Con students recognize that unit conversion math is a rearranged rotio between two quantities? A big part of Introductory Chemistry is learning to master what is called a "unit conversion." Unit Conversions determine an equal value in terms of one unit of measurement to another unit. The concept has its roots in mathematical ratios. A common ratio for example: (1inch254cm)=(15.25inchesxan) Show how the equation is rearranged to solve for xcm (without actually solving for x ) The Unit Conversion method solves the same problem without the extra algebra step of rearranging the equation to solve for x. The unit conversion problem does not require that you set up a ratio first! It only requires that you 1. Identify the value and unit you want to convert 2. The unit you want to convert it to 3. The numerical relationship between the two units. 4. Set up the problem so that like units cancel Unit A(UnitAUnitB)= Unit B In the above example 1. 15.25 inches is the unit you want to convert 2. Convert this value and unit to centimeter units 3. The relationship between the units is 2.54cm=1 inch (this equality is written as a "conversion factor" (1inch2.54cm) 4. Set up the problem so that inches cancel 15.25inches(1inch2.54cm)=xcm