本题目来源于试卷: Physics Unit18: Electric Currents，类别为 通用国际物理
[单选题]
In an electroplating *()b*av42aline t2sq uh un6b process, it is desired to deposi-f1b qeof si14pq p 64brkw:e5t 40 mg of silver on a metal part by using a current of 2.0 A. How long must the current be allowed to run to deposit this much silver? (The siqe 5ie-bf1 61p:kbw4qpr fo4s lver ions are singly charged, and the atomic weight of silver is 108.)
A. $16 \; s$
B. $18 \; s$
C. $20 \; s$
D. $22 \; s$
参考答案: B
本题详细解析:
暂无
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