____个     ____个

____个     ____个

句型转换
____ She often does her homework at night. (变为否定句)
She                              her homework at night.
____ We are cleaning our classroom now. (对划线部分提问)
                  you          now?
____ He likes pandas because they are very cute. (对划线部分提问)
                he        pandas?
____ I think he is in the classroom.（改为否定句）
I        think he        in the classroom.
____ Mr Black is a doctor.（对划线部分提问）
                Mr Black         ?

取氯酸钾和二氧化锰的混合物13g，加热至混合物固体质量不再减少为止，冷却后称得剩余固体质量为8.2g，将剩余固体加入一定量的水中，充分搅拌后过滤，滤液是10%的氯化钾溶液（假设溶液无损失），计算：

①生成氧气的质量；

②参加反应的氯酸钾的质量；（写出计算过程）。