Determine the molar enthalpy change when argon cools from 89.1 to 19.9

Briefly define weather, season and Climate.

Which of the following has the longest wavelength? A. violet B. ultraviolet radiation C. red D. infrared radiation

Which two carbohydrates have the most similar function? A. starch and glycogen B. starch and cellulose C. glycogen and glucose D. cellulose and glucose

Which description identifies the correct charge of each atomic particle? A. electron = positive; proton = negative; neutron = no charge B. electron = negative; proton = positive; neutron = no charge C.

What volume of 24.8 mil of methane gas at STP

What is the molality of a solution containing 100 grams of glucose (C6H12O6, molar mass = 180 g/mol) dissolved in 2.5 kg of water? 0.22 m 72 m 7200 m 40 m

A battery is constructed based on the oxidation of magnesium and the reduction of cu2+. the initial concentrations of mg2 + and cu2 + are 1.2*10-4 m and 1.44 m, respectively, in 1.0-liter half-cells. how long can the battery deliver 5.

A buffer solution is made that is 0.417 M in and 0.417 M in. If for is, what is the pH of the buffer solution? pH = Write the net ionic equation for the reaction that occurs when 0.120 mol is added to 1.00 L of the buffer solution.

BaCl2 (aq) + AgNO3 (aq) → Express your answer as a chemical equation. Enter noreaction if no precipitate is formed.

Make a list of physical changes and chemical changes that you observe or see effects of in the school