Question

From the equation {{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\to C{{r}_{2}}{{O}_{3}}+4{{H}_{2}}O+{{N}_{2}}(NH 4 ​ ) 2 ​ Cr 2 ​ O 7 ​ →Cr 2 ​ O 3 ​ +4H 2 ​ O+N 2 ​ , calculate the mass of chromium(III) oxide C{{r}_{2}}{{O}_{3}}Cr 2 ​ O 3 ​ formed when 63g of ammonium dichromate is heated (N=14u, H=1u, Cr=52u, O=16u).

Answer 1

Answer:

2H

2

S(g)⇌2H

2

(g)+S

2

(g)

At 1mol 0.2 0.8

eqb

conc 1/2 0.2/2 0.8/2

=0.1 =0.4

K

C

=

(0.5)

2

(0.1)

2

×(0.4)

⇒4×0.4×10

−2

⇒0.016