How many moles of solute are present in each of the following solutions? (a) 35.0 mL of 1.200 M HNO₃

Key Concepts

Molarity (M)

Molarity is a measure of concentration defined as the number of moles of solute per liter of solution. It is expressed in moles per liter (mol/L). Understanding molarity is crucial for calculating the amount of solute in a given volume of solution, as it directly relates the volume of the solution to the number of moles present.

Volume Conversion

In chemistry, it is often necessary to convert volumes from milliliters (mL) to liters (L) when working with molarity. Since 1 L equals 1000 mL, converting mL to L involves dividing the volume in mL by 1000. This conversion is essential for accurately applying the molarity formula to determine the number of moles of solute.

Calculating Moles from Molarity

To find the number of moles of solute in a solution, the formula used is: moles = molarity × volume (in liters). This relationship allows for the straightforward calculation of moles when both the molarity and the volume of the solution are known. It is a fundamental concept in stoichiometry and solution chemistry.