Moderate

Glucose(C6H12O6) is the most important nutrient in a cell for generating chemical potential energy, what is the mass percent of carbon in 1.5g of sample?

Correct answer: B. 40%

  • A. 33%
  • B. 40%
  • C. 53.3%
  • D. 6.67%

Explanation

The mass percent of the carbon in a 1.5g sample of glucose is approximately 40%. To determine the mass percent of carbon in a sample of glucose (C6H12O6), we need to calculate the mass of carbon in the sample and then express it as a percentage of the total mass. The molar mass of glucose is calculated as follows: C: 6 atoms x 12.01 g/mol = 72.06 g/mol H: 12 atoms x 1.01 g/mol = 12.12 g/mol O: 6 atoms x 16.00 g/mol = 96.00 g/mol Total molar mass of glucose: 72.06 g/mol + 12.12 g/mol + 96.00 g/mol = 180.18 g/mol Now, to find the mass of carbon in 1.5 g of glucose, we can use the molar mass ratio of carbon to glucose: Mass of carbon = (Mass of glucose / Molar mass of glucose) x Molar mass of carbon Mass of carbon = (1.5 g / 180.18 g/mol) x 72.06 g/mol Mass of carbon = 0.599 g Finally, we can calculate the mass percent of carbon in the sample: Mass percent of carbon = (Mass of carbon / Mass of sample) x 100 Mass percent of carbon = (0.599 g / 1.5 g) x 100 Mass percent of carbon = 39.93% Therefore, the mass percent of carbon in a 1.5 g sample of glucose is approximately 39.93%.

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