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• Phân tử khối của CuO là

Câu 1:

Phân tử khối của CuO là

A.

16 đvC

B.

64 đvC

C.

80 đvC

Feedback Phân tử khối của CuO là 80 đvCD.

86 đvC

Những câu hỏi này đến từ bài kiểm tra này. Bạn có muốn thực hiện bài kiểm tra thử không?

Trắc nghiệm Hóa học lớp 8 - Chất - Nguyên tử - Phân tử - Đề số 2

• 20 phút
• 10 câu hỏi

Làm bài kiểm tra

Một số câu hỏi từ cùng một bài kiểm tra

• Trong các chất dưới đây có mấy đơn chất: Cu, FeO, , CaO, Na, Ba, ZnO, CO, Mg.

• Oxit là

• Những nguyên tố tạo nên Canxi cacbonat có trong vỏ trứng là:

• Hạt nhân nguyên tử cấu tạo bởi:

• Hạt nhân nguyên tử cấu tạo bởi:

• Phân tử khối của CuO là

• Hợp chất $(NH_{2})_{x}CO$ có phân tử khối là 60 đvC. Giá trị của x là

• Trong công thức hóa học CuO, Cu có hóa trị bằng bao nhiêu

• Nguyên tố nào có nguyên tử khối là 32 đvC?

• Khi làm thí nghiệm, dùng kẹp để cặp ống nghiệm, người ta thường kẹp ở vị trí nào trên thân ống nghiệm?

Một số câu hỏi khác bạn có thể quan tâm

• Ngâm một thanh kim loại M hóa trị II trong 200 ml dung dịch Cu(NO3)2 0,4M đến khi dung dịch hết màu xanh. Biết rằng toàn bộ Cu sinh ra đều bám hết lên thanh M, khối lượng thanh M tăng 0,64 gam. Nguyên tử khối của M là:

• The murderer was_______to a lifetime imprisonment.

• Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.

  One of the most interesting authors of the twentieth century, J.R.R Tolkien, achieved fame through his highly inventive trilogy. The Lord of the Rings. Born in 1892, Tolkien received his education from Oxford and then served in World War I. After the war, he became a professor of Anglo -Saxon and English language and literature at Oxford University.

            Although published in 1965, the three books that comprise the Lord of the Rings were written in intervals from 1936 to 1949. This was mainly due to Tolkien's responsibilities as a professor and the outbreak of World War II. By the late 1960s, this fascinating trilogy had become a sociological phenomenon as young people intently studied the mythology and legends created by Tolkien.

            The trilogy is remarkable not only for its highly developed account of historical fiction but also its success as a modern heroic epic. The main plot describes the struggle between good and evil kingdom as they try to acquire a magic ring that has the power to rule the world. The novels, which are set in a time called Middle Earth, describe a detailed fantasy world. Established before humans populated the Earth, Middle Earth was inhabited by good and evil creatures such as hobbits, elves, monsters, wizards, and some humans. The characters and the setting of Middle Earth were modeled after mythological stories from Greece and Northern Europe.

            Although readers have scrutinized the texts for inner meaning and have tried to connect the trilogy with Tolkien's real life experiences in England during World War II, he denied the connection. He claims that the story began in his years as an undergraduate student and grew out of his desire to create mythology and legends about elves and their language.

            Tolkien was a masterful fantasy novelist who used his extensive knowledge of folklore to create a body of work that is still read and enjoyed throughout the world today.

  What can we assume is NOT true about Middle Earth

• Đối với HĐLĐ có thời hạn dưới 3 tháng thì không bắt buộc phải giao kết bàng hình thức văn bản

• Tại nơi có gia tốc trọng trường g = 9,8 m/s2, một con lắc đơn dao động điều hòa với chu kì T=2π7s. Chiều dài của con lắc đơn đó bằng

• Read the following passage and write the letter A, B, C or D on the top of the first page to indicate the correct answer to each of the questions.

  The incredible growth of the Internet over recent years has caused problems for parents and teachers. Parents worry about which sites their children spend time on, who they chat to online and the possible effects that computer games might have on them. For teachers, meanwhile, the main worry is the way the Internet makes cheating easier!

  Schools and universities say there has been a huge increase in plagiarism – taking other people‟s words and ideas and pretending that they are your own. In the past, anyone who wanted to copy had to go to a library, find the right books, read through them, find the sections they needed and then physically write down the words they wanted to use. Nowadays, though, students can simply copy extracts from websites- while really desperate students sometimes copy whole essays! As if this wasn‟t bad enough, sites offering to actually do homework – at a price – have also started appearing.

  Despite all this, we shouldn‟t assume that the Internet only brings problems. Indeed, you could say that for every problem the Internet creates, it also brings a solution. Parents can now use sophisticated controls to stop kids accessing sites that might do them harm, while new software helps teachers to detect copied work immediately. Many, of course, are already able to recognize when someone is cheating! „Some students suddenly start using words they can‟t possibly understand like „dialectical antagonism‟,‟ explains one teacher, „or parts of their essays feel different.”

  One of the hardest things for teachers today is deciding how to mix modern technology with traditional study skills – and how best to use the Web in class. As more and more schools install computers in every classroom, the role of the teacher is changing. Making sure students don‟t just copy things and do learn how to quote copied work properly is part of their job, but so is designing suitable projects to fully exploit the Web in helping students students learn about subjects and develop their life and social skills.

  ( adapted from Pre- Intermidiate Outcomes by Hugh Dellar $ Andrew Walkley)

  According to the passage, which of the following statements is NOT true?