Question

determine the molar mass of potassium hydroxide.
73.12 g/mol
95.21 g/mol
57.12 g/mol
56.11 g/mol
what is the unit for molar mass? *
mol
mol/g
g/mol
g

Explanation:

First Sub - Question (Determine the molar mass of potassium hydroxide)

Step 1: Identify the formula of potassium hydroxide

Potassium hydroxide has the chemical formula \(KOH\). It is composed of one potassium (\(K\)) atom, one oxygen (\(O\)) atom, and one hydrogen (\(H\)) atom.

Step 2: Find the atomic masses of each element

The atomic mass of \(K\) is approximately \(39.10\space g/mol\), the atomic mass of \(O\) is approximately \(16.00\space g/mol\), and the atomic mass of \(H\) is approximately \(1.01\space g/mol\).

Step 3: Calculate the molar mass

To find the molar mass of \(KOH\), we sum the atomic masses of its constituent atoms. So, molar mass \(M = \text{atomic mass of }K+\text{atomic mass of }O+\text{atomic mass of }H\).
Substituting the values: \(M = 39.10+16.00 + 1.01=56.11\space g/mol\).

Molar mass is defined as the mass of one mole of a substance. Mass is measured in grams (\(g\)) and the amount of substance is measured in moles (\(mol\)). So the unit of molar mass is grams per mole, which is \(g/mol\).

Answer:

56.11 g/mol

Second Sub - Question (What is the unit for molar mass?)