How do you do unit conversion problems?
Summary
- Write the conversion as a fraction (that equals one)
- Multiply it out (leaving all units in the answer)
- Cancel any units that are both top and bottom.
How do you explain unit conversion?
A unit conversion expresses the same property as a different unit of measurement. For instance, time can be expressed in minutes instead of hours, while distance can be converted from miles to kilometers, or feet, or any other measure of length.
How do you solve for mole conversions?
Converting from moles to particles (atoms, molecules, or formula units): Multiply your mole value by Avogadro’s number, 6.02×1023. Mole-to-mole conversions: Use the coefficients from your balanced equation to determine your conversion factor. Be sure your units cancel out so you end up with the correct mole value.
How many moles of silicon dioxide are present in grams of this compound?
The mass of one mole of a molecule is equal to the mass of one mole of each of the atoms in the compound. For example the mass of one mole of Silicon dioxide is equal to 28.0855 grams for the Silicon plus 15.9994 grams for each of the oxygens.
What happens in a multi-step conversion problem?
In multi-step conversion problems, the previous unit is canceled for each step and the next unit in the sequence is produced, each successive unit canceling out until only the unit needed in the answer is left.
When do you need to convert multiple units?
Sometimes multiple conversions are needed before we end up with the units we want. For example, How many minutes are there in 2 days? The process is the same, we just repeat the steps for every unit conversion we make. Look at the units you have. Figure out the units you want.
How to convert meters to mm in one step?
Then we convert meters to mm, remembering that 1 m m = 10 − 3 m. In each step, the previous unit is canceled and the next unit in the sequence is produced, each successive unit canceling out until only the unit needed in the answer is left. Convert 58.2 ms to megaseconds in one multi-step calculation.
When do you have to do more than one conversion?
Sometimes you will have to perform more than one conversion to obtain the desired unit. For example, suppose you want to convert 54.7 km into millimeters. We will set up a series of conversion factors so that each conversion factor produces the next unit in the sequence.