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Q18 (CDS-II/2017) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Basic chemical principles Answer Verified

How many hydrogen atoms are contained in 1-50 g of glucose (C6H1206)?

Result
Your answer: —  Â·  Correct: D
Explanation

To find the number of hydrogen atoms in 1.50 g of glucose (C6H12O6), we first determine the molar mass of glucose. Summing the atomic masses of 6 carbon, 12 hydrogen, and 6 oxygen atoms yields approximately 180 g/mol. The number of moles in 1.50 g is calculated by dividing the mass by the molar mass: 1.50 g / 180 g/mol ≈ 0.00833 moles. Since each molecule of glucose contains 12 hydrogen atoms, one mole of glucose contains 12 moles of hydrogen atoms. Using Avogadro's number (6.022 x 10^23), the total number of hydrogen atoms is calculated as: 0.00833 moles!! 12!! 6.022 x 10^23 ≈ 6.02 x 10^22 atoms. This matches option 4.

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