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Q.

What mass of solid ammonium carbonate H2NCOONH4, when vaporized at 273∘C, will have a volume of 8.96 L at 760 mm of pressure? Assume that the solid completely decomposes as:

H2NCOONH4(s)⟶CO2(g)+2NH3(g)

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a

15.6 gm

b

5.2 gm

c

46.8 gm

d

7.8 gm

answer is B.

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Detailed Solution

 H2NCOONH4(s)a moles→CO2(g)+2NH3(g)

                −         a         2a

3a=760760×8.96546×10.0821

⇒ Mass =a×78=5.2 g

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