 = X/32

=> X = 48

=> Hence 48g of oxygen will be present in the given compound.