Quinine C20H24N2O2, is a compound extracted from cinchona tree which is traditionally used to treat malaria. If given a 1.08 g of quinine sample, calculate:

(a)the molecular mass of quinine.

(b)number of moles of quinine

324.46 amu

3.33 × 10⁻³ mol

Explanation:

(a) Calculate the molecular mass of quinine, C₂₀H₂₄N₂O₂

We will add the mass of each atom times the number of each atom in a molecule.

20 × C + 24 × H + 2 × N + 2 × O

20 × 12.01 amu + 24 × 1.01 amu + 2 × 14.01 amu + 2 × 16.00 amu

324.46 amu

(b) Calculate the number of moles of quinine in 1.08 g of quinine

The molar mass of quinine is 324.46 g/mol.

1.08 g × (1 mol/324.46 g) = 3.33 × 10⁻³ mol

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.