4Q- Solid ammonium dichromate -molar mass - 252 g- decomposes as under -NH42Cr2O7-s- -160- -8594- -8710- -160-N2-g- -160- -160-Cr2O3-s- -160- -160-4H2O-g-a- If 63 g of ammonium dichromate decomposes- what will be the quot-apparent quot- loss of mass-b- Calculate the mass of chromium-III- oxide formed at the same time- -Cr - 52-

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Standard X

Chemistry

Test for Ammonia

4Q. Solid amm...

Question

4Q. Solid ammonium dichromate (molar mass = 252 g) decomposes as under :

${(N H_{4})}_{2} C r_{2} O_{7} (s) \overset{∆}{\to} N_{2} (g) + C r_{2} O_{3} (s) + 4 H_{2} O (g)$

(a) If 63 g of ammonium dichromate decomposes, what will be the "apparent" loss of mass?
(b) Calculate the mass of chromium(III) oxide formed at the same time. (Cr = 52)

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Solution

Dear student
According to the reaction:
252g of ammonium dichromate decomposes then loss in weight is due to release of 28g nitrogen
when 63g of ammonium dichromate decomposes then loss in mass = 28/252 x 63
= 7g

1 mol ammonium dichromate decomposes to produce 1 mol Chromium oxide
252g will decompose to produce 152g chromium oxide
1g will produce =152/252 g Chromium oxide
63g will produce = 152/252 x 63 g
= 38g of Chromium oxide

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Similar questions

Solid ammonium dichromate decomposes as the equationr:

$(N H_{4} 4)_{2} C r_{2} O_{7} \to N_{2} + C r_{2} O_{3} + 4 H_{2} O$
If 63 g of sammonium dichromate decomposes, calculate:
(a) the quantity in moles of $(N H_{4})_{2} C r_{2} O_{7}$
(b) the qunatity in moles of nitrogen formed
(c) the volume of $N_{2}$ evolved at STP

(d) the loss of mass
(e) the mass of chromium (iii) oxide formed at the same time.

(N H_{4})_{2} C r_{2} O_{7} \to C r_{2} O_{3} + 4 H_{2} O + N_{2}

The mass of

C r_{2} O_{3}

formed by the decomposition of 63 gm of ammonium dichromate :

[N = 14, H = 1, O = 16, C r = 52]

(NH₄)₂Cr₂O₇ $\overset{}{\to}$ N₂ + Cr₂O₃ + 4H₂O. What volume of nitrogen at STP, will be evolved when 63 g of ammonium dichromate is decomposed? (H = 1, N = 14, O = 16, Cr = 52)

Q. Ammonium dichromate on heating decompose to form nitrogen and chromium ( lll) oxide and water what will be the loss in mass if 31.5 gram of Ammonium dichromate is heated at 100°C
(chromium=52,nitrogen=14,hydrogen=1,oxygen =16)
(NH4 )²Cr2O7 gives N2+Cr2O3+4H2O

(N H_{4})_{2} C r_{2} O_{7} \to C r_{2} O_{3} + 4 H_{2} O + N_{2}

Calculate the volume of nitrogen at STP, evolved when 63 g of ammonium dichromate is heated.

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4Q. Solid ammonium dichromate (molar mass = 252 g) decomposes as under : NH42Cr2O7(s) →∆ N2(g) + Cr2O3(s) + 4H2O(g) (a) If 63 g of ammonium dichromate decomposes, what will be the "apparent" loss of mass? (b) Calculate the mass of chromium(III) oxide formed at the same time. (Cr = 52)