Question

calculate the molecular mass of potassium hydroxide (k=39,h=1,o=9)​

Answer 1

Molecular mass of KOH =39+9+1

= 49u

Answer 2

Answer:

The molecular mass of KOH is 56g/mole approx.

Explanation:

• The mass in grammes of one mole of a substance is known as its molar mass. The abbreviation g/mole stands for grammes per mole, which are the units of molar mass.
• The molecular mass of a substance is the ratio of how much heavier one mole of that material is to, for example, 1/16th the mass of an oxygen atom or 1/12th the mass of a carbon atom.
• We know that the molar mass of potassium or K is 39.098 g/mole.
• Similarly, the molar mass of O is 15.999 g/mole from the periodic table.
• Molar mass of H is 1.00784 g/mole.
• We know the formula of caustic potash is KOH.
• The molecular weight of caustic potash or KOH (potassium hydroxide) is = Molar mass of K + Molar mass of O + Molar mass of H = (39.098 + 15.999 + 1.00784) g/mole = 56.10484 g/mole
• ≈56 g/mole

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