Final answer:
The properties concerning natural gas and propane can be found on page 15.7 of the codebook, which provides information about their nature and processing as well as alternative fuels.
Step-by-step explanation:
The properties concerning natural gas and propane can be found on page 15.7 of the codebook.
On this page, you will find information about the nature and processing of natural gas, petroleum, and gasoline. It also lists different alternative fuels.
The properties concerning natural gas and propane can be found on page 15.7 of the codebook, which provides information about their nature and processing as well as alternative fuels.