0.1 mole of a carbohydrate with empirical formula CH2O contains 1 g of hydrogen. What is its molecular formula?

Question

0.1 mole of a carbohydrate with empirical formula CH2O contains 1 g of hydrogen. What is its molecular formula? (A)  C5H10O5  (B)  C6H12O6  (C)  C4H8O4  (D)  C3H6O3

Tardigrade Admin · Accepted Answer

∵ 0.1 mole of carbohydrate contains =1g of hydrogen. ∴ 1 mole of carbohydrate contains =(1/0.1) =10g of hydrogen Hence, its molecular formula =C5H10O5 .

Q. $0.1$ mole of a carbohydrate with empirical formula $C H_{2} O$ contains $1 g$ of hydrogen. What is its molecular formula?

$C_{5} H_{10} O_{5}$

$C_{6} H_{12} O_{6}$

$C_{4} H_{8} O_{4}$

$C_{3} H_{6} O_{3}$

$C_{2} H_{4} O_{2}$

$∵$ 0.1 mole of carbohydrate contains $= 1 g$ of hydrogen.
$∴$ 1 mole of carbohydrate contains $= \frac{1}{0.1}$
=10g of hydrogen
Hence, its molecular formula $= C_{5} H_{10} O_{5}$ .

Q. 0.1 mole of a carbohydrate with empirical formula CH2​O contains 1g of hydrogen. What is its molecular formula?

C5​H10​O5​

C6​H12​O6​

C4​H8​O4​

C3​H6​O3​

C2​H4​O2​

∵ 0.1 mole of carbohydrate contains =1g of hydrogen. ∴ 1 mole of carbohydrate contains =0.11​ =10g of hydrogen Hence, its molecular formula =C5​H10​O5​ .