In a gas molecules have to scatter off molecules to exchange energy in larger distances, so the probability of transfer is much smaller. Air is a bad conductor because, to conduct heat current molecules should absorb heat and transmit it to neighbor by vibrating.
First of all, we need tô calculate moles of KCl
next, mass=mol×molar mass
It's a base because it increases the concentration of hydroxid ions
That would be to find the age of the fossil. Its called radiometric dating.
