0.5 g of an organic compound on combustion gave 1.46 g of and 0.9 g of . The percentage of carbon in the compound is . (Nearest integer)

[Given: Molar mass (in ): C: 12, H: 1, O: 16]

Question

0.5 g of an organic compound on combustion gave 1.46 g of  and 0.9 g of . The percentage of carbon in the compound is . (Nearest integer)

[Given: Molar mass (in ): C: 12, H: 1, O: 16]

Canvas Classes · Accepted Answer

Step 1: Understand Liebig's Combustion Method

In elemental analysis (Liebig's method), the organic compound is burned completely in excess oxygen. Carbon is converted to  and hydrogen to :

Step 2: Calculate Percentage of Carbon

Given:
- Mass of organic compound = 0.5 g
- Mass of  produced = 1.46 g
- Molar mass of  = 44 g/mol; molar mass of C = 12 g/mol

Mass of carbon in :

Step 3: Verify with Hydrogen

Given: Mass of  produced = 0.9 g
- Molar mass of  = 18 g/mol; mass of H in  = 2 g/mol

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