Answer:
1.044 ounces
Explanation:
Given : One ounce of 14 karat gold = 0.58 ounce of pure gold.
i.e. Weight of pure gold in 1 ounce of 14 karat gold = 0.58 ounce of pure gold.
Then, Weight of pure gold in 1.8 ounces of 14 karat gold = 1.8 x (Weight of pure gold in 1 ounce of 14 karat gold)
Weight of pure gold in 1.8 ounces of 14 karat gold = 1.8 x ( 0.58) ounces of pure gold.
It implies 1.8 ounces of 14 karat gold = 1.8 x ( 0.58) ounces of pure gold.
= 1.044 ounces of pure gold.
Therefore, If a 14 karat gold necklace weighs 1.8 ounces that means it contains 1.044 ounces of pure gold.