下图是“×××”钙片商品标签图. (1)主要成分为碳酸钙的相对分子质量为多少?每

题型:计算题

问题:

下图是“×××”钙片商品标签图.

(1)主要成分为碳酸钙的相对分子质量为多少?每片中至少含钙元素的质量为多少克?

(2)小芳同学为了测定其碳酸钙的含量标注是否属实,她取出6片片剂,研碎后放入烧杯中,加入稀盐酸,至不再产生气体为止.共用去稀盐酸40g,称量烧杯里剩余物质质量为51.7g(钙片中其它成分不与稀盐酸反应)试求:

①生成二氧化碳的质量.

②通过计算判断钙片中碳酸钙的含量标注是否属实.

(相对原子质量 Ca﹣40 C﹣12 O﹣16)

考点:化学反应方程式的计算相对分子质量物质组成元素的质量分数
题型:计算题

Dear Dongdong

I have been in Hong Kong for a whole week. I will stay here for another week.

Hong Kong is really a great place to visit. There’s so much to see and do here. And I’ve done so many wonderful things.

I’ve taken the cable car(缆车) to the Peak Galleria (山顶广场). I’ve been to Hong Kong Racing Museum. I’ve known a lot about horse racing. I’ve also visited Ladies’ Street. In the street I bought some beautiful clothes for my mother. Last night I went to a concert. Chinese traditional music has always been my favourite. This morning I went to Ocean Park and watched the dolphins perform. Dolphins are so clever. They can jump from the water to touch a ball, sway (摇摆) their bodies to music, kiss people and even do math. Mr Host is going to take me to an Italian film festival in Hong Kong Cultural Centre tomorrow. I’m so excited because I have never seen an Italian film before. But some people say they’re boring.

That’s all. Best wishes!  

小题1:Haohao hasn’t been to ______ yet.

A.the Peak Galleria

B.Hong Kong Racing Museum

C.the Italian film festival

D.the concert小题2:In ______ we can know something about horse racing.

A.Ocean Park

B.Hong Kong Racing Museum

C.Hong Kong Cultural Centre

D.Ladies’ Street小题3:Last night Haohao went to ______.

A.Ladies’ Street

B.the concert

C.the Italian film festival

D.the Peak Galleria小题4:Dolphins can’t ______.

A.ride bicycles

B.kiss people

C.do math

D.dance小题5:Which of the following is NOT TRUE?

A.Haohao has planned to stay in Hong Kong for two weeks.

B.This morning Haohao went to watch the dolphins perform.

C.Haohao likes Chinese traditional music very much.

D.Dongdong has seen an Italian film before.

题型:计算题

阅读、分析下列两个材料:

材料一:

材料二:

物质熔点/℃沸点/℃密度/溶解性
乙二醇

(C2H6O2

1981.11易溶于水和乙醇
丙三醇

(C3H8O3

17.92901.26能跟水、酒精以任意比互溶
 

回答下列问题(填序号):

A. 蒸馏法    B. 萃取法    C. “溶解、结晶、过滤”的方法   D. 分液法

①将纯碱从氯化钠和纯碱的混合物中分离出来,最好应用         

②将乙二醇和丙三醇相互分离的最佳方法是            

题型:计算题

28岁不孕妇女,痛经3年且逐渐加重。查子宫后壁有2个触痛性硬韧结节,右侧附件区扪及鸭卵大、活动不良囊性肿物,压痛不明显。

确诊后的合理治疗方法应是( )

A.囊肿剥出及病灶切除

B.左侧附件切除

C.双侧附件切除

D.子宫次全切除及双附件切除

E.子宫全切除及双附件切除

题型:计算题

依法成立的组织或者具有完全民事行为能力的自然人可以向养老机构住所地()部门申请设立养老机构。

题型:计算题

具有抗厌氧菌作用的抗生素是()

A.头孢氨苄

B.头孢他啶

C.甲硝唑

D.头孢哌酮

E.氧氟沙星

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