a sterling silver ring has a mass of 12.0 g and contains 11.1 g of pure silver. what is percentage weight by…

Explanation:

Step1: Recall the formula

The formula for percentage weight - by - weight concentration ($w/w%$) is $w/w%=\frac{\text{mass of solute}}{\text{mass of solution}}\times100%$. Here, the solute is pure silver and the solution is the sterling - silver ring.

Step2: Identify the values

The mass of pure silver (solute) $m_{solute}=11.1\ g$ and the mass of the sterling - silver ring (solution) $m_{solution}=12.0\ g$.

Step3: Calculate the percentage

Substitute the values into the formula: $w/w%=\frac{11.1\ g}{12.0\ g}\times 100%$. $w/w%=\frac{1110}{12.0}% = 92.5%$

Answer:

$92.5%$