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Question:- Is NO2 an ionic or covalent bond? Answer: NO2 (nitrogen dioxide) has covalent bonds. Nitrogen dioxide is a covalent molecular compound in which a nitrogen atom shares its position with two oxygen atoms. NO2 has a co-ordinate or polar covalent bond between its nitrogen and oxygen only because the nitrogen and oxygen share a…

Classify table salt as one of the following. a. element b. compound c. homogeneous mixture d. heterogeneous mixture e. energy f. none of the above Answer: b. compound Sodium chloride chemically referred to as table salt is a clear example of a compound. A compound is a form of matter which is made of two…

How many protons, neutrons, and electrons does silicon have? Answer: Silicon has 14 protons, 14 neutrons and has 14 electrons in its shell. It is an element on the periodic table with the atomic number 14, and it falls under the silicon family. The atomic number indicates the number of protons in the nucleus of…

The heart is _____ to the lungs. A. medial B. proximal C. lateral D. dorsal E. distal F. inferior Answer: C. lateral From an anatomical point of view, it is located on the side of the lungs, or to be more specific, on their lateral sides. This means that the heart is located somewhat in…

Which are the roles of a bank? Check all that apply. a. Storing and holding money b. Making purchases to create profits c. Lending money d. Investing in the economy e. Creating money for the economy Answer: The correct answer is a, c, d and e. Banks perform several important functions in the contemporary world…

Define biotechnology discuss biotechnology under the following subtopics: 1. Traditional biotechnology. 2. Modern biotechnology. 3. Limitations of traditional biotechnology. 4. Advantages of modern biotechnology. Answer: The application of living organisms, parts of them or products of their activity for the creation of new goods or services is called biotechnology. Here’s a brief overview of the…

Question:- How old was Neil Armstrong when he landed on the moon? Answer: Officially, Neil Armstrong was 38 years old when he became the first man to transport to the moon. Three men comprised the Apollo 11 mission; Neil Armstrong, Buzz Aldrin, and Michael Collins on the 20th of July 1969, Armstrong became the first…

Which of the following is not part of the cell theory? (a) All cells have a nucleus (b) Cells are the building blocks of life (c) All cells come from preexisting cells (d) All organisms are composed of cells. Answer: (a) All cells have a nucleus The cell theory is a key concept that forms…

Question:- Which is largest organ in the human body? Answer: Skin is known to be the largest organ in place in the human body. The skin, or also the integumentary system, is an organ in humans that provides multiple functions and is located all over the body’s surface. It extends over an area of about…

Question:- Is baking soda (𝑁𝑎𝐻𝐶𝑂3) classified as a mixture or a pure substance? Explain. Answer: Sodium bicarbonate, commonly called baking soda, is NaHCO3, which can be better understood as a pure substance. The definition of a pure substance is that it is an element or compound that contains only a designated molecule or atom. The…