Compare the solubility of calcium sulfide in each of the following aqueous solutions:

i. 0.10 M Ca(CH3COO)2 ii. 0.10 M K2S iii. 0.10 M NaCH3COO iv. 0.10 M NH4NO3

a. More soluble than in pure water.
b. Similar solubility as in pure water.
c. Less soluble than in pure water.

What is the molality of a solution that has 4 mol of kci in 0.800 kg of water

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Which one of the following bonds would you expect to be the most polar? a) b–h b) n–h c) p–h d) al–h e) c–h