The empirical formula is K₂CO₃.
This formula represents the most simplified whole-number ratio of atoms in a chemical compound.
The atom ratio aligns with the mole ratio, which means our task is to find the molar ratios for K:C:O.
I prefer to summarize these calculations in table form.
Element Moles Ratio¹ Integers²
K 0.104 2.00 2
C 0.052 1.00 1
O 0.156 3.00 3
¹ To obtain the molar ratio, each mole value is divided by the smallest mole count.
² Convert the ratio values to integers (2, 1, and 3).
The empirical formula is K₂CO₃.
Answer:
The designation of 70% (vol/vol) indicates
that it contains 70% (vol/vol), meaning 70 ml of isopropanol is included in 100 ml of rubbing alcohol solution.
If it were 200 ml, then naturally, it would contain 70*2 = 140 ml of isopropanol required.
