... mol mMgCl2 = 95 0,02 = 1,9 gam Khối lượng chất rắn = 1,66 + 19 = 3,56 gam Theo đề lượng chất rắn 3,34 gam Vậy giả thi t có Mg tham gia phản ứng không số mol b < 0,02 Các phản ứng thí nghiệm 2: ... 0,3 65 = 19,5 gam 4,8 19,5 %Mg = 24,3 100 = 19,75% %Zn = 24,3 100 = 80,25% Câu 6: a) Theo giả thi t số mol H2 = số mol CnH2n lúc ban đầu Gọi a số mol H2, CnH2n lúc ban đầu → CnH2n + H2 CnH2n
Ngày tải lên: 10/06/2015, 00:00
đề thi tỉnh Tiền Giang
... : ( 1,5 điểm ) a Hoàn thành sơ đồ phản ứng sau : b Từ chất : , nước cất , điều kiện xúc tác cần thi t coi có đủ Hãy viết phương trình hóa học điều chế sắt kim loại Câu : ( 1,5 điểm ) a.Từ chất
Ngày tải lên: 19/08/2013, 21:10
thi chuyen Tien Giang
... 2:………………………… UBND TỈNH TIỀN GIANG Sở Giáo Dục Đào Tạo Đề thức CỘNG HÒA XÃ HỘI CHỦ NGHĨA VIỆT NAM Độc lập - Tự - Hạnh phúc HƯỚNG DẪN CHẤM ĐỀ THI TUYỂN SINH VÀO LỚP 10 Môn thi : TIẾNG ANH Chuyên Khoá ... They couldn’t catch any fish this morning We have run out of gas Our refrigerator is full of food B a He took part in every activity held by the school b Others think the situation is wor...
Ngày tải lên: 08/09/2013, 11:10
Đề thi HSG 9_Tiền Giang
... or when someone is suddenly taken ill, the first thing one thinks of is, “ Where is the nearest telephone?” so that help can be summoned AV9 – HSG. T 2007 - 2008 The doctor then proceeds to examine ... workers’ families B did everything to break the strike C asked the police to protect the workers’ pickets around the mills D approved with the workers’ demands AV9 – HSG. T 2007 - 2008 The...
Ngày tải lên: 28/09/2013, 11:10
De thi HSG Bac Giang - De du bi 2010
... children’s (1 graduate) ceremony in the village school when one of the worst tornadoes in American history (2 sudden) struck A sudden loud (3 whistle) sound made everyone ... the officer Paul Deshler “There’s nothing at all here now It looks worse than a war zone.” Part IV Fill in the blank with one preposition 1.2 Colleges responded swiftly _ the demand _ ... carefully then answer the questi...
Ngày tải lên: 22/10/2013, 15:11
Dap an de thi HSG Bac Giang - chinh thuc
... each correct answer including finding and correcting the mistakes) for use -> to use way -> ways surely -> sure turn of -> turn off in a long time -> for a long time washing your teeth -> brushing ... lesson plan It was not until he came into the room that I recognized him I must send Jane and Alice my thanks/ a thank-you note for their presents - He came down with a col...
Ngày tải lên: 29/10/2013, 00:11
De thi HSG Bac Giang - De Du Bi
... children’s (1 graduate) ceremony in the village school when one of the worst tornadoes in American history (2 sudden) struck A sudden loud (3 whistle) sound made everyone ... the officer Paul Deshler “There’s nothing at all here now It looks worse than a war zone.” Part IV Fill in the blank with one preposition 1.2 Colleges responded swiftly _ the demand _ ... carefully then answer the questi...
Ngày tải lên: 29/10/2013, 00:11
De thi HSG Bac Giang 09/10- de Chinh thuc
... 28 _, the people who come to this club are in their twenties and thirties A By and large B Altogether C To a degree D Virtually 29 They asked me _ your work on the ... your current employment into a broader field This job will be studied very carefully when you send your letter of ( 65) _ for your next job It (66) _ show evidence of serious career planning ... party 95 After a long chase, the...
Ngày tải lên: 29/10/2013, 00:11
De thi HSG - Bac Giang - De chinh thuc
... the inside beauty People with this kind of beauty have attained inner peace They usually care about their fellow -man, and try to right the justice in this world As you know, Nelson Mandela, Princess ... better This inner beauty gives a certain radiance to their looks In short, everyone has (10) _ idea of beauty, and we need to have things, people and places of beauty in our everyday life Do...
Ngày tải lên: 08/11/2013, 02:11
de thi HSG -Tiên Thi
... đáp án THI HC SINH GII TRờng NM HC 2010-2011 Môn: SINH HC CâuI: (2điểm) a.Phân biệt cấu tạo đợc (1đ) b.-Nêu
Ngày tải lên: 11/11/2013, 04:11