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试题答案

本文从以下几个角度介绍。

    1、2024全国二卷化学35题
    2、二零二零年高考化学试卷
    3、20年高考化学真题
    4、2024高考化学2卷解析
    5、2024高考2卷化学
    6、2024年全国卷二化学高考试卷及其答案解析
    7、2024全国高考化学二卷答案和解析
    8、2024年高考二卷化学试卷
    9、2024高考二卷化学答案
    10、2024年化学高考二卷

6、高三2025届高考预测压轴卷·(一)1政治试题


4、高三2025届高考预测压轴卷·(一)1化学试题


No one wants to fall ill, neither to have a cough nor to have a sore throat, which are common but really make people feel bad. In recent years, besides physical illness, mental (心理) health problems have been more and more serious among teenagers. Sarah Park, a senior high student from America, has her special way to do with the problems.
Park has known about the influence of music on the brain for long. She has been playing the violin since she was four. She deeply understands how good music is for people. Now, Lifestance, an American mental treatment technology company, is working with Park to make a new device, Spark Care+.
Spark Care+ is a smart wristband (手环) with sensors that can record mental health data, such as heart rate and blood pressure. The AI system analyzes the data and plays the right music to cheer users up. Researchers from Lifestance show that music can excite the brain’s reward system, so our brains will give out dopamine (多巴胺) and create happy feelings. What’s more, water drinking and the records of sleeping time are also important elements of checking one’s mental health. Spark Care+ sends daily report to show the latest state of health.
Besides being one of the designers for the smart wristband, Park is also a prize-winning violinist. In the future, she hopes to be a creator in the part of medical technology. She gave a piece of advice to other teenagers, “Dream big, stay active and energetic, anything will be possible.”
26．What can we know from paragraph one
A．Having a cough is strange.
B．Teenagers often fall ill.


②make a study plan制作学习计划


4、高三2025届高考预测压轴卷·(一)1化学试题


2、高三2025届高考预测压轴卷·(一)1地理试题


5、高三2025届高考预测压轴卷·(一)1历史试题


5、高三2025届高考预测压轴卷·(一)1生物学试题


6、高三2025届高考预测压轴卷·(一)1地理试题


4、高三2025届高考预测压轴卷·(一)1生物试题


B. 铁酸镍中镍(Ni)元素的化合价为+2
C. 铁酸镍中Fe与O元素的质量比为1∶2
D. 铁酸镍中Ni元素的质量分数最高
4. a、b、c三种物质的溶解度曲线如图所示。下列分析正确的是
A. t1℃时，a、c两种物质的溶液中溶质的质量分数相等
B. 将t2℃时，a、b、c三种物质的饱和溶液降温至t1℃，所得溶液的溶质质量分数的大小关系是：b>c=a
C. t2℃时，将150ga的饱和溶液降温至t1℃，析出固体的质量为30g


(2)滤渣Ⅱ的主要成分为FePO4，在高温条件下，Li2CO3、葡萄糖(C6H12O6)和FePO4可制备电极材料LiFePO4，同时生成CO和H2O，该反应的化学方程式为________________________。
【答案】(1)6HCO＋2Ce3＋＋(n－3)H2O===Ce2(CO3)3·nH2O＋3CO2↑
(2)6FePO4＋3Li2CO3＋C6H12O69CO↑＋6H2O↑＋6LiFePO4
【解析】(1)用碳酸氢铵“沉铈”，则结合原子守恒、电荷守恒可知，生成Ce2(CO3)3·nH2O的离子方程式为6HCO＋2Ce3＋＋(n－3)H2O===Ce2(CO3)3·nH2O＋3CO2↑。
(2)由在高温条件下，Li2CO3、葡萄糖(C6H12O6)和FePO4可制备电极材料LiFePO4，同时生成CO和H2O可知，该反应中Fe价态降低，C价态部分降低、部分升高，结合得失电子守恒、原子守恒可知该反应的化学方程式为6FePO4＋3Li2CO3＋C6H12O69CO↑＋6H2O↑＋6LiFePO4。
17．氯化亚铜是一种应用较广的催化剂，易水解，微溶于水，不溶于乙醇。以低品位铜矿砂(主要成分)为原料制备氯化亚铜的路线如下：
(1)“酸溶1”步骤中发生反应的化学方程式为_______。


3、高三2025届高考预测压轴卷·(一)1生物答案