which two forces act on igneous rock to change it into metamorphic rock? a)      erosion and pressure b)      heat and volcanism c)      heat and pressure d)      sediment and erosion    

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

Anurse used a 0.02-mg/l solution of disinfection to clean a patients wound. what is the concentration of the solution expressed as a percentage?