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anh916982
2 năm trước
để pha 1l dd NaOh 4M từ dd NaOH 2M và NaOH rắn. cần lấy bao nhiêu mol NaOH rắn và bao nhiêu thể tích dung dịch NaOH 2M. biết rằng cứ 1mol NaOH rắn khi tan vào nước làm thể tích tăng 0,01l HELPPPPPPPPPPPP MEEEEEE!!!~~~~~~~
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Exercise 1: Reorder the following words to make correct sentences. 1. Robot vacuum cleaners a. cleaning/ easier/ vacuuming/ Floor/ are/ and/ Deebot./ with . b. cleaning/ Second,/ it/ different/ has/ for/ types/ all/ oil flooring./ modes . c. automatically/ its/ Finally,/ it/ empty/ dust/ bin./ can . d. technology/ First,/ it/ has/ to/ navigate/ and/ obstacles./ detect . e. Besides,/ pre-set/ can/ be/ to/ are/ clean/ the/ also/ floors/ you/ not/ it/ at home./ while . 2. Clocky robotic alarm a. not/ you/ do/ sleepy/ fed/ anymore./ Therefore . b. you/ normal alarm docks/ which/ can/ turn off/ Unlike/ easily,/ can/ Clocky/ you/ to run around/ you/ before/ turn it off./ requires/ your room . . c. is/ type/ a/ of/ alarm/ clock./ Clocky/ smart . d. hides/ It/ runs/ and/ get off/ continuing/ while/ to/ until/ you/ your/ bed/ away/ beep . Exercise 2: Write a paragraph basing on available information, beginning as follows: 1. Smart faucet - Feature: save water (15,000 gallons per unit per year) with its innovative technology - Save energy with its intelligent design - Hygienic as you do not need to touch the valve - Inexpensive - Suitable for children, the elderly, and the disabled Smart faucet is an intelligent device. 2 . Dryer ball - Purpose: to make clothes drier - Features: save 25% of time for drying - A natural way to soften the clothes without using any chemicals - Safe to use with all types of material - Environmental friendly as it is made from recycled plastic Dryer ball is a new technology for clothes drying ___________________________________ ________________________________________________________________________________________ ___________________________________________________________________________________________ Exercise 3: Read and do the following tasks. What will the houses of the future look like? In 50,100, 1000 years time? Let’s look at some additions we might be seeing soon. I. Redecorating becomes a touch of a button in the house of the future. Download your (1) _______________ or patterns for a change of scenery, or simply use the walls of your house as a giant cinema – 3D of course! II. We want things to be easier and quicker – what better way than to have a clever house that takes care of itself? (2) _______________ already exists (it uses (3) _______________ to breakdown the dirt and rain washes it all away) so the next step will be a smart room that recognises the level of dirt/dust and shuts the door for a total spray down while you’re out at work. III. Yes, we know that intelligent robot probably made us think about having a robot serving us at all times. The robots will basically be the (4) _______________ of the future – taking our kids to school ordering in and cooking our food and (5) _______________. It is great. a. Put the headlines to suitable paragraph. - Home Robots - Digital Wallpaper - Self-Cleaning Kitchens and Bathrooms b. Complete the blanks from 1 to 5 with these words/ phrases. - self-cleaning glass - favourite colours - UV light - housekeepers

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