(1)某原电池装置示意图如图。
②Cu片上发生的电极反应为
③若该电池中两电极最初的总质量为500g,工作一段时间后,取出锌片和铜片洗净干燥后称重,总质量为498g,此时铜电极增重
(2)由
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②当消耗1.6g甲烷时,溶液增重
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③当通入4.48L(标准状况下)甲烷气体时,测得电路中转移1.1mol电子,则甲烷的利用率为
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同类型试题
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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