Đáp án:
Sai đề, xem lại khối lượng muối
Giải thích các bước giải:
nHNO3=0,24.1=0,24 mol
R2O3 + HNO3 ---> Muối + sản phẩm khác
Ta có: mR2O3 + mHNO3=6,4+0,24.63=21,52 <32,32 gam -> sai đề
nHNO3= 0,24 mol
R2O3+ 6HNO3 -> 2R(NO3)3+ 3H2O
=> nR2O3= 0,04 mol
=> M R2O3= 160 (Fe2O3)
Muối X là Fe(NO3)3
Reading is the act of getting meaning from printed or written words. It is basic to learning and one of the most (23)_____ skills in everyday life. Reading provides the key to all kinds of information. It enables us (24)_____ how to build or fix things, to enjoy stories, to discover what other people believe, and to develop ideas and beliefs of our own. In the simplest sense, reading means recognizing letters and groups of letters as symbols that stand (25)_____ particular sounds. The sounds, in turn, form words (26)_____ express ideas in written or printed form. A broader definition of reading links it more closely with other uses of language and with thinking. According to that definition, reading first depends on a reader's (27)_____ and experience to understand what is read. It then involves how well the reader remembers, uses, and reacts to the material. Câu 23: A. important. (adj) quan trọng B. importer (n) nhà nhập khẩu C. importance (n) tầm quan trọng D. importantly(adv) D. quan trọng Câu 24: A. learns B. learning C. to learn D. learnt Câu 25: A. on B. for C. in D. at Câu 26: A. what B. that C. where D. when Câu 27: A. memory B. memorably C. memorial D. memorable
11. Look! The birds ( fly ) ………………………………….……………. 12. I ( go ) ………….to school by bus every day, but today I ( go ) …………..to school by bike. 13. Listen! Mai ( sing ) …………………………. 14. They ( play ) …………………volleyball every afternoon. They ( play ) ……………………volleyball now. 15. Mai ( brush ) …………..her teeth every morning. She ( brush ) ……………………her teeth now. 16. Listen! Lan ( play ) ……………………….the piano. 17. Mai ( be ) ………………….tired now. 18. It is from 6:00 p.m. Mary is at home. She ( have ) ……………….. dinner with her family around six o'clock 19. Where is your father? He is upstairs. He ( watch ) …………………….……T.V He always ( watch ) ………………………..T.V at night. 20. Our teacher ( live ) ………………..on Quang Trung street.
người ơi dịch đoạn văn này ra tiếng anh giúp mk với ak
Mọi người ơi dịch đoạn văn này ra tiếng anh giúp mk với ak
That City has a high population...............
khi làm việc trong mạng cục bộ muốn xem tài nguyên trên mạng ta nháy đúp chuột chọn biểu tượng gì?
Question III. Put the correct verbs in the brackets. 1. Every morning, Linda ( get )……......up at 6. She ( have ) ………………………breakfast at 6:10 After breakfast, she ( brush ) ………………...her teeth. She ( go ) ……..to school at 6:30. She ( have ) ……………………………..…lunch at 11:30 at school. 2. We ( watch ) …………….T.V every morning. 3. I (do ) ……………………my homework every afternoon. 4. Mai and Lan ( play ) ………………….games after school. 5. Vy ( listen ) ………………to music every night. 6. Where ( be ) ………………..your father now? He ( read ) …………………………………..a newspaper. 7. What …….you ( do )………….…………? I ( be ) …………………….a student. 8. Where ………….you ( go ) ……………….now? I (go ) ………………………….…to the market. 9. She is cooking and we ( do ) ……………………..the housework. 10. He isn`t in the room. He ( play ) ………………………………..in the garden.
Tìm chữ số a và b biết 7a4b( có gạch ngang trên đầu) chia hết cho 4 và 7
Giúp mik vs Mik đag cần gấp ạ
Giúp mình vẽ hình bài 4 vs câu a với ạ Mơn ❤❤
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