The reaction Pb(NO3)2(aq) + 2KI(aq) --> PbI2(s) + 2KNO3(aq) is a... decomposition reaction.
double-replacement reaction. synthesis reaction.
combustion reaction.

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

Express the following number in scientific notation. 0.026890 =