cho 24 g Mg tac dung vua du voi dd HCl co nong do 7,3%. Sau khi phan ung xay ra hoan toan, hay tinh
a, The tich khi thoat ra (DKTC)
b,Tinh khoi luong dd HCl da phan ung
Cho 29,3 gam hon hop A gom K va BaO tac dung hoan toan voi nuoc thi thu duoc 4,48 lit khi H2 o dktc
a,tinh thanh phan phan tram theo khoi luong cua moi chat trong hon hop A
b,tinh khoi luong bazo thu duoc
Tinh khoi luong cua hon hop gom
a. 0.5 mol O2 va 1.5 phan tu CO2
b.4.48 lit khi cacbonic va 33.6 lit khi hidro (cac the tich khi do o dieu kien tieu chuan)
cho cac oxit: no2, pbo,al2o3,fe3o4. oxit co phan tram khoi luong oxi nhieu hon ca la :
A .no2. B .pbo. c.al2o3. D. fe3o4
hydro a la chat long co ti khoi hoi so voi khong khi bang 27 dot chay a thu duoc co2 va h2o theo ti le khoi luong 4,9:1 tim ct cua A
cho 6,5g ke tac dung voi 7,3g axit clohdric . phan ung ket thuc thu dc muoi kem clorua va khi hidro theo ti le khoi luong la 68:1 . khoi luong cua muoi kem clorua va khi hidro lan luot la :
cho 9,2g Na tac dung voi 1,6g khi O2 thu duoc natri oxit (Na2O) xac dinh cac chat sau phan ung (biet H=1;O=16;Cl=35,5;Mg=24;S=32
cho 9,2g Na tac dung voi 1,6g khi O2 thu duoc natri oxit (Na2O) xac dinh cac chat sau phan ung (biet H=1;O=16;Cl=35,5;Mg=24;S=32
Khi nung m kg da voi ( co 80% ve khoi luong la CACO3 ) thu dc 44kg cacbonic va 56kg CaO . Gia tri m la;
cho 6 5 gam kem tac dung vua du voi dung dich hydrochloric acid HCL thi thu duoc dung dich zinc chloride ZnCl2 va khi hydrogen thoat ra A viet PTHH B tinh khoi luong hydrochloric acid HCL tham gia phan ung C tinh khoi luong zinc chloride ZnCl2 tao thanh D tinh the tich khi hydrogen thoat ra o dieu kien chuan 25 do C 1 bar
Cho Zn=65 H=1 Cl= 35.5