Sep 30, 2023

Calculating Moles of Elements in 2-Deoxyribose: A Step-by-Step Guide

To find the number of moles of each element present in 100.0 g of 2-deoxyribose, you can use the following steps:

Calculate the molar mass of 2-deoxyribose by summing the molar masses of its constituent elements (C, H, and O). You can find the molar masses of elements on the periodic table:

Carbon (C): 12.01 g/mol

Hydrogen (H): 1.01 g/mol

Oxygen (O): 16.00 g/mol

Now, calculate the molar mass of 2-deoxyribose:

Molar mass of 2-deoxyribose = (12.01 g/mol x 44.77%) + (1.01 g/mol x 7.52%) + (16.00 g/mol x 47.71%)

Calculate the molar mass of 2-deoxyribose:

Molar mass of 2-deoxyribose = (0.4477 x 12.01 g/mol) + (0.0752 x 1.01 g/mol) + (0.4771 x 16.00 g/mol)

Molar mass of 2-deoxyribose ≈ 5.395 g/mol

Now, you can calculate the number of moles of each element in 100.0 g of 2-deoxyribose using their respective percentages in the compound.

Moles of Carbon (C) = (44.77% / 100) x (100.0 g / 5.395 g/mol)

Moles of Hydrogen (H) = (7.52% / 100) x (100.0 g / 5.395 g/mol)

Moles of Oxygen (O) = (47.71% / 100) x (100.0 g / 5.395 g/mol)

Now, calculate each of these:

Moles of C = (0.4477 / 5.395) x 100.0 ≈ 8.29 moles of C

Moles of H = (0.0752 / 5.395) x 100.0 ≈ 1.39 moles of H

Moles of O = (0.4771 / 5.395) x 100.0 ≈ 8.84 moles of O

So, in 100.0 g of 2-deoxyribose, there are approximately 8.29 moles of carbon (C), 1.39 moles of hydrogen (H), and 8.84 moles of oxygen (O).

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