Hỗn hợp A gồm etan etilen axetilen và butađien-13 Đốt c
A.13,8 gam.
B.37,4 gam.
C.58,75 gam.
D.60,2 gam.

Hoà tan hoàn toàn hỗn hợp gồm 012 mol FeS2 và a mol Cu2
A.0,06.
B.0,04.
C.0,12.
D.0,075.

Hoà tan hoàn toàn m gam oxit FexOy bằng dung dịch H2SO4
A.FeO.
B.Fe2O3.
C.Fe3O4.
D.FeO hoặc Fe3O4.

Hoà tan hoàn toàn hỗn hợp gồm 027 gam bột nhôm và 204
A.2,04 gam.
B.2,31 gam.
C.3,06 gam.
D.2,55 gam.

Tìm x biết x + 216 = 9000 x = 8794 x = 8784 x = 8884 x
A.\(x = 8794\)
B.\(x = 8784\)
C.\(x = 8884\)
D.\(x = 8084\)

Tính giá trị của biểu thức 5000 - 1200 times 2 7600 24
A.7600
B.2400
C.2600
D.3400

Tính 650405 1308 138 13080 13008 Giải chi tiếtĐặt tính
A.1308
B.138
C.13080
D.13008

Smith is enough old to make such an important decision
A.enough old
B.make  
C.important  
D.like

They have built two department stores for two years Tw
A.Two department stores have been build for two years.
B.Two department stores has been built for two years.
C.Two department stores are built for two years.
D.Two department stores have been built for two years.

They have built two department stores for two years Tw
A.Two department stores have been build for two years.
B.Two department stores has been built for two years.
C.Two department stores are built for two years.
D.Two department stores have been built for two years.