A calorimeter contains 251 g of water at 24.3 C. The temperature of the water decreases to 18.5 C when 12.5 g of potassium nitrate is dissolved in water. Is dissolving potassium nitrate in water endothermic or exothermic

Balance αC6H14 (g) + βO2 (g) →γCO2 (g) + δH2O (g)

If HA, an acid, is 15 percent dissociated in a 2.00 molar solution, what is the Ka for the solution? A. 5.3 * 10-2 B. 6.4 * 10-3 C. 1.1 * 10-2 D. 1.2 * 10-2

Write the balanced net ionic equation for a solution formed from CaCl2 (aq) and Na2SO4 (aq)

Gravity will pull a pencil down with the same force as a feather with the same mass. This is an example of what?

Occurs when a melt is produced when the minerals with the lowest melting temperature melt, while the other minerals remain solid.

A graduated cylinder is filled to the 40.00-mL mark with a mineral oil. The masses of the cylinder before and after the addition of the mineral oil are 124.966 g and 159.446 g, respectively. In a separate experiment, a metal ball bearing of mass 18.

Which element in Group 15 has the greatest metallic character? 1) N 2) P 3) Sb 4) Bi

Choose the statement below that is TRUE. A solution will form between two substances if solute-solvent interactions are of comparable strength to the solute-solute and solvent-solvent interactions.

When liquid silver nitrate and liquid sodium chloride are combined, solid silver chloride forms along with a new liquid, sodium nitrate. Witch substance represents the precipitate? Silver nitrate silver chloride sodium chloride sodium nitrate

The summer season at Arica and Rio de Janeiro Occurs from approximately