Giải thích các bước giải:
nCl=2/35,5=4/71 mol
A(Cl)=4/71.6x10^23=3,38028169x10^22
Đáp án:
`n_{Cl} = 2/(35,5) = 4/71` `mol`
$\text{Nguyên tử Clorua là :}$
`4/71 . 6 × 10^(23) = 3,38 × 10^(22)`
V. Complete each sentence with a word from the box. Make any other necessary changes. let turn break get give come take set go (x2) 1. Is Peter at the party? No, but I’m sure he …………...........…….up soon. 2. My father still hasn’t really ………..........……. over the death of my mother. 3. It’s not easy to ……............ up smoking. I’ve tried to do it lots of times without being successful. 4. You can rely on her. She won’t …….............………..you down. 5. Don’t eat that sausage. I think it’s ................................off. 6. I’m sorry I’m late, but my car ……….... down on the way here, so I had to phone for a taxi. 7. When they were cleaning out the attic, they ……................…… across their grandmother’s old school books. 8. After she had finished loading the car, she ……................…….. off on her holiday. 9. Sorry, I don’t mean to interrupt you. Please ……............. on and finish what you are saying. 10. What a lovely baby! He certainly ………............……..after his father, doesn’t he? HUHU GIÚP EM VỚI *có kèm giải thích nữa ạaaa* EM CẢM ƠN
Nhanh - lời giải chi tiết - đúng = ctlhn
Exercise III . Choose the word (A,B,C or D) that best fits the blank space in the following passage Sarawut is a 13-year-old boy from a small town (1) …… Thailand . Every day, he has (2) ……… up (3) …….. 5:30 a. m to do some chores . (4) …….. the morning, he (5) ……. the chickens and ducks and collect their eggs . After that, he goes to school by bicycle . He helps his mother (6) ……….. his sister in the afternoon . He also (7) ……….. the house and does his homework . After dinner, he (8) ………… the dishes . Finally, he takes a shower and goes to bed at 9 p. m . (9)……. the weekends, he usually helps his parents (10) ……… the farm . Sarawut has (11) ……… of things to do every day 1. A. in B. at C. on D. to 2. A. wake B. to wake C. wakes D. to wakes 3. A. in B. at C. on D. to 4. A. at B. on C. in D. before 5. A. feeds B. feed C. take D. do 6. A. looks after B. feed C. look after D. cover 7. A. plays B. cleans C. does D. takes 8. A. washes B. cleans C. makes D. takes 9. A. at B. from C. on D. in 10. A. in B. on C. at D. next to 11. A. a lots B. lots C. some D. many Exercise V . Choose the word (A,B,C or D) that best fits the blank space in the following passage Nam is from the Mekong Delta in Vietnam . He helps his parents do the (1) …………… . Nam’s (2) ………. begins very early . Every morning he wakes up at 5 : 30 a. m . He helps his dad (3) ………. the vegetables and then he has to (4) ………… the chickens on the farm . At 6:15 a. m, Nam has to walk to school because his family doesn’t have a car . On Fridays, Nam helps clean the classroom . They have to finish cleaning before 7 a. m . At home, Nam helps his mom (5) ………….. after his brother . After dinner, Nam (6) …………… to wash the dishes and gets ready for bed 1. A. house B. chores C. homework D. works 2. A. daily routine B. routinely C. regularly D. ordinary 3. A. water B. watered C. waters D. watering 4. A. meal B. fed C. feed D. feed back 5. A. see B. watch C. take D. look 6. A. must B. has C. should D. had better
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Cho điểm sáng S cách gương phẳng 50cm. Cho S dịch chuyển ra xa gương theo phương vuông góc với gương một đoạn 10cm. Ảnh S’ bây giờ sẽ cách S một khoảng:
Cho P= (căn x/ căn x -1) + (3/căn x +1)- (6 nhân căn x -4/x-1) Rút gọn P mn đổi chứ 'căn' thành dấu căn là hiểu đề nha:333
Vẽ mầm nha mí pạn NL: Ai fan BP ko?
Giúp em với ạ! Nhờ các anh chị giải thích rõ giúp em để em hiểu nhé! Em cảm ơn nhiều!!
Tìm cặp số x,y thoả mãn : | x - 1,38 | + | 2y+ 4,2| = 0
giúp em vs ko cần chi tiết lắm đou
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