向恒温恒容的密闭容器中充入amolX和bmolY,发生反应X(g)+3Y(g)2Z(g)达到平衡时,测得X和Y的转化率分别为25%和37.5%。则a:b为( ) A.1 3 B.3 1 C.3 2 D.1 2 答案:【答案】D 【解析】X(g)+3Y(g)2Z(g) 起始量(mol) a b 0 起始量(mol) x 3x 2x 起始量(mol) a-x b-3x 2x 由题意知: : =25% :37.5% 解之得:a:b=1:2_______2012 warm weather fashion season is all about _______ nature and flowers with a focus on rainforest.A.A; 不填B.不填; theC.The; aD.The; 不填