Here are the key steps to writing an abstract for a lab report on determining the molar mass of an unknown using the ideal gas law:
1. State the purpose of the experiment - to determine the molar mass of an unknown substance.
2. Briefly describe the method - an unknown solid was heated to become a gas and measurements of its mass, volume, and temperature were recorded.
3. Mention the key equation used - the ideal gas law, PV=nRT, was used to calculate the molar mass.
4. Indicate the important result - rearranging the ideal gas equation allowed the molar mass of the unknown to be determined.
A sample abstract following these steps would be