KOH = 58 gmol−1. : Hint: The molecular mass of caustic potash or potassium hydroxide (KOH) is found by knowing the molar masses of the elements. From the periodic table we can find that the molar mass of potassium or K is 39.098 g/mole. Similarly, the molar mass of O is found to be 15.999 g/mole from the periodic table

How do I calculate molar mass?

Multiply the atomic weight (from the periodic table) of each element by the number of atoms of that element present in the compound. 3. Add it all together and put units of grams/mole after the number. For many (but not all) problems, you can simply round the atomic weights and the molar mass to the nearest 0.1 g/mole.

What is the molar mass of so2?

64 u is the expected molecular mass of sulfur dioxide [So2]. The molar mass of sulfur is 32.1 g/mol, and oxygen is 16.0 g/mol. Therefore, the molar mass of sulfur dioxide is 1 × 32.1 + 2 × 16.0] = 64.1 g/mol.