What 2 things do you ask yourself to identify an igneous rock? * O what is the shape and size?
O what is the hardness and color?
O what is the color and texture?
O what is the texture and hardness?

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).