Bảo toàn khối lượng: \(m_{Zn}+m_{HCl}=m_{ZnCl_2}+m_{H_2}\\ \Rightarrow m_{ZnCl_2}+m_{H_2}=6,5+7,3=13,8\left(1\right)\\ Tacó:\dfrac{m_{ZnCl_2}}{m_{H_2}}=\dfrac{68}{1}\left(2\right)\\ \left(1\right),\left(2\right)\Rightarrow\left\{{}\begin{matrix}m_{ZnCl_2}=13,6\left(g\right)\\m_{H_2}=0,2\left(g\right)\end{matrix}\right.\)
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
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 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
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 2,4 gam Mg tac dung vua du voi 200 g dung dich axit clohidric HCl,tao thanh magie clorua va khi hidro
a,tinh the tich khi hidro thoat ra o dktc
b,tinh nong do phan tram cua dung dich HCl
c,Mot ban cho rang neu thay Nhom cho kim loai Magie thi san pham co khoi luong khong thay doi vi khoi luong kim loai lay ban dau la nhu nhau.Theo em y kien nay dung hay sai .Vi sao
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
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 5,4 gam Al vao coc dung dung dich loang chua 30gam H2SO4.Tinh khoi luong chat du sau phan ung va the tich khi thoat ra o dktc
o nhiet do phong thi nhiem (20do C), 10 gam nuoc hoa tan toi da duoc 3,6gam muoi an . Vay de co 200 gam dung dich muoi an bao hoa can luong muoi an va nuoc la bao nhieu
