JEE MAIN - Chemistry (2022 - 25th June Morning Shift - No. 23)
Number of grams of bromine that will completely react with 5.0 g of pent-1-ene is ___________ $$\times$$ 10$$-$$2 g. (Atomic mass of Br = 80 g/mol) [Nearest Integer]
Answer
1143
Explanation
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Molar mass of C5H10 = 12 $$\times$$ 5 + 10 = 70 gm
Given mass of C5H10 = 5 gm
$$\therefore$$ Moles of C5H10 = $${5 \over {70}}$$
From reaction,
1 mole of C5H10 reacts with 1 mole of Br2
$$\therefore$$ $${5 \over {70}}$$ moles of C5H10 reacts with $${5 \over {70}}$$ moles of Br2
$$\therefore$$ Reacted Br2 = $${5 \over {70}}$$ $$\times$$ 160 gm
= 11.428 gm
= 1142.8 $$\times$$ 10$$-$$2 gm
$$\simeq$$ 1143 $$\times$$ 10$$-$$2 gm
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