Water has a specific heat of 4.186 J/gºC, and ethanol has a specific heat of 2.450 J/gºC. Based on this information, which best compares water and ethanol?
It requires more heat to raise the temperature of a gram of ethanol by 1°C.
O There are more molecules in a gram of water.
O Ethanol has a lower formula mass.
O Water has more protons and neutrons in its nuclei.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.