I am supposed to calculate the mole ratio and I had given four numbers are: 0.679, 1.151, 1.153 and 2.35. So which number I gotta select as least number and why I select it?

To determine which number should be selected as the least, you need to compare the values and identify the smallest number among the given options.

Comparing the four numbers you provided: 0.679, 1.151, 1.153, and 2.35, you can see that the smallest number is 0.679. This is the least number in the given set, as it has the smallest numerical value.