Questions: 35) Sterling silver contains 925 parts silver and 75 parts copper by mass. What is the percent copper in sterling silver in the sample?
A) 7.5 %
B) 8.1 %
C) 12 %
D) 93 %
E) 100 %
39) Stainless steel is an alloy of iron, chromium, nickel, and manganese metals. For a 5.00 g sample is 18.0 % chromium, what is the mass of chromium in the sample?
A) 0.04508
B) 0.0900 g
C) 0.450 g
D) 0.900 g
E) 1.808
Transcript text: 35) Sterling silver contains 925 parts silver and 75 parts copper by mass. What is the percent copper in sterling silver in the sample?
A) $7.5 \%$
B) $8.1 \%$
C) $12 \%$
D) $93 \%$
E) $100 \%$
39) Stainless steel is an alloy of iron, chromium, nickel, and manganese metals. For a 5.00 g sample is $18.0 \%$ chromium, what is the mass of chromium in the sample?
A) 0.04508
B) 0.0900 g
C) 0.450 g
D) $0.900 \mathrm{~g}$
E) 1.808
Solution
Solution Steps
Step 1: Understanding the Problem
We are given a 5.00 g sample of stainless steel that contains 18.0% chromium. We need to calculate the mass of chromium in this sample.
Step 2: Calculate the Mass of Chromium
To find the mass of chromium, we use the percentage given. The mass of chromium can be calculated using the formula:
\[
\text{Mass of Chromium} = \left(\frac{\text{Percentage of Chromium}}{100}\right) \times \text{Total Mass of Sample}
\]