Agas sample has a volume of 0.225 l with an unknown temperature. the same gas has a volume of 0.180 l when the temperature is 35 ∘c, with no change in the pressure or amount of gas. part a what was the initial temperature, in degrees celsius, of the gas?

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?