2022-dtm_kimyo

[image: st,small,507x507-pad,600x600,f8f8f8]2022 [image: ] 20 ta variant 39 1-variant (8001641) №1 120 g suvda 80 g so3 eritildi. olingan eritmadagi kislotaning massa ulushini (%) toping. m(h2so4= 98) a) 40 b) 49 c) 50 d) 98 №2 feso4 alcl3 suv tuzlar suvda to‘la dissotsiatsialanganda eritmada 5 mol kation va 9 mol anion bo‘lsa, kationlarni to‘la cho‘ktirish uchun necha mol koh sarf bo‘ladi? a) 12 b) 10 c) 15 d) 8 №3 0,5 mol alkenni to‘la yonishidan hosil bo‘lgan co2 gazi , 400 g 20% li naoh eritmasini neytrallashga yetarli bo‘lsa, alken molekulasidagi atomlar sonini toping. a) 12 b) 9 c) 6 d) 15 №4 uglevodorodning 0,2 mol miqdori: −0,4 mol br2 ni biriktiradi; − yonishidan 0,8 mol h2o hosil bo‘ladi. uglevodorodning …

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