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  4. grams of 3-Hydroxy propanal ( MW =74) must be dehydrated to produce 7.8 g of acrolein ( MW =56)( C 3 H 4 O ) if the percentage yield is 64. (Round off to the Nearest Integer). [Given: Atomic masses: C: 12.0 u, H: 1.0 u , O: 16.0 u ]

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Q. ___grams of 3-Hydroxy propanal $( MW =74)$
must be dehydrated to produce $7.8\, g$ of acrolein $( MW =56)\left( C _{3} H _{4} O \right)$ if the percentage yield is
64. (Round off to the Nearest Integer).
[Given : Atomic masses $: C : 12.0\, u,\, H : 1.0\, u , O :\, 16.0\, u$ ]

JEE MainJEE Main 2021Some Basic Concepts of Chemistry

Solution:

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$\frac{ x }{74}$ mol

$\frac{ x }{74} \times 0.64=\frac{7.8}{56}$

$x =16.10$

$\simeq 16.00$