5. Sterling silver contains 95% silver. If a necklace made of sterling silver weighs 15g, what is the mass of silver dissolved in the necklace? A. 1.6g B. 6.2g C. 9.0g D. 14.25g 6. What is the percent by volume of isopropanol in a 90ml solution that contains 25mL isopropanol? A. 26.8% isopropanol B. 26.9% isopropanol C. 27.8% isopropanol D. 27.9 % isopropanol 7. What is the volume of a 20% methyl solution that contains 15mL of methyl? A. 6 mL of methyl B. 4 mL of methyl C. 5 mL of methyl D. 3mL of methyl​