11. Determine the pH of each of the following solutions, and state whether each is acidic, basic, or neutral:

(a) tonic water. [H30+ (aq)] = 3.1.X 10-9 mol/L
(b) wine: [H3O+ (aq)] = 2.5 X 10-3 mol/L

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.