A balloon is filled to a volume of 1.50 L with 3.00 moles of gas at 25.0 °C. With pressure and temperature held constant, what will be the volume (in L) of the balloon if 0.90 moles of gas are added?

Based on the equation and the information in the table, what is the enthalpy of the reaction?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?