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应用化学专业英语第二版万有志主编版(课后答案和课文翻译)
If the mass of a 12C atom is exactly 12 amu,then the mass of a 1H atom to five significant figures must be 1.0078 amu. 12 amu x 0.083986 = 1.0078 amu
（2）
First we calculate k and then use the first-order rate equation.
k?loglog0.693?1.21?10?4/yr5730yr?A?0kt??A?2.303?41.0001.21?10/yr?t0.4772.303?2.303??log2.09??6.1?103?6100yrt?1.21?10?4/yr
The bone was tossed away (more precisely, the animal whose bone was died) about 6100 years ago, or about 4100 B.C. We can thus be sure that a village was in existence at that place at that time.
Unit 7 The Nomenclature of Inorganic Substances
I. Comprehension
1.A 2.B 3.C 4.C 5.B
II. Give the systematic name for the following
ammonium ion ; copper(II) ion ; strontium ion; Ccopper(I) ion; iron(II) ion; zinc ion; hydrogen ion; lead((II) ion; aluminum;
silver ion; magnesium ion; chromium(III) ion; Barium ; Manganese(II) ion; iron(III) ion; calcium ion; mercury(II) ion; chromium(II) ion; tin(II) ion.
carbon monoxide; ditrogen trioxide; carbon dioxide; diphosphorus pentoxide; sulfur trioxide; dichlorine heptoxide
arsenate ion; sulfite ion; hydride ion; arsenite ion; bromide ion; hydroxide ion; phosphate ion; chlorate ion; hypochlorite ion; phosphate ion; chloride ion; iodate ion; carbonate ion; chlorite ion; nitrate ion;
chromate ion; cyanide ion; iodide ion; dichromate ion; fluoride ion; nitrate ion;
oxide