A 0411 G Sample of Powdered Copper Mixed with an Inert

question 23

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%

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Definitions:

Superior

Describing a position above or higher relative to something else in the body or an object.

Inferior

A term used to describe a position below or lower than another part of the body in anatomical terms.

Arteries

Blood vessels that carry oxygenated blood away from the heart to the body's tissues.

Aortic Arch

The curved portion of the aorta, the major artery coming from the heart, from which the main arteries of the head, neck, and upper limbs arise.