Câu 1. Cho 50 ml dung dịch chứa Ba(OH)2 0,04M vào 50 ml dung dịch chứa KOH 0,12M. Sau khi trộn thu được dung dịch có pH là: GIÚP EM ĐI PLEASE

Các câu hỏi liên quan

I/ Choose the word whose underlined part is pronounced differently from the other three in the following questions 1. A. looked B. watched C. carried D. stopped 2. A. study B. success C. surprise D. sugar 3. A. unite B. underline C. university D. uniform 4. A. danger B. angry C. language D. passage 5. A. character B. children C. teacher D. change II/ Choose the best answer to fill in the blank 1. Are you interested...........playing badminton after class? A. in B. with C. on D. for 2. " What.........going to Hanoi tomorrow? " A. to B. in C. about D. for 3. Hoa works very..........so she always gets good marks. A. badly B. good C. hardly D. hard 4. The building was built .........1962 and 1969. A. between B. from C. since D. for 5. This school..........in 1997 A. built B. is built C. was built D. has built 6. Of all my friends, Hoa is............. A. the tallest B. the most tallest C. taller D. more taller 7. Would you mind if I……………a photo ? A. take B. took C. would take D. am going to take 8. Last week I ……………my children to the biggest zoo in town. A. got B. brought C. fetch D. took 9. Are you proud…………….your country and its tradition ? A. about B. on C. of D. for 10. Do you collect stamps or other things ? - Yes, I am a stamp…………. A. collecting B. collector C. collect D. collection 11. It is very dangerous ………….. in the polluted environment. A. to live B. lives C. living D. live 12. Our ………….. resources are limited so we should recycle all used things. A. nature B. natural C. naturing D. naturally 13. His car is the same color …………. my uncle’s. A. alike B. as C. like D. to 14. This ruler …………….. of plastic. A. make B. made C. is making D. is made 15. I take part ………….. most youth activities of my school. A. in B. of C. on D. at