A sample of polyhydric alcohol X (molar mass ) gave of at STP. The number of alcoholic hydrogen in X is .

Question

A  sample of polyhydric alcohol X (molar mass ) gave  of  at STP. The number of alcoholic hydrogen in X is .

Canvas Classes · Accepted Answer

Strategy:
 Alcoholic hydrogens react with specific reagents to release Hydrogen gas. Each mole of an -OH group provides  of  gas. Compare the moles of alcohol with the moles of  produced.

Step 1: Calculate moles of alcohol

Step 2: Calculate moles of Hydrogen gas

Step 3: Determine number of OH groups (n)
Each -OH group yields  .

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