A 0411 G Sample of Powdered Copper Mixed with an Inert,soluble

question 103

Multiple Choice

A 0.411 g sample of powdered copper mixed with an inert,soluble additive was fully consumed by 23.4 mL of 0.602 M nitric acid,producing copper(II) nitrate,water,and nitric oxide (NO) gas.What was the percent copper (by mass) in the sample?
3 Cu + 8 HNO₃ → 3 Cu(NO₃) ₂ + 2 NO + 4 H₂O

• A)81.7%
• B)68.3%
• C)65.3%
• D)56.9%
• E)34.4%

---

Definitions:

Judge Learned Hand

An influential American judge and judicial philosopher, renowned for his prolific rulings and essays on constitutional law and civil liberties.

Largest Merger

A significant corporate action where two or more companies combine into one entity, often to expand market share and resources.

Banking and Finance

The sector of the economy concerned with managing money, credit, and other financial instruments.

Cartels

Formal agreements among competing firms in the same industry to control prices, production, and market shares, typically to maximize joint profits.