If reactants A and B contain a total of 248 kJ of chemical energy, and products C and D contain a total of 841 kJ of chemical energy, is the reaction endothermic or exothermic?

Which of the following mixture types is characterized by the settling of particles? a. solution b. suspension c. colloid d. hydrate

Why is airborne and water borne chemicals both local and global issues

Does it require more energy to melt an ionic compound or dissolve it in water? It requires much more energy to melt it. It takes about the same amount of energy. It requires much more energy to dissolve it. Ionic compounds are insoluble in water.

3. explain the theory of continental drift.

Which of the following is not an atom found in household bleach (NaOCI) ? A) sodium (Na) B) chlorine (CI) C) hydrogen (H) D) oxygen (O)

The reaction below has an equilibrium constant kp=2.2*106 at 298 k. 2cof2 (g) ⇌co2 (g) + cf4 (g) calculate kp for the reaction below. cof2 (g) ⇌12co2 (g) + 12cf4 (g)

The electrical conductivities of the following 0.100 M solutions were measured in an apparatus that contained a light bulb as the indicator of conductivity. Rank the solutions in order of decreasing intensity (brightest to dimmest) of the light bulb.

What is the name of a list of elements arranged according to the ease with which they undergo certain chemical reactions?

Why is it harder for the earth to recover from some natural disasters now? A) Human influence may compound the damage. B) The natural disasters have gotten worse. C) This statement is not true.

Heat is most closely related to ___ energy. A. Nuclear B. Electrical C. Thermal