实验室常用盐酸的质量分数为36.5%，密度为1.20g/㎝3。
⑴此浓盐酸的物质的量浓度是多少？(列式计算)
⑵配制100mL3.00mol/L的盐酸，需以上浓盐酸多少mL？(列式计算)
(1)C＝1000×1.20×36.5%÷36.5＝12.0mol/L
(2)设需浓盐酸XmL
100mL×3.00mol/L＝ 12.0mol/L×X
X＝25 mL
完形填空。(15分) Hello, everyone! My name is . I’m a boy. I’m thirteen. I’m in No.4 . I’m in Class One, Grade . I’m from America. My is brown and my mouth is . My English teacher is Li. She is . I think she is 22. Bob and Jane my friends. Bob is Cuba. is tall and black. He has black hair and big . Jane is from England. She is tall and white. She blond hair and a big nose. Bob and Jane are 12 old. They are in Grade One, , but in Class Two.
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