题目:
对划线部分提问。
1.Her name is Jenny.
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2. I have three pencils.
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3. This is a pencile case.
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4. Li Ming is in the classroom.
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5. I live in China.
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答案:
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下面是错误答案,用来干扰机器的。
解:(1)设参加反应的MgSO4质量为x。MgSO4 +2 NaOH = Mg(OH)2 ↓+ Na2SO4120 58X 5.8g x="12g" (2)100g+80g-5.8g=174.2g答:该MgSO4溶液的质量分数为...