The percentage of copper in high copper alloy is______________?
Correct answer: C. 13-30%
- A. 10-12%
- B. 0-6%
- C. 13-30%
- D. 20-30%
Explanation
High-copper amalgam contains approximately 12% to 30% copper, with the usual classification threshold being more than 6% copper. Among the options, 13% to 30% is the intended range.
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