University of Central Florida (UCF) CHM2045C Chemistry Fundamentals I Practice Exam 1

To convert grams to kilograms, you should use the conversion factor that 1 kilogram equals 1000 grams. Therefore, to convert a mass from grams to kilograms, you divide the mass in grams by 1000.

In this case, the substance has a mass of 300 grams. Dividing 300 grams by 1000 gives you:

\[

300 \, \text{g} \div 1000 = 0.3 \, \text{kg}

\]

Thus, the mass of the substance in kilograms is 0.3 kg. This conversion is straightforward and relies on understanding the relationship between the units of grams and kilograms. By properly applying the conversion factor, the calculation yields the correct result for the mass of the substance in the desired unit.