2. Which unit listed below is used to measure solution concentration in chemistry? electronegativity E E molarity E solubility E viscosity

## Step 1<br />The question asks us to identify the unit used to measure solution concentration in chemistry. The options provided are electronegativity, molarity, solubility, and viscosity.<br /><br />## Step 2<br />Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. It is not a unit of concentration.<br /><br />## Step 3<br />Solubility is a measure of how well a substance can dissolve in a particular solvent. It is not a unit of concentration.<br /><br />## Step 4<br />Viscosity is a measure of a fluid's resistance to flow. It is not a unit of concentration.<br /><br />## Step 5<br />Molarity is a unit of concentration in chemistry. It is defined as the number of moles of solute divided by the volume of the solution in liters.