So at this point, we know that conversion factors tie together two different units, and we're going to say that the most common conversion factors deal with units involved in IT length, volume, and mass. Now we can see that there's a lot of conversion factors being listed here. And remember, only the ones that are in purple boxes are ones that you should commit to memory and memorize. All the other ones are usually given to you in some way or another, either within the question or as a formula sheet. So consult with your professor to make sure which one of these you need to know for the upcoming exam or quiz or homework.
OK, the ones in purple, though, you should always at least know those. All right. So when it comes to length, the conversion factors and the first one we need to memorize, 1 inch = 2.54 centimeters. Next, we can say that 1 m = 1.094 yards, 1 yard = 3 feet, 1 mile = 5280 feet, and then finally 1 kilometer = 0.6214 miles. So these are our most common types of conversion factors dealing with length.
Next we have volume out of this, the one that you should always remember is 1 milliliter = 1 centimeters3. Then we're going to say here that 1 liter = 1 decimeters3, 1 liter = 1.057 quarts, and 1 gallon = 3.785 liters. Finally, mass for mass, we can say 1 oz = 28.35 grams, 1 kilogram = 2.205 lbs, and finally we have 1.00 lb = 453.59 grams. Oftentimes professors will just round this up to 454 grams for the number of for equal to 1 lb.
So again, as we can see, there's many different conversion factors. These are the most commonly seen ones within chemistry. And out of all of these, the one you should always memorize for sure are the two that are in the purple boxes. The other ones consult with your professor to make sure if you have to memorize them or will they be given to you on your upcoming quizzes or exams. All right. Now that we've seen these common types of conversion factors, let's move on to the next question.