Listen and number. 听录音,给句子排列顺序。 ( )There is no food for lunch. ( ) Sure. ( )I have a magic stone. ( )What's a magic stone? ( )May we borrow your magic stone? ( )It makes food.
【单选题】已知下列反应的平衡常数: H 2 ( g ) . + S ( s. ) = H 2 S ( s ) . 1 K 1 S ( s ) + O 2 ( g ) = SO 2 ( g ) . 2 K 2 则反应 H 2 ( g. ) + SO 2 ( g ) = O 2 ( g ) + H 2 S ( g ) 的平衡常数为: