Question

Nutra sweet is composed of 57.14% C, 6.16% H, 9.52% N, and 27.18% O. Calculate the empirical formula of Nutra sweet and the molecular formula.

a) Empirical Formula: C6H5NO₂​, Molecular Formula: C12H10N₂O4
b) Empirical Formula: CHNO, Molecular Formula: C6H5N₂O2
c) Empirical Formula: C3H3NO, Molecular Formula: C6H6N₂O₃
d) Empirical Formula: C5H4NO₂, Molecular Formula: C10H8N₂O4

Answer 1

The empirical formula of Nutra sweet is C5H7NO and the molecular formula is C10H14N2O2.

Step-by-step explanation:

The empirical formula of Nutra sweet can be calculated by finding the lowest whole-number ratio of the elements present. From the given percentages, we can determine that the molar ratios of C to H to N to O are approximately 5:7:1:2. Therefore, the empirical formula of Nutra sweet is C5H7NO.

To determine the molecular formula, we need to know the molar mass of Nutra sweet.

From the given information, we can calculate the empirical formula mass, which is 81.13 g/mol formula unit. If the molar mass of Nutra sweet is a multiple of the empirical formula mass, then the molecular formula is a multiple of the empirical formula.

Since the molar mass of Nutra sweet is approximately 162.26 g/mol, which is exactly double the empirical formula mass, the molecular formula of Nutra sweet is 2 times the empirical formula, resulting in the molecular formula C10H14N2O2.