A sample of krypton gas occupies 66.7 L at 25C assuming constant pressure what will the temperature of the gas be in kelvin if the volume increases to 100 L

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

Its trait is different and it the organism survive