已知298K时,2SO2(g)+O2(g)═2SO3(g)△H=﹣197KJ/mol.在相同的温度和压强下,向密闭容器中通入2molSO2和1molO2,达到平衡时放出热量Q1,向另一个体积相
Mother was greatly _____ at the news that her son was found by the police. A.relieved B.relaxed C.satisfying
根据以上信息,选择最佳答案。 51. You can probably read the above information ________. A. in a dictionary B. in a science book C. in a newspaper 52. The Smiths want to rent a townh
用温度计测量烧杯中液体的温度,图2所示的几种做法中正确的是:
右图所示的工具,王帧在《农书》中说明:“其制,当选湍流之侧,架木立铀,作二卧轮;用水激下轮。……则排前直木,则排随来去,揙冶甚速,过于人力。”这
如图,△ABC中,AB=5,AC=6,BC=4,边AB的垂直平分线交AC于点D,则△BDC的周长是( )A.8B.9C.10D.11
函数中,自变量x的取值范围是( ) A、x≥-1 B、x>0 C、x≥-1且x≠0 D、x>-1且x≠0
以惰性电极电解CuSO4和FeSO4溶液,若在阳极上产生气体的的体积在标准状况下为2.24L,则阴极上析出的固体的质量为( ) A.6.4g B.12.8g