A:S的燃烧热为297.23kJ/mo1
B:S(g)+O2(g)===SO2(g)放出的热量大于297.23kJ
C:S(g)+O2(g)==SO2(g)放出的热量小于297.23kJ
D:形成1mol SO2(g)的化学键所释放的总能量大于断裂1molS(s)和lmolO2(g)的化学键所吸收的总能量
用简便方法计算。
196×65+4×65=____
先配置溶质质量分数为10%的NaCl溶液50g,下列操作错误的是( )
— Did you see Anna after class?
— I saw her leave the classroom, but I didn't notice __________after that.