English for Chemists
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English-for-Chemists АНГЛИЙСКИЙ
- Bu sahifa navigatsiya:
- Exercise 2 Write the formulas for the following compounds.
- 10 Carbon Facts • Comparison of Adjectives • Organic nomenclature • Word Order Life on earth depends on
- Pure carbon
Exercises:
Exercise 1 Give the names of the following compounds: PI 3 - __________________________ P 2 O 5 - __________________________ SO 3 - __________________________ Ca(NO 3 ) 2 - __________________________ Ca(NO 2 ) 2 - __________________________ NaOH - __________________________ Ca(OH) 2 - __________________________ Exercise 2 Write the formulas for the following compounds. Nitrogen monoxide - __________________________ Dinitrogen monoxide - __________________________ Iron (II) suplhide - __________________________ Iron (III) sulphide - __________________________ 47 Unit 7 Organic Chemistry • 10 Carbon Facts • Comparison of Adjectives • Organic nomenclature • Word Order Life on earth depends on the chemical element carbon, which is present in every living thing. Carbon is so important, it forms the basis for two branches of chemistry, organic chemistry and biochemistry. 10 Carbon Facts The Chemical Basis for Life By Anne Marie Helmenstine, Ph.D., About.com 1. Read the 10 facts about carbon and match the 2 parts of each statement. 2. What is the meaning of the words in bold? 1. Carbon is the basis for organic chemistry______ 2. Carbon is a nonmetal that can bond with itself and many other chemical elements, __________ 3. Elemental carbon can take the form of one of the hardest substances (diamond) ___________ 4. Carbon is made in the interiors of stars, _____________ 5. Carbon compounds have limitless uses. In its elemental form, diamond is a gemstone and used for drilling/cutting; graphite is used in pencils, as a lubricant, and to protect against rust; ___________ 6. Carbon has the highest melting/sublimation point of the elements. The melting point of diamond is ~3550°C, _________ 7. Pure carbon exists free in nature _____________ 8. The origin of the name 'carbon' comes from the Latin word carbo, for charcoal. __________ 9. Pure carbon is considered non-toxic, ___________ 10. Carbon is the fourth most abundant element in the universe - __________ a ______ as it occurs in all living organisms. b ______or one of the softest (graphite). 48 c ______ though it was not produced in the Big Bang. d ______ and has been known since prehistoric time. e ______ forming nearly ten million compounds. f ______ hydrogen, helium, and oxygen are found in higher amounts, by mass. g ______ although inhalation of fine particles, such as soot, can damage lung tissue. h ______ The German and French words for charcoal are similar. i ______ while charcoal is used to remove toxins, tastes, and odors. j ______ with the sublimation point of carbon around 3800°C. Adapted from: http://chemistry.about.com/od/elementfacts/a/carbonfacts.htm Download 1.14 Mb. Do'stlaringiz bilan baham: |
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