You weigh a 24K gold chain and find that it weighs 400 grams. Determine home many moles of gold atoms you have

2.03 moles of Gold

Explanation:

Gold is one of the most precious metal metal used in many applications and mainly as a jewellery. In terms of purity it is categorized in Karats. 24 Karat is considered the purest Gold (i. e. 100 % Gold) while other Karats (14, 18, 22 e. t. c) are alloys with other metals and gyms.

Data Given:

Mass of Gold = 400 g

A. Mass of Gold = 196.97 g. mol⁻¹

Calculate Moles of Gold as,

Moles = Mass : M. Mass

Putting values,

Moles = 400 g : 196.97 g. mol⁻¹

Moles = 2.03 moles of Gold