4. Answer the question below. Use the rubric in the materials for help if needed. Calculate the enthalpy change for the reaction 2K + S + KS using the following thermochemical reactions.
K+S+ KSAH = +32.5 kJ
KS + K + K2S AH = +38.2 kJ

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m

Based on its chemical properties, identify the position of each chemical family on the periodic table.

Complete the following statements to describe solids, liquids, and gases. select the correct answer from each drop-down menu. a solid a definite volume and a definite shape. a liquid a definite volume and a definite shape. a gas a definite volume and a definite shape