Agas has than its liquid form. (select all answers that apply) select one or more: a. a lower temperature b. more energy c. less energy d. a higher temperature

The answer is D, pretty sure it's the only answer, too: A higher temperature. Take steam, for example. Steam is just a hotter version of liquid water, and it's in gas form.

A gas has a lower temperature so D.

The answer is d.potassium

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).