4. a chlorine-oxygen compound iis found to have a chlorine to oxygen mass ratio of 1.109.whitch of the following chlorine to oxygen mass ratio is possible for a different chlorine-oxygen compound?? a)1.000 b)1.214 c)2.428 d)4.437 e)5.014 是个不懂题目再问什麽的情形.... 17.when 10g samples of the following materials absorb 100J of heat, the temperarure increase undicated is observed. which material has the largest specific heat?? a)water 2K b)wood 6K c)copper 26K d)cemebt 11K e)glass 12K 21.怎样的电子转移可放出最长波长在波耳氢原子中 1.3到4 2.4到1 3.4到2. 4.1到5 5.4到3 还有23 28 43 37 39 晚一点我在打题目... --

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