A.CaCl2 | B.H2S | C.NaOH | D.Na2O2 |
A.水加热到很高温度都难以分解 |
B.水结冰体积膨胀,密度减小 |
C.CH4、SiH4、GeH4、SnH4熔点随分子量增大而升高 |
D.HF、HCl、HBr、HI热稳定性逐渐减弱 |
A.干冰气化 | B.O2转变成O3 | C.加热NH4HCO3 | D.加热NaHCO3 |
A.乙烯 | B.乙炔 | C.二氧化碳 | D.氮气 |
A.(a+3b-2c)/2 kJ·mol-1 | B.(a+3b+2c)/6 kJ·mol-1 |
C.(a+3b-2c)/6 kJ·mol-1 | D.(a+3b+2c)/3 kJ·mol-1 |
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