# Determine the mass of gold if the gold ring weighs 5 grams and the mass fraction of gold is 58.5%

October 1, 2021 | education

| In order to solve the problem, we need to create a condition.

Given:

m (rings) – 5 grams.

ω (Au) – 58.5%

Find:

m (Au) -?

Solution:

This problem can be solved knowing the formula for finding the mass fraction of a substance

ω = m1 / m х 100%, therefore, we redo the formula, where we do not know one of the masses,

m = m1 * ω / 100 = 5 * 58.5 / 100 = 2.925 grams of Au (gold in the ring).

Answer: The ring provided to us weighing 5 grams, 585 samples, pure gold contains 2.925 grams.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.