A helium-filled balloon has a volume of 2.75 L at 20 C. The volume of the balloon decreases to 2.46 L after it is placed outside on a cold day. What is the outside
temperature in C?

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

Amass of 100.0 g of solute is dissolved in water so that 850. ml of a 0.7500 m solution has been prepared. what is the molar mass of the solute?

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.