Consider the following three samples. A. A sample containing 180 g glucose (C6H12O6) B. A sample containing 90 g glucose and 90 g mannose (C6H12O6) C. A sample containing 180 g mannose Which statement is correct?

E) All three samples have the same number of hydrogen atoms

Explanation:

The statements are:

A) Sample A has more hydrogen atoms than sample B or sample C.

B) Sample B has more hydrogen atoms than sample A or sample C.

C) Sample C has more hydrogen atoms than sample A or sample B

D) Both samples A and C have the same number of hydrogen atoms, but more than in sample B.

E) All three samples have the same number of hydrogen atoms

Hydrogens in sample A are:

180g × (1mol Glucose / 180.156g) × (12mol H / 1 mol Glucose) = 12 moles of H

Hydrogens in sample B are:

90g Glucose × (1mol Glucose / 180.156g) × (12mol H / 1 mol Glucose) = 6 moles of H

90g mannose× (1mol Mannose / 180.156g) × (12mol H / 1 mol Glucose) = 6 moles of H

Total moles: 12

Hydrogens in sample C are:

180g × (1mol Mannose / 180.156g) × (12mol H / 1 mol Glucose) = 12 moles of H

Thus, right answer is:

E) All three samples have the same number of hydrogen atoms

I hope it helps!

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