题干

人类的生活离不开化学,生活中的化学无处不在.请回答:

(1)家用铁锅用水清洗后放置一段时间,出现红棕色的锈斑.此过程中不可能发生的变化有____ (填序号).

①铁元素被氧化    ②铁元素被还原  ③铁元素由+3价转化为+2价

为防止铁锅生锈,将其洗净后,可进一步采取的措施是____ (填序号).

①擦干                    ②放在潮湿的地方

(2)抗酸药物的作用是中和胃里过多的盐酸.某抗酸药的主要成分是碳酸氢钠,写出碳酸氢钠与盐酸反应的离子方程式:____ .若此抗酸药每片含碳酸氢钠0.40g,取此药一片研碎后与足量的盐酸反应,生成气体在标准状况下的体积为____ L(精确到0.01).

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答案(点此获取答案解析)

②③,①,HCO3+H+=CO2↑+H2O,0.11

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                                                                           Ways to Free Your Mind You're Feeling Stuck

    Have you ever like you were racing around in without making much forward progress? If you're stuck and you don't know how to rise, don't look outside yourself. Look below.____

    Go back to what's important

    When we get stuck, it can be extremely useful to come back to these three things: core values, beliefs and goals. Why?____

    Ask for help

    Very often, highly happy and successful people have a supporting group of friends, family and others who help them____And don't be afraid to reach out and help someone who's even more stuck than you.

    Embrace the natural pathways

    When you get stuck, there's no need to go back to the drawing board. Ask the people around you about the systems that are working for them, read insightful books and blog articles, and use the same methods and pathways that others have used to get unstuck.____

    Relocate yourself to an inspiring environment

    ____You can go for a walk in a nearby park. You can come out of the office for a cup of coffee. Or if you are at home, you can simply go to a different room in the house. Whether it's urban spaces, parks, libraries, museums or even our own backyards, there are plenty of available sources that we can draw inspiration and strength from.

A. Goals are the outcomes in life that we strive for.

B. Here are some useful ways to help yourself get unstuck.

C. When you are stuck, don't be afraid to ask for help.

D. One way to get unstuck is to simply change your environment.

E. Because they form the basics of what is important to us as individuals.

F. Break the circle of worry and work on something else.

G. In fact, the system is nothing more than a natural pathway of thought that someone has created with their mind.