#
**Problem**: Pure gold is usually too soft for jewelry, so it is often alloyed with other metals.How many gold atoms are in an 0.351-ounce, 18 K gold bracelet? (18 K gold is 75% gold by mass.)

###### FREE Expert Solution

###### FREE Expert Solution

$\overline{){\mathbf{mass}}{\mathbf{}}{\mathbf{percent}}{\mathbf{}}{\mathbf{gold}}{\mathbf{=}}\frac{\mathbf{mass}\mathbf{}\mathbf{gold}}{\mathbf{mass}\mathbf{}\mathbf{bracelet}}{\mathbf{\times}}{\mathbf{100}}}$

**Avogadro’s number = 6.022 x 10**^{23}** entities**

** ****entities = atoms, ions, molecules, particles, formula units**

**Calculate the # of atoms in 0.351-ounce 18 K gold bracelet****:**

###### Problem Details

Pure gold is usually too soft for jewelry, so it is often alloyed with other metals.

How many gold atoms are in an 0.351-ounce, 18 K gold bracelet? (18 K gold is 75% gold by mass.)

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mass Percent concept. You can view video lessons to learn Mass Percent Or if you need more Mass Percent practice, you can also practice Mass Percent practice problems .

How long does this problem take to solve?

Our expert Chemistry tutor, Jules took 2 minutes to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Mignerey's class at UMD.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in . You can also practice practice problems .